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Consolidated Schedule of Investments (Parenthetical)
€ in Thousands, £ in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
investment
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
investment
Sep. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
investment
Sep. 30, 2025
EUR (€)
investment
Sep. 30, 2025
GBP (£)
investment
Dec. 31, 2024
EUR (€)
investment
Sep. 30, 2023
USD ($)
Sep. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
May 03, 2013
USD ($)
Cost basis of securities purchased under collateralized agreements to resell $ 30,000   $ 30,000   $ 30,000              
Fair value of securities purchased under collateralized agreements to resell 13,500   13,500   13,500              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [1]     3,091,024                  
Net Change In Unrealized Appreciation (Depreciation) (21,684) $ (8,471) (110,689) $ 25,164                
Fair value, ending balance 2,943,619 [2]   2,943,619 [2]   $ 3,091,024 [1]              
Net Realized Gains (Losses) $ 9 (1,986) $ 51,223 (44,979)                
Investments at fair value that are non-qualifying assets as a percentage of total assets 15.10%   15.10%   14.60% 15.10% 15.10% 14.60%        
Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.) / Eagle Infrastructure Super HoldCo, LLC                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     $ 19,156 17,873 $ 17,873              
Gross additions [3]         0              
Gross redemptions [4]         (50)              
Net Change In Unrealized Appreciation (Depreciation)         1,333              
Fair value, ending balance         19,156              
Net Realized Gains (Losses)         0              
Interest Income         1,432              
Dividend Income         0              
Other Income         0              
Sierra Hamilton Holdings Corporation                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     2,000 2,000 2,000              
Gross additions [3]         0              
Gross redemptions [4]         0              
Net Change In Unrealized Appreciation (Depreciation)         0              
Fair value, ending balance         2,000              
Net Realized Gains (Losses)         0              
Interest Income         0              
Dividend Income         0              
Other Income         0              
TVG-Edmentum Holdings, LLC / Edmentum Ultimate Holdings, LLC                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     91,620 113,786 113,786              
Gross additions [3]         16,409              
Gross redemptions [4]         0              
Net Change In Unrealized Appreciation (Depreciation)         (38,575)              
Fair value, ending balance         91,620              
Net Realized Gains (Losses)         0              
Interest Income         3,659              
Dividend Income         5,843              
Other Income         250              
NMFC Senior Loan Program III LLC                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Dividend Income $ 5,600 5,567 17,000 17,205                
NMFC Senior Loan Program IV LLC                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Dividend Income 3,794 3,794 11,521 12,153                
Non-controlled/Affiliated                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     112,776 [5] 133,659 133,659              
Gross additions     5,465 [6]   16,409 [3]              
Gross redemptions     0 [7]   (50) [4]              
Net Change In Unrealized Appreciation (Depreciation)     (23,555)   (37,242)              
Fair value, ending balance 94,686 [8]   94,686 [8]   112,776 [5]              
Net Realized Gains (Losses)     0   0              
Interest Income     4,165   5,091              
Dividend Income     2,279   5,843              
Other Income 63 63 188 188 250              
Non-controlled/Affiliated | Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.) / Eagle Infrastructure Super HoldCo, LLC                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     19,156                  
Gross additions [6]     0                  
Gross redemptions [7]     0                  
Net Change In Unrealized Appreciation (Depreciation)     (820)                  
Fair value, ending balance 18,336   18,336   19,156              
Net Realized Gains (Losses)     0                  
Interest Income     994                  
Dividend Income     0                  
Other Income     0                  
Non-controlled/Affiliated | Sierra Hamilton Holdings Corporation                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     2,000                  
Gross additions [6]     0                  
Gross redemptions [7]     0                  
Net Change In Unrealized Appreciation (Depreciation)     0                  
Fair value, ending balance 2,000   2,000   2,000              
Net Realized Gains (Losses)     0                  
Interest Income     0                  
Dividend Income     0                  
Other Income     0                  
Non-controlled/Affiliated | TVG-Edmentum Holdings, LLC / Edmentum Ultimate Holdings, LLC                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     91,620                  
Gross additions [6]     5,465                  
Gross redemptions [7]     0                  
Net Change In Unrealized Appreciation (Depreciation)     (22,735)                  
Fair value, ending balance 74,350   74,350   91,620              
Net Realized Gains (Losses)     0                  
Interest Income     3,171                  
Dividend Income     2,279                  
Other Income     188                  
Controlled                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     700,896 [9] 667,796 667,796              
Gross additions     89,079 [10]   47,177 [11]              
Gross redemptions     (60,582) [12]   (14,413) [13]              
Net Change In Unrealized Appreciation (Depreciation)     (53,833)   336              
Fair value, ending balance 675,560 [14]   675,560 [14]   700,896 [9]              
Net Realized Gains (Losses)     38,898   2,000              
Interest Income     15,265   21,449              
Dividend Income     43,573   55,086              
Other Income 375 $ 679 2,578 2,049 3,392              
Controlled | Haven Midstream LLC / Haven Midstream Holdings LLC / QID TRH Holdings LLC                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     0 3,419 3,419              
Gross additions [11]         0              
Gross redemptions [13]         0              
Net Change In Unrealized Appreciation (Depreciation)         (3,419)              
Fair value, ending balance         0              
Net Realized Gains (Losses)         4,981              
Interest Income         0              
Dividend Income         0              
Other Income         41              
Controlled | National HME, Inc./NHME Holdings Corp.                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     3,000 3,000 3,000              
Gross additions     0 [10]   0 [11]              
Gross redemptions     0 [12]   0 [13]              
Net Change In Unrealized Appreciation (Depreciation)     0   0              
Fair value, ending balance 3,000   3,000   3,000              
Net Realized Gains (Losses)     0   0              
Interest Income     0   0              
Dividend Income     0   0              
Other Income     0   0              
Controlled | New Benevis Topco, LLC / New Benevis Holdco, Inc.                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     140,102 135,401 135,401              
Gross additions     13,606 [10]   10,595 [11]              
Gross redemptions     0 [12]   0 [13]              
Net Change In Unrealized Appreciation (Depreciation)     (1,916)   (5,894)              
Fair value, ending balance 151,792   151,792   140,102              
Net Realized Gains (Losses)     0   0              
Interest Income     10,489   12,934              
Dividend Income     0   0              
Other Income     1,383   375              
Controlled | New Permian Holdco, Inc. / New Permian Holdco, L.L.C.                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     63,076 63,170 63,170              
Gross additions     6,159 [10]   7,005 [11]              
Gross redemptions     0 [12]   0 [13]              
Net Change In Unrealized Appreciation (Depreciation)     (5,901)   (7,099)              
Fair value, ending balance 63,334   63,334   63,076              
Net Realized Gains (Losses)     0   0              
Interest Income     4,260   5,382              
Dividend Income     0   0              
Other Income     375   500              
Controlled | NM APP CANADA CORP                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     0 7 7              
Gross additions [11]         0              
Gross redemptions [13]         0              
Net Change In Unrealized Appreciation (Depreciation)         (7)              
Fair value, ending balance         0              
Net Realized Gains (Losses)         31              
Interest Income         0              
Dividend Income         0              
Other Income         0              
Controlled | NM CLFX LP                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     0 11,731 11,731              
Gross additions [11]         0              
Gross redemptions [13]         (12,279)              
Net Change In Unrealized Appreciation (Depreciation)         548              
Fair value, ending balance         0              
Net Realized Gains (Losses)         (2,461)              
Interest Income         0              
Dividend Income         24              
Other Income         845              
Controlled | NM NL Holdings, L.P.                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     104,512 96,071 96,071              
Gross additions     0 [10]   0 [11]              
Gross redemptions     0 [12]   (2,123) [13]              
Net Change In Unrealized Appreciation (Depreciation)     1,366   10,564              
Fair value, ending balance 105,878   105,878   104,512              
Net Realized Gains (Losses)     0   (548)              
Interest Income     0   0              
Dividend Income     6,564   8,116              
Other Income     0   181              
Controlled | NM GP Holdco, LLC                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     322 1,048 1,048              
Gross additions     0 [10]   0 [11]              
Gross redemptions     0 [12]   (11) [13]              
Net Change In Unrealized Appreciation (Depreciation)     71   (715)              
Fair value, ending balance 393   393   322              
Net Realized Gains (Losses)     0   (3)              
Interest Income     0   0              
Dividend Income     33   89              
Other Income     0   0              
Controlled | NM YI LLC                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     9,960 9,550 9,550              
Gross additions     0 [10]   0 [11]              
Gross redemptions     0 [12]   0 [13]              
Net Change In Unrealized Appreciation (Depreciation)     (1,287)   410              
Fair value, ending balance 8,673   8,673   9,960              
Net Realized Gains (Losses)     0   0              
Interest Income     0   0              
Dividend Income     674   879              
Other Income     0   0              
Controlled | NMFC Senior Loan Program III LLC                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     160,000 140,000 140,000              
Gross additions     0 [10]   20,000 [11]              
Gross redemptions     0 [12]   0 [13]              
Net Change In Unrealized Appreciation (Depreciation)     0   0              
Fair value, ending balance 160,000   160,000   160,000              
Net Realized Gains (Losses)     0   0              
Interest Income     0   0              
Dividend Income     17,000   23,304              
Other Income     0   0              
Controlled | NMFC Senior Loan Program IV LLC                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     112,400 112,400 112,400              
Gross additions     0 [10]   0 [11]              
Gross redemptions     0 [12]   0 [13]              
Net Change In Unrealized Appreciation (Depreciation)     0   0              
Fair value, ending balance 112,400   112,400   112,400              
Net Realized Gains (Losses)     0   0              
Interest Income     0   0              
Dividend Income     11,521   16,228              
Other Income     0   0              
Controlled | UniTek Global Services, Inc.                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance     107,524 $ 91,999 91,999              
Gross additions     69,314 [10]   9,577 [11]              
Gross redemptions     (60,582) [12]   0 [13]              
Net Change In Unrealized Appreciation (Depreciation)     (46,166)   5,948              
Fair value, ending balance 70,090   70,090   107,524              
Net Realized Gains (Losses)     38,898   0              
Interest Income     516   3,133              
Dividend Income     7,781   6,446              
Other Income     820   1,450              
Investment, Identifier [Axis]: AAC Lender Holdings, LLC, Ordinary shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [15],[16],[17]     0                  
Fair value, ending balance 0 [18],[19],[20]   0 [18],[19],[20]   0 [15],[16],[17]              
Investment, Identifier [Axis]: AAH Topco, LLC, First lien - Undrawn                        
Principal Amount or Par Value 3,659 [19],[20],[21],[22]   3,659 [19],[20],[21],[22]   3,659 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: AAH Topco, LLC, First lien 1                        
Principal Amount or Par Value $ 22,560 [19],[21],[25],[26]   $ 22,560 [19],[21],[25],[26]   $ 22,733 [16],[23],[27],[28]              
Spread 5.25% [19],[25],[26]   5.25% [19],[25],[26]   5.25% [16],[27],[28] 5.25% [19],[25],[26] 5.25% [19],[25],[26] 5.25% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 22,734                  
Fair value, ending balance $ 22,560 [19],[25],[26]   22,560 [19],[25],[26]   $ 22,734 [16],[27],[28]              
Investment, Identifier [Axis]: AAH Topco, LLC, First lien 2                        
Principal Amount or Par Value $ 20,061 [19],[20],[21],[29]   $ 20,061 [19],[20],[21],[29]   $ 20,218 [16],[17],[23],[30]              
Spread 5.25% [19],[20],[29]   5.25% [19],[20],[29]   5.25% [16],[17],[30] 5.25% [19],[20],[29] 5.25% [19],[20],[29] 5.25% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 20,218                  
Fair value, ending balance $ 20,061 [19],[20],[29]   20,061 [19],[20],[29]   $ 20,218 [16],[17],[30]              
Investment, Identifier [Axis]: AAH Topco, LLC, First lien 3                        
Principal Amount or Par Value $ 9,525 [19],[21],[31]   $ 9,525 [19],[21],[31]   $ 9,599 [16],[23],[32]              
Spread 5.25% [19],[31]   5.25% [19],[31]   5.25% [16],[32] 5.25% [19],[31] 5.25% [19],[31] 5.25% [16],[32]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32]     $ 9,599                  
Fair value, ending balance $ 9,525 [19],[31]   9,525 [19],[31]   $ 9,599 [16],[32]              
Investment, Identifier [Axis]: AAH Topco, LLC, First lien 4                        
Principal Amount or Par Value $ 7,319 [19],[21],[31]   $ 7,319 [19],[21],[31]   $ 7,375 [16],[23],[32]              
Spread 5.25% [19],[31]   5.25% [19],[31]   5.25% [16],[32] 5.25% [19],[31] 5.25% [19],[31] 5.25% [16],[32]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32]     $ 7,375                  
Fair value, ending balance $ 7,319 [19],[31]   7,319 [19],[31]   $ 7,375 [16],[32]              
Investment, Identifier [Axis]: AAH Topco, LLC, Subordinated 1                        
Principal Amount or Par Value 17,145 [19],[20],[21],[29]   17,145 [19],[20],[21],[29]   15,733 [16],[17],[23],[30]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     15,366                  
Fair value, ending balance 16,901 [19],[20],[29]   16,901 [19],[20],[29]   15,366 [16],[17],[30]              
Investment, Identifier [Axis]: AAH Topco, LLC, Subordinated 2                        
Principal Amount or Par Value 6,724 [19],[21],[31]   6,724 [19],[21],[31]   6,170 [16],[23],[32]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32]     6,027                  
Fair value, ending balance $ 6,628 [19],[31]   $ 6,628 [19],[31]   $ 6,027 [16],[32]              
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien                        
Number of investments held | investment 2   2   2 2 2 2        
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien - Drawn                        
Principal Amount or Par Value [16],[17],[23],[24]         $ 235              
Spread [16],[17],[24]         5.50%     5.50%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     $ 228                  
Fair value, ending balance [16],[17],[24]         $ 228              
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22] $ 1,224   $ 1,224                  
Spread [19],[20],[22] 5.50%   5.50%     5.50% 5.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 1,102   $ 1,102                  
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien - Undrawn                        
Principal Amount or Par Value 1,130 [19],[20],[21],[22],[33]   1,130 [19],[20],[21],[22],[33]   2,118 [16],[17],[23],[24],[34]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[34]     (62)                  
Fair value, ending balance (113) [19],[20],[22],[33]   (113) [19],[20],[22],[33]   (62) [16],[17],[24],[34]              
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien 1                        
Principal Amount or Par Value $ 22,456 [19],[21],[25],[26]   $ 22,456 [19],[21],[25],[26]   $ 21,910 [16],[23],[27],[28]              
Spread 2.75% [19],[25],[26],[35]   2.75% [19],[25],[26],[35]   2.75% [16],[27],[28],[36] 2.75% [19],[25],[26],[35] 2.75% [19],[25],[26],[35] 2.75% [16],[27],[28],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 21,266                  
Fair value, ending balance $ 20,210 [19],[25],[26]   20,210 [19],[25],[26]   $ 21,266 [16],[27],[28]              
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien 2                        
Principal Amount or Par Value $ 4,311 [19],[20],[21],[29]   $ 4,311 [19],[20],[21],[29]   $ 4,206 [16],[17],[23],[30]              
Spread 2.75% [19],[20],[29],[35]   2.75% [19],[20],[29],[35]   2.75% [16],[17],[30],[36] 2.75% [19],[20],[29],[35] 2.75% [19],[20],[29],[35] 2.75% [16],[17],[30],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 4,082                  
Fair value, ending balance $ 3,880 [19],[20],[29]   3,880 [19],[20],[29]   $ 4,082 [16],[17],[30]              
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien 3                        
Principal Amount or Par Value $ 3,980 [19],[20],[21],[29]   $ 3,980 [19],[20],[21],[29]   $ 3,884 [16],[17],[23],[30]              
Spread 2.75% [19],[20],[29],[35]   2.75% [19],[20],[29],[35]   2.75% [16],[17],[30],[36] 2.75% [19],[20],[29],[35] 2.75% [19],[20],[29],[35] 2.75% [16],[17],[30],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 3,769                  
Fair value, ending balance $ 3,582 [19],[20],[29]   3,582 [19],[20],[29]   $ 3,769 [16],[17],[30]              
Investment, Identifier [Axis]: ACI Parent Inc., Preferred shares                        
Principal Amount or Par Value 20,249   20,249                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[34]     16,419                  
Fair value, ending balance 10,125 [19],[20],[33]   10,125 [19],[20],[33]   16,419 [16],[17],[34]              
Investment, Identifier [Axis]: AI Altius US Bidco, Inc., First lien                        
Principal Amount or Par Value $ 3,062 [19],[20],[21],[29]   $ 3,062 [19],[20],[21],[29]   $ 3,062 [16],[17],[23],[30]              
Spread 4.75% [19],[20],[29]   4.75% [19],[20],[29]   4.75% [16],[17],[30] 4.75% [19],[20],[29] 4.75% [19],[20],[29] 4.75% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 3,062                  
Fair value, ending balance $ 3,062 [19],[20],[29]   3,062 [19],[20],[29]   $ 3,062 [16],[17],[30]              
Investment, Identifier [Axis]: AI Altius US Bidco, Inc., First lien - Undrawn                        
Principal Amount or Par Value 3,077 [19],[20],[21],[22]   3,077 [19],[20],[21],[22]   3,077 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Accelya Lux Finco S.a.r.l., First lien                        
Principal Amount or Par Value [20],[21],[37] $ 9,552   $ 9,552                  
Spread [20],[37] 5.25%   5.25%     5.25% 5.25%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [20],[37] $ 9,361   $ 9,361                  
Investment, Identifier [Axis]: Acumatica Holdings, Inc., First lien                        
Principal Amount or Par Value [19],[20],[21],[29] $ 39,188   $ 39,188                  
Spread [19],[20],[29] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 39,188   $ 39,188                  
Investment, Identifier [Axis]: Acumatica Holdings, Inc., First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 9,403   9,403                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Adelaide Borrower, LLC, First lien                        
Principal Amount or Par Value $ 4,739 [19],[20],[21],[29],[37]   $ 4,739 [19],[20],[21],[29],[37]   $ 4,698 [16],[17],[23],[30],[38]              
Spread 3.38% [19],[20],[29],[35],[37]   3.38% [19],[20],[29],[35],[37]   6.25% [16],[17],[30],[38] 3.38% [19],[20],[29],[35],[37] 3.38% [19],[20],[29],[35],[37] 6.25% [16],[17],[30],[38]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30],[38]     $ 4,698                  
Fair value, ending balance $ 4,739 [19],[20],[29],[37]   4,739 [19],[20],[29],[37]   $ 4,698 [16],[17],[30],[38]              
Investment, Identifier [Axis]: Adelaide Borrower, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [16],[17],[23],[24]         1,048              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Adelaide Borrower, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] 1,048   1,048                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Adelaide Borrower, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value 667 [19],[20],[21],[22]   667 [19],[20],[21],[22]   667 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Alegeus Technologies Holdings Corp. First lien                        
Principal Amount or Par Value [19],[20],[21],[29] $ 8,414   $ 8,414                  
Spread [19],[20],[29] 6.75%   6.75%     6.75% 6.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 8,309   $ 8,309                  
Investment, Identifier [Axis]: Alegeus Technologies Holdings Corp., First lien                        
Principal Amount or Par Value [16],[17],[23],[30]         $ 8,510              
Spread [16],[17],[30]         6.75%     6.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 8,404                  
Fair value, ending balance [16],[17],[30]         $ 8,404              
Investment, Identifier [Axis]: Ambrosia Holdco Corp., First lien                        
Number of investments held | investment 2   2   2 2 2 2        
Investment, Identifier [Axis]: Ambrosia Holdco Corp., Ordinary shares 1                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[28]     $ 1,348                  
Fair value, ending balance [16],[28]         $ 1,348              
Investment, Identifier [Axis]: Ambrosia Holdco Corp., Ordinary shares 2                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     1,300                  
Fair value, ending balance [16],[17]         1,300              
Investment, Identifier [Axis]: Ambrosia Topco LLC, Class A-1 common units 1                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[26] $ 590   590                  
Investment, Identifier [Axis]: Ambrosia Topco LLC, Class A-1 common units 2                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20] 569   569                  
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24]         1,969              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 1,969   1,969                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (23)   (23)                  
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien 1                        
Principal Amount or Par Value $ 18,818 [19],[20],[21],[29]   $ 18,818 [19],[20],[21],[29]   $ 18,964 [16],[23],[27],[28]              
Spread 5.50% [19],[20],[29]   5.50% [19],[20],[29]   5.25% [16],[27],[28] 5.50% [19],[20],[29] 5.50% [19],[20],[29] 5.25% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 18,964                  
Fair value, ending balance $ 18,603 [19],[20],[29]   18,603 [19],[20],[29]   $ 18,964 [16],[27],[28]              
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien 2                        
Principal Amount or Par Value $ 5,237 [19],[21],[25],[26]   $ 5,237 [19],[21],[25],[26]   $ 5,277 [16],[23],[27],[28]              
Spread 5.50% [19],[25],[26]   5.50% [19],[25],[26]   5.25% [16],[27],[28] 5.50% [19],[25],[26] 5.50% [19],[25],[26] 5.25% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 5,277                  
Fair value, ending balance $ 5,176 [19],[25],[26]   5,176 [19],[25],[26]   $ 5,277 [16],[27],[28]              
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien 3                        
Principal Amount or Par Value $ 688 [19],[20],[21],[29]   $ 688 [19],[20],[21],[29]   $ 693 [16],[17],[23],[30]              
Spread 5.50% [19],[20],[29]   5.50% [19],[20],[29]   5.25% [16],[17],[30] 5.50% [19],[20],[29] 5.50% [19],[20],[29] 5.25% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 693                  
Fair value, ending balance $ 680 [19],[20],[29]   680 [19],[20],[29]   $ 693 [16],[17],[30]              
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien                        
Principal Amount or Par Value $ 31,406   $ 31,406                  
Number of investments held | investment 2   2   2 2 2 2        
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien - Undrawn                        
Principal Amount or Par Value [15],[16],[17],[23],[24]         $ 2,652              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [15],[16],[17],[24]     $ 0                  
Fair value, ending balance [15],[16],[17],[24]         0              
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien - Undrawn                        
Principal Amount or Par Value [18],[19],[20],[21],[22] $ 2,652   2,652                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [18],[19],[20],[22] 0   0                  
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien 1                        
Principal Amount or Par Value $ 29,879 [19],[21],[26]   $ 29,879 [19],[21],[26]   $ 29,879 [16],[23],[28]              
Spread 0.50% [19],[26],[35],[39]   0.50% [19],[26],[35],[39]   0.50% [16],[28],[36],[40] 0.50% [19],[26],[35],[39] 0.50% [19],[26],[35],[39] 0.50% [16],[28],[36],[40]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[28]     $ 17,999                  
Fair value, ending balance $ 17,999 [19],[26]   17,999 [19],[26]   $ 17,999 [16],[28]              
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien 2                        
Principal Amount or Par Value $ 1,527 [19],[20],[21]   $ 1,527 [19],[20],[21]   $ 1,527 [16],[17],[23]              
Spread 0.50% [19],[20],[35],[39]   0.50% [19],[20],[35],[39]   0.50% [16],[17],[36],[40] 0.50% [19],[20],[35],[39] 0.50% [19],[20],[35],[39] 0.50% [16],[17],[36],[40]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     $ 0                  
Fair value, ending balance $ 0 [19],[20]   0 [19],[20]   $ 0 [16],[17]              
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien, Non-accrual status                        
Principal Amount or Par Value                 $ 17,927 $ 13,479    
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), Non-accrual status                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance 17,999   17,999                  
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), Subordinated                        
Principal Amount or Par Value 5,230 [19],[20],[21]   5,230 [19],[20],[21]   5,230 [16],[17],[23]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     0                  
Fair value, ending balance 0 [19],[20]   0 [19],[20]   0 [16],[17]              
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), Subordinated, Non-accrual status                        
Principal Amount or Par Value                     $ 5,230  
Investment, Identifier [Axis]: Anaplan, Inc., First lien                        
Principal Amount or Par Value $ 10,539 [19],[20],[21],[29]   $ 10,539 [19],[20],[21],[29]   $ 10,618 [16],[17],[23],[30]              
Spread 4.50% [19],[20],[29]   4.50% [19],[20],[29]   5.25% [16],[17],[30] 4.50% [19],[20],[29] 4.50% [19],[20],[29] 5.25% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 10,618                  
Fair value, ending balance $ 10,539 [19],[20],[29]   10,539 [19],[20],[29]   $ 10,618 [16],[17],[30]              
Investment, Identifier [Axis]: Ancora Acquisition LLC, Preferred shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[41]     0                  
Fair value, ending balance 0 [19],[42]   0 [19],[42]   0 [16],[41]              
Investment, Identifier [Axis]: Associations, Inc., First lien                        
Principal Amount or Par Value $ 49,057 [19],[20],[21],[29]   $ 49,057 [19],[20],[21],[29]   $ 49,430 [16],[17],[23],[30]              
Spread 6.50% [19],[20],[29]   6.50% [19],[20],[29]   6.50% [16],[17],[30] 6.50% [19],[20],[29] 6.50% [19],[20],[29] 6.50% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 49,430                  
Fair value, ending balance $ 49,057 [19],[20],[29]   49,057 [19],[20],[29]   $ 49,430 [16],[17],[30]              
Investment, Identifier [Axis]: Associations, Inc., First lien - Drawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         $ 641              
Spread [16],[17],[24]         6.50%     6.50%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     641                  
Fair value, ending balance [16],[17],[24]         $ 641              
Investment, Identifier [Axis]: Associations, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         3,200              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Associations, Inc., First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22] $ 1,450   $ 1,450                  
Spread [19],[20],[22] 6.50%   6.50%     6.50% 6.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 1,450   $ 1,450                  
Investment, Identifier [Axis]: Associations, Inc., First lien - Drawn 1                        
Principal Amount or Par Value [16],[17],[23],[24]         $ 1,539              
Spread [16],[17],[24]         6.50%     6.50%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     1,539                  
Fair value, ending balance [16],[17],[24]         $ 1,539              
Investment, Identifier [Axis]: Associations, Inc., First lien - Undrawn 1                        
Principal Amount or Par Value 2,380 [19],[20],[21],[22]   2,380 [19],[20],[21],[22]   1,539 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Associations, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 3,077   3,077                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Associations, Inc., Subordinated 1                        
Principal Amount or Par Value 8,851 [19],[20],[21]   8,851 [19],[20],[21]   7,959 [16],[17],[23]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     7,959                  
Fair value, ending balance 9,028 [19],[20]   9,028 [19],[20]   7,959 [16],[17]              
Investment, Identifier [Axis]: Associations, Inc., Subordinated 2                        
Principal Amount or Par Value 3,380 [19],[20],[21]   3,380 [19],[20],[21]   3,039 [16],[17],[23]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     3,039                  
Fair value, ending balance 3,515 [19],[20]   3,515 [19],[20]   3,039 [16],[17]              
Investment, Identifier [Axis]: Aston FinCo S.a r.l. / Aston US Finco, LLC, Second lien                        
Principal Amount or Par Value [16],[17],[23],[30],[38]         $ 34,459              
Spread [16],[17],[30],[38]         8.25%     8.25%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30],[38]     34,459                  
Fair value, ending balance [16],[17],[30],[38]         $ 34,459              
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd, First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24],[38]         320              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[38]     0                  
Fair value, ending balance [16],[17],[24],[38]         0              
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd, First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22],[37] 790   790                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22],[37] 0   0                  
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd, First lien 1                        
Principal Amount or Par Value $ 4,474 [19],[21],[25],[26]   $ 4,474 [19],[21],[25],[26]   $ 3,445 [16],[17],[23],[30]              
Spread 5.00% [19],[25],[26]   5.00% [19],[25],[26]   5.00% [16],[17],[30] 5.00% [19],[25],[26] 5.00% [19],[25],[26] 5.00% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 3,445                  
Fair value, ending balance $ 4,474 [19],[25],[26]   4,474 [19],[25],[26]   $ 3,445 [16],[17],[30]              
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd, First lien 2                        
Principal Amount or Par Value $ 3,419 [19],[20],[21],[29]   $ 3,419 [19],[20],[21],[29]   $ 1,342 [16],[17],[23],[30]              
Spread 5.00% [19],[20],[29]   5.00% [19],[20],[29]   5.00% [16],[17],[30] 5.00% [19],[20],[29] 5.00% [19],[20],[29] 5.00% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 1,342                  
Fair value, ending balance $ 3,419 [19],[20],[29]   3,419 [19],[20],[29]   $ 1,342 [16],[17],[30]              
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd, First lien 3                        
Principal Amount or Par Value [19],[20],[21],[29] $ 1,332   $ 1,332                  
Spread [19],[20],[29] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 1,332   $ 1,332                  
Investment, Identifier [Axis]: Auctane Inc. (fka Stamps.com Inc.), First lien                        
Principal Amount or Par Value [19],[20],[21],[29] $ 36,155   $ 36,155                  
Spread [19],[20],[29] 5.75%   5.75%     5.75% 5.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 35,522   $ 35,522                  
Investment, Identifier [Axis]: Auctane Inc. (fka Stamps.com Inc.), First lien 1                        
Principal Amount or Par Value [16],[17],[23],[30]         $ 21,624              
Spread [16],[17],[30]         5.75%     5.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     21,138                  
Fair value, ending balance [16],[17],[30]         $ 21,138              
Investment, Identifier [Axis]: Auctane Inc. (fka Stamps.com Inc.), First lien 2                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 14,624              
Spread [16],[27],[28]         5.75%     5.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     14,295                  
Fair value, ending balance [16],[27],[28]         $ 14,295              
Investment, Identifier [Axis]: Avalara, Inc., First lien                        
Principal Amount or Par Value [16],[17],[23],[30]         $ 17,198              
Spread [16],[17],[30]         6.25%     6.25%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     17,198                  
Fair value, ending balance [16],[17],[30]         $ 17,198              
Investment, Identifier [Axis]: Avalara, Inc., First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24]         1,720              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         $ 0              
Investment, Identifier [Axis]: Bach Special Limited (Bach Preference Limited), Preferred shares                        
Spread [17],[30],[38]         11.75%     11.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [17],[30],[38]     13,867                  
Fair value, ending balance [17],[30],[38]         $ 13,867              
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien                        
Principal Amount or Par Value [16],[17],[23],[30]         $ 13,687              
Spread [16],[17],[30]         4.75%     4.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     13,585                  
Fair value, ending balance [16],[17],[30]         $ 13,585              
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien - Undrawn 1                        
Principal Amount or Par Value 2,122 [19],[20],[21],[22]   2,122 [19],[20],[21],[22]   2,065 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (15)                  
Fair value, ending balance (11) [19],[20],[22]   (11) [19],[20],[22]   (15) [16],[17],[24]              
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien - Undrawn 2                        
Principal Amount or Par Value 3,707 [19],[20],[21],[22]   3,707 [19],[20],[21],[22]   2,894 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (22)                  
Fair value, ending balance (19) [19],[20],[22]   (19) [19],[20],[22]   (22) [16],[17],[24]              
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien 1                        
Principal Amount or Par Value [19],[20],[21],[29] $ 15,642   $ 15,642                  
Spread [19],[20],[29] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 15,642   $ 15,642                  
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien 2                        
Principal Amount or Par Value [19],[21],[25],[26] $ 5,782   $ 5,782                  
Spread [19],[25],[26] 4.50%   4.50%     4.50% 4.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 5,753   $ 5,753                  
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien 3                        
Principal Amount or Par Value [19],[20],[21],[29] $ 378   $ 378                  
Spread [19],[20],[29] 4.50%   4.50%     4.50% 4.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 376   $ 376                  
Investment, Identifier [Axis]: Bamboo Health Holdings, LLC (f/k/a Appriss Health, LLC), First lien                        
Principal Amount or Par Value $ 3,046 [19],[20],[21],[29]   $ 3,046 [19],[20],[21],[29]   $ 6,109 [16],[17],[23],[30],[43]              
Spread 4.75% [19],[20],[29]   4.75% [19],[20],[29]   7.00% [16],[17],[30],[43] 4.75% [19],[20],[29] 4.75% [19],[20],[29] 7.00% [16],[17],[30],[43]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30],[43]     $ 6,109                  
Fair value, ending balance $ 3,046 [19],[20],[29]   3,046 [19],[20],[29]   $ 6,109 [16],[17],[30],[43]              
Investment, Identifier [Axis]: Bamboo Health Holdings, LLC (f/k/a Appriss Health, LLC), First lien - Undrawn                        
Principal Amount or Par Value 417 [19],[20],[21],[22]   417 [19],[20],[21],[22]   417 [16],[17],[23],[24],[43]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[43]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24],[43]              
Investment, Identifier [Axis]: Bamboo Health Intermediate Holdings (fka Appriss Health Intermediate Holdings, Inc.), Preferred shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[43]     3,371                  
Fair value, ending balance [16],[17],[43]         3,371              
Investment, Identifier [Axis]: Beacon Pointe Harmony, LLC, First lien - Drawn                        
Principal Amount or Par Value $ 464 [19],[20],[21],[22]   $ 464 [19],[20],[21],[22]   $ 467 [16],[17],[23],[24]              
Spread 4.75% [19],[20],[22]   4.75% [19],[20],[22]   4.75% [16],[17],[24] 4.75% [19],[20],[22] 4.75% [19],[20],[22] 4.75% [16],[17],[24]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     $ 467                  
Fair value, ending balance $ 464 [19],[20],[22]   464 [19],[20],[22]   $ 467 [16],[17],[24]              
Investment, Identifier [Axis]: Beacon Pointe Harmony, LLC, First lien - Undrawn                        
Principal Amount or Par Value 1,685 [19],[20],[21],[22]   1,685 [19],[20],[21],[22]   1,685 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Bonterra LLC, First lien                        
Principal Amount or Par Value [19],[20],[21],[29] $ 15,027   $ 15,027                  
Spread [19],[20],[29] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 14,990   $ 14,990                  
Investment, Identifier [Axis]: Bonterra LLC, First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22] $ 244   $ 244                  
Spread [19],[20],[22] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 244   $ 244                  
Investment, Identifier [Axis]: Bonterra LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] 1,384   1,384                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (3)   (3)                  
Investment, Identifier [Axis]: Bonterra LLC, First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 1,629   1,629                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (4)   (4)                  
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Drawn 1                        
Principal Amount or Par Value [16],[23],[24],[44]         $ 1,319              
Spread [16],[24],[44]         5.00%     5.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[24],[44]     1,319                  
Fair value, ending balance [16],[24],[44]         $ 1,319              
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Drawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         $ 516              
Spread [16],[17],[24]         5.00%     5.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     516                  
Fair value, ending balance [16],[17],[24]         $ 516              
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 1,594   1,594                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Undrawn 1                        
Principal Amount or Par Value [16],[17],[23],[24]         376              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         1,594              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Undrawn 3                        
Principal Amount or Par Value [16],[23],[24],[44]         963              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[24],[44]     0                  
Fair value, ending balance [16],[24],[44]         0              
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien 1                        
Principal Amount or Par Value $ 19,868 [19],[21],[45]   $ 19,868 [19],[21],[45]   $ 20,019 [16],[23],[44]              
Spread 5.00% [19],[45]   5.00% [19],[45]   5.00% [16],[44] 5.00% [19],[45] 5.00% [19],[45] 5.00% [16],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 20,019                  
Fair value, ending balance $ 19,868 [19],[45]   19,868 [19],[45]   $ 20,019 [16],[44]              
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien 2                        
Principal Amount or Par Value $ 7,768 [19],[21],[25],[26]   $ 7,768 [19],[21],[25],[26]   $ 7,827 [16],[23],[27],[28]              
Spread 5.00% [19],[25],[26]   5.00% [19],[25],[26]   5.00% [16],[27],[28] 5.00% [19],[25],[26] 5.00% [19],[25],[26] 5.00% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 7,827                  
Fair value, ending balance $ 7,768 [19],[25],[26]   7,768 [19],[25],[26]   $ 7,827 [16],[27],[28]              
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien 3                        
Principal Amount or Par Value [19],[21],[45] $ 1,309   $ 1,309                  
Spread [19],[45] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[45] $ 1,309   $ 1,309                  
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien 4                        
Principal Amount or Par Value [19],[20],[21] $ 512   $ 512                  
Spread [19],[20] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20] $ 512   $ 512                  
Investment, Identifier [Axis]: Bullhorn, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         935              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Bullhorn, Inc., First lien - Drawn                        
Principal Amount or Par Value $ 125 [19],[20],[21],[22]   $ 125 [19],[20],[21],[22]   $ 417 [16],[17],[23],[24]              
Spread 5.00% [19],[20],[22]   5.00% [19],[20],[22]   5.00% [16],[17],[24] 5.00% [19],[20],[22] 5.00% [19],[20],[22] 5.00% [16],[17],[24]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     $ 417                  
Fair value, ending balance $ 125 [19],[20],[22]   125 [19],[20],[22]   $ 417 [16],[17],[24]              
Investment, Identifier [Axis]: Bullhorn, Inc., First lien - Undrawn 1                        
Principal Amount or Par Value 822 [19],[20],[21],[22]   822 [19],[20],[21],[22]   1,847 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Bullhorn, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 811   811                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 1                        
Principal Amount or Par Value $ 13,206 [19],[21],[25],[26]   $ 13,206 [19],[21],[25],[26]   $ 13,206 [16],[23],[27],[28]              
Spread 5.00% [19],[25],[26]   5.00% [19],[25],[26]   5.00% [16],[27],[28] 5.00% [19],[25],[26] 5.00% [19],[25],[26] 5.00% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 13,206                  
Fair value, ending balance $ 13,206 [19],[25],[26]   13,206 [19],[25],[26]   $ 13,206 [16],[27],[28]              
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 2                        
Principal Amount or Par Value $ 8,879 [19],[20],[21],[29]   $ 8,879 [19],[20],[21],[29]   $ 8,462 [16],[17],[23],[30]              
Spread 5.00% [19],[20],[29]   5.00% [19],[20],[29]   5.00% [16],[17],[30] 5.00% [19],[20],[29] 5.00% [19],[20],[29] 5.00% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 8,462                  
Fair value, ending balance $ 8,879 [19],[20],[29]   8,879 [19],[20],[29]   $ 8,462 [16],[17],[30]              
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 3                        
Principal Amount or Par Value $ 3,398 [19],[21],[25],[26]   $ 3,398 [19],[21],[25],[26]   $ 3,398 [16],[23],[27],[28]              
Spread 5.00% [19],[25],[26]   5.00% [19],[25],[26]   5.00% [16],[27],[28] 5.00% [19],[25],[26] 5.00% [19],[25],[26] 5.00% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 3,398                  
Fair value, ending balance $ 3,398 [19],[25],[26]   3,398 [19],[25],[26]   $ 3,398 [16],[27],[28]              
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 4                        
Principal Amount or Par Value $ 1,025 [19],[20],[21],[29]   $ 1,025 [19],[20],[21],[29]   $ 761 [16],[23],[27],[28]              
Spread 5.00% [19],[20],[29]   5.00% [19],[20],[29]   5.00% [16],[27],[28] 5.00% [19],[20],[29] 5.00% [19],[20],[29] 5.00% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 761                  
Fair value, ending balance $ 1,025 [19],[20],[29]   1,025 [19],[20],[29]   $ 761 [16],[27],[28]              
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 5                        
Principal Amount or Par Value $ 761 [19],[21],[25],[26]   $ 761 [19],[21],[25],[26]   $ 341 [16],[23],[27],[28]              
Spread 5.00% [19],[25],[26]   5.00% [19],[25],[26]   5.00% [16],[27],[28] 5.00% [19],[25],[26] 5.00% [19],[25],[26] 5.00% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 341                  
Fair value, ending balance $ 761 [19],[25],[26]   761 [19],[25],[26]   $ 341 [16],[27],[28]              
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 6                        
Principal Amount or Par Value $ 341 [19],[21],[25],[26]   $ 341 [19],[21],[25],[26]   $ 272 [16],[23],[27],[28]              
Spread 5.00% [19],[25],[26]   5.00% [19],[25],[26]   5.00% [16],[27],[28] 5.00% [19],[25],[26] 5.00% [19],[25],[26] 5.00% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 272                  
Fair value, ending balance $ 341 [19],[25],[26]   341 [19],[25],[26]   $ 272 [16],[27],[28]              
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 7                        
Principal Amount or Par Value [19],[21],[25],[26] $ 272   $ 272                  
Spread [19],[25],[26] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 272   $ 272                  
Investment, Identifier [Axis]: CB Buyer, Inc., First lien                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 3,308              
Spread [16],[27],[28]         5.25%     5.25%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     3,292                  
Fair value, ending balance [16],[27],[28]         $ 3,292              
Investment, Identifier [Axis]: CB Buyer, Inc., First lien - Undrawn 1                        
Principal Amount or Par Value [16],[17],[23],[24]         364              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (2)                  
Fair value, ending balance [16],[17],[24]         (2)              
Investment, Identifier [Axis]: CB Buyer, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         934              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (5)                  
Fair value, ending balance [16],[17],[24]         (5)              
Investment, Identifier [Axis]: CFS Management, LLC, First lien 1                        
Principal Amount or Par Value $ 11,997 [19],[20],[21],[29]   $ 11,997 [19],[20],[21],[29]   $ 11,881 [16],[23],[27],[28]              
Spread 6.25% [19],[20],[29],[35]   6.25% [19],[20],[29],[35]   6.25% [16],[27],[28],[36] 6.25% [19],[20],[29],[35] 6.25% [19],[20],[29],[35] 6.25% [16],[27],[28],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 10,693                  
Fair value, ending balance $ 10,497 [19],[20],[29]   10,497 [19],[20],[29]   $ 10,693 [16],[27],[28]              
Investment, Identifier [Axis]: CFS Management, LLC, First lien 2                        
Principal Amount or Par Value $ 3,574 [19],[21],[25],[26]   $ 3,574 [19],[21],[25],[26]   $ 3,539 [16],[23],[27],[28]              
Spread 6.25% [19],[25],[26],[35]   6.25% [19],[25],[26],[35]   6.25% [16],[27],[28],[36] 6.25% [19],[25],[26],[35] 6.25% [19],[25],[26],[35] 6.25% [16],[27],[28],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 3,185                  
Fair value, ending balance $ 3,127 [19],[25],[26]   3,127 [19],[25],[26]   $ 3,185 [16],[27],[28]              
Investment, Identifier [Axis]: CG Group Holdings, LLC, First lien                        
Principal Amount or Par Value $ 8,559 [19],[21],[25],[26]   $ 8,559 [19],[21],[25],[26]   $ 8,493 [16],[23],[27],[28]              
Spread 6.75% [19],[25],[26],[35]   6.75% [19],[25],[26],[35]   6.75% [16],[27],[28],[36] 6.75% [19],[25],[26],[35] 6.75% [19],[25],[26],[35] 6.75% [16],[27],[28],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 8,449                  
Fair value, ending balance $ 8,559 [19],[25],[26]   8,559 [19],[25],[26]   $ 8,449 [16],[27],[28]              
Investment, Identifier [Axis]: CG Group Holdings, LLC, First lien - Drawn                        
Principal Amount or Par Value $ 1,084 [19],[20],[21],[22],[29]   $ 1,084 [19],[20],[21],[22],[29]   $ 954 [16],[17],[23],[24],[30]              
Spread 6.75% [19],[20],[22],[29],[35]   6.75% [19],[20],[22],[29],[35]   6.75% [16],[17],[24],[30],[36] 6.75% [19],[20],[22],[29],[35] 6.75% [19],[20],[22],[29],[35] 6.75% [16],[17],[24],[30],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[30]     $ 950                  
Fair value, ending balance $ 1,084 [19],[20],[22],[29]   1,084 [19],[20],[22],[29]   $ 950 [16],[17],[24],[30]              
Investment, Identifier [Axis]: CG Group Holdings, LLC, First lien - Undrawn                        
Principal Amount or Par Value 113 [19],[20],[21],[22]   113 [19],[20],[21],[22]   226 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (1)                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   (1) [16],[17],[24]              
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., First lien                        
Principal Amount or Par Value $ 6,467 [19],[21],[25],[26]   $ 6,467 [19],[21],[25],[26]   $ 6,516 [16],[23],[27],[28]              
Spread 4.75% [19],[25],[26]   4.75% [19],[25],[26]   5.00% [16],[27],[28] 4.75% [19],[25],[26] 4.75% [19],[25],[26] 5.00% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 6,483                  
Fair value, ending balance $ 6,467 [19],[25],[26]   6,467 [19],[25],[26]   $ 6,483 [16],[27],[28]              
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., First lien - Drawn                        
Principal Amount or Par Value [16],[17],[23],[24],[30]         $ 489              
Spread [16],[17],[24],[30]         5.00%     5.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[30]     486                  
Fair value, ending balance [16],[17],[24],[30]         $ 486              
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., First lien - Undrawn 1                        
Principal Amount or Par Value 1,629 [19],[20],[21],[22]   1,629 [19],[20],[21],[22]   597 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (3)                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   (3) [16],[17],[24]              
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value 1,086 [19],[20],[21],[22]   1,086 [19],[20],[21],[22]   1,629 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (8)                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   (8) [16],[17],[24]              
Investment, Identifier [Axis]: Calabrio, Inc., First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24]         850              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Calabrio, Inc., First lien - Drawn                        
Principal Amount or Par Value $ 637 [20],[21],[22]   $ 637 [20],[21],[22]   $ 637 [16],[17],[23],[24]              
Spread 5.50% [20],[22]   5.50% [20],[22]   5.50% [16],[17],[24] 5.50% [20],[22] 5.50% [20],[22] 5.50% [16],[17],[24]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     $ 637                  
Fair value, ending balance $ 637 [20],[22]   637 [20],[22]   $ 637 [16],[17],[24]              
Investment, Identifier [Axis]: Calabrio, Inc., First lien - Undrawn                        
Principal Amount or Par Value [20],[21],[22] 850   850                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [20],[22] 0   0                  
Investment, Identifier [Axis]: Calabrio, Inc., First lien 1                        
Principal Amount or Par Value $ 12,193 [21],[45]   $ 12,193 [21],[45]   $ 12,286 [16],[23],[44]              
Spread 5.50% [45]   5.50% [45]   5.50% [16],[44] 5.50% [45] 5.50% [45] 5.50% [16],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 12,286                  
Fair value, ending balance $ 12,193 [45]   12,193 [45]   $ 12,286 [16],[44]              
Investment, Identifier [Axis]: Calabrio, Inc., First lien 2                        
Principal Amount or Par Value $ 1,562 [21],[45]   $ 1,562 [21],[45]   $ 1,574 [16],[23],[44]              
Spread 5.50% [45]   5.50% [45]   5.50% [16],[44] 5.50% [45] 5.50% [45] 5.50% [16],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 1,574                  
Fair value, ending balance $ 1,562 [45]   1,562 [45]   $ 1,574 [16],[44]              
Investment, Identifier [Axis]: Cardinal Parent, Inc., First lien                        
Principal Amount or Par Value $ 11,639 [21],[31]   $ 11,639 [21],[31]   $ 11,730 [23],[32]              
Spread 4.50% [31]   4.50% [31]   4.50% [32] 4.50% [31] 4.50% [31] 4.50% [32]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [32]     $ 11,249                  
Fair value, ending balance $ 11,582 [31]   11,582 [31]   $ 11,249 [32]              
Investment, Identifier [Axis]: Cardinal Parent, Inc., Second lien                        
Principal Amount or Par Value $ 9,767 [19],[21],[31]   $ 9,767 [19],[21],[31]   $ 9,767 [16],[23],[32]              
Spread 7.75% [19],[31]   7.75% [19],[31]   7.75% [16],[32] 7.75% [19],[31] 7.75% [19],[31] 7.75% [16],[32]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32]     $ 9,423                  
Fair value, ending balance $ 9,757 [19],[31]   9,757 [19],[31]   $ 9,423 [16],[32]              
Investment, Identifier [Axis]: CentralSquare Technologies, LLC, First lien                        
Principal Amount or Par Value $ 36,475 [19],[21],[25],[26]   $ 36,475 [19],[21],[25],[26]   $ 35,797 [16],[23],[27],[28]              
Spread 2.88% [19],[25],[26],[35]   2.88% [19],[25],[26],[35]   2.88% [16],[27],[28],[36] 2.88% [19],[25],[26],[35] 2.88% [19],[25],[26],[35] 2.88% [16],[27],[28],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 35,797                  
Fair value, ending balance $ 36,475 [19],[25],[26]   36,475 [19],[25],[26]   $ 35,797 [16],[27],[28]              
Investment, Identifier [Axis]: CentralSquare Technologies, LLC, First lien - Undrawn                        
Principal Amount or Par Value 3,980 [19],[20],[21],[22]   3,980 [19],[20],[21],[22]   3,980 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Ciklum Inc., First lien                        
Principal Amount or Par Value [16],[23],[27],[28],[38]         $ 9,536              
Spread [16],[27],[28],[38]         6.50%     6.50%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28],[38]     9,536                  
Fair value, ending balance [16],[27],[28],[38]         $ 9,536              
Investment, Identifier [Axis]: Ciklum Inc., First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22],[37] 2,989   2,989                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22],[37] 0   0                  
Investment, Identifier [Axis]: Ciklum Inc., First lien - Undrawn 1                        
Principal Amount or Par Value [16],[17],[23],[24]         11,955              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Ciklum Inc., First lien - Undrawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         2,989              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Ciklum Inc., First lien 1                        
Principal Amount or Par Value [19],[21],[25],[26] $ 9,464   $ 9,464                  
Spread [19],[25],[26] 6.50%   6.50%     6.50% 6.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 9,464   $ 9,464                  
Investment, Identifier [Axis]: Ciklum Inc., First lien 2                        
Principal Amount or Par Value [19],[20],[21],[29] $ 5,353   $ 5,353                  
Spread [19],[20],[29] 6.50%   6.50%     6.50% 6.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 5,353   $ 5,353                  
Investment, Identifier [Axis]: Cleanova US Holdings, LLC, First lien                        
Principal Amount or Par Value [19],[21],[25],[26],[37] $ 8,406   $ 8,406                  
Spread [19],[25],[26],[37] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26],[37] $ 8,406   $ 8,406                  
Investment, Identifier [Axis]: CommerceHub, Inc., First lien                        
Principal Amount or Par Value [16],[17],[23],[30]         $ 3,920              
Spread [16],[17],[30]         6.25%     6.25%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     3,920                  
Fair value, ending balance [16],[17],[30]         $ 3,920              
Investment, Identifier [Axis]: Community Management Holdings MidCo 2, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] 58   58                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Community Management Holdings MidCo 2, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 611   611                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (5)   (5)                  
Investment, Identifier [Axis]: Community Management Holdings MidCo 2, LLC, First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22],[29] $ 1,237   $ 1,237                  
Spread [19],[20],[22],[29] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22],[29] $ 1,227   $ 1,227                  
Investment, Identifier [Axis]: Compsych Investments Corp., First lien                        
Principal Amount or Par Value $ 7,810 [19],[21],[25],[26]   $ 7,810 [19],[21],[25],[26]   $ 1,164 [16],[23],[27],[28]              
Spread 4.75% [19],[25],[26]   4.75% [19],[25],[26]   4.75% [16],[27],[28] 4.75% [19],[25],[26] 4.75% [19],[25],[26] 4.75% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 1,162                  
Fair value, ending balance $ 7,810 [19],[25],[26]   7,810 [19],[25],[26]   $ 1,162 [16],[27],[28]              
Investment, Identifier [Axis]: Compsych Investments Corp., First lien - Undrawn                        
Principal Amount or Par Value 2,253 [19],[20],[21],[22]   2,253 [19],[20],[21],[22]   333 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (1)                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   (1) [16],[17],[24]              
Investment, Identifier [Axis]: Convey Health Solutions, Inc., First lien 1                        
Principal Amount or Par Value $ 13,431 [19],[20],[21],[29]   $ 13,431 [19],[20],[21],[29]   $ 13,152 [16],[17],[23],[30]              
Spread 1.00% [19],[20],[29],[35]   1.00% [19],[20],[29],[35]   1.00% [16],[17],[30],[36] 1.00% [19],[20],[29],[35] 1.00% [19],[20],[29],[35] 1.00% [16],[17],[30],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 11,935                  
Fair value, ending balance $ 11,266 [19],[20],[29]   11,266 [19],[20],[29]   $ 11,935 [16],[17],[30]              
Investment, Identifier [Axis]: Convey Health Solutions, Inc., First lien 2                        
Principal Amount or Par Value $ 2,243 [19],[20],[21],[29]   $ 2,243 [19],[20],[21],[29]   $ 2,196 [16],[17],[23],[30]              
Spread 1.00% [19],[20],[29],[35]   1.00% [19],[20],[29],[35]   1.00% [16],[17],[30],[36] 1.00% [19],[20],[29],[35] 1.00% [19],[20],[29],[35] 1.00% [16],[17],[30],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 1,993                  
Fair value, ending balance $ 1,881 [19],[20],[29]   1,881 [19],[20],[29]   $ 1,993 [16],[17],[30]              
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC, First lien                        
Principal Amount or Par Value $ 1,042 [19],[20],[21],[29]   $ 1,042 [19],[20],[21],[29]   $ 1,050 [16],[17],[23],[30]              
Spread 5.25% [19],[20],[29]   5.25% [19],[20],[29]   5.25% [16],[17],[30] 5.25% [19],[20],[29] 5.25% [19],[20],[29] 5.25% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 1,050                  
Fair value, ending balance $ 1,042 [19],[20],[29]   1,042 [19],[20],[29]   $ 1,050 [16],[17],[30]              
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC, First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24]         578              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC, First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 578   578                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien                        
Principal Amount or Par Value $ 14,280 [19],[20],[21],[29]   $ 14,280 [19],[20],[21],[29]   $ 14,388 [16],[17],[23],[30]              
Spread 5.25% [19],[20],[29]   5.25% [19],[20],[29]   5.25% [16],[17],[30] 5.25% [19],[20],[29] 5.25% [19],[20],[29] 5.25% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 14,388                  
Fair value, ending balance $ 14,280 [19],[20],[29]   14,280 [19],[20],[29]   $ 14,388 [16],[17],[30]              
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value 1,291 [19],[20],[21],[22]   1,291 [19],[20],[21],[22]   1,291 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value 989 [19],[20],[21],[22]   989 [19],[20],[21],[22]   989 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Cronos Crimson Holdings, Inc. (f/k/a NMC Crimson Holdings, Inc.), First lien 1                        
Principal Amount or Par Value [19],[20],[21],[29] $ 19,259   $ 19,259                  
Spread [19],[20],[29] 6.09%   6.09%     6.09% 6.09%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 19,259   $ 19,259                  
Investment, Identifier [Axis]: Cronos Crimson Holdings, Inc. (f/k/a NMC Crimson Holdings, Inc.), First lien 2                        
Principal Amount or Par Value [19],[20],[21],[29] $ 5,012   $ 5,012                  
Spread [19],[20],[29] 6.09%   6.09%     6.09% 6.09%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 5,012   $ 5,012                  
Investment, Identifier [Axis]: Cronos Crimson Holdings, Inc. (f/k/a NMC Crimson Holdings, Inc.), First lien 3                        
Principal Amount or Par Value [19],[21],[25],[26] $ 4,913   $ 4,913                  
Spread [19],[25],[26] 6.09%   6.09%     6.09% 6.09%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 4,913   $ 4,913                  
Investment, Identifier [Axis]: Cronos Crimson Holdings, Inc. (f/k/a NMC Crimson Holdings, Inc.), First lien 4                        
Principal Amount or Par Value [19],[20],[21],[29] $ 4,706   $ 4,706                  
Spread [19],[20],[29] 6.24%   6.24%     6.24% 6.24%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 4,706   $ 4,706                  
Investment, Identifier [Axis]: DCA Investment Holding, LLC, First lien 1                        
Principal Amount or Par Value 1,839 [19],[21],[25],[26]   1,839 [19],[21],[25],[26]   $ 1,804 [16],[23],[27],[28]              
Spread [16],[27],[28]         6.41%     6.41%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     1,758                  
Fair value, ending balance 1,621 [19],[25],[26]   1,621 [19],[25],[26]   $ 1,758 [16],[27],[28]              
Investment, Identifier [Axis]: DCA Investment Holding, LLC, First lien 2                        
Principal Amount or Par Value 1,031 [19],[20],[21],[29]   1,031 [19],[20],[21],[29]   $ 1,011 [16],[17],[23],[30]              
Spread [16],[17],[30]         6.50%     6.50%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     987                  
Fair value, ending balance 912 [19],[20],[29]   912 [19],[20],[29]   $ 987 [16],[17],[30]              
Investment, Identifier [Axis]: DG Investment Intermediate Holdings 2, Inc., Second lien                        
Principal Amount or Par Value $ 9,512 [19],[20],[21],[29]   $ 9,512 [19],[20],[21],[29]   $ 20,313 [17],[23],[30]              
Spread 5.50% [19],[20],[29]   5.50% [19],[20],[29]   6.75% [17],[30] 5.50% [19],[20],[29] 5.50% [19],[20],[29] 6.75% [17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [17],[30]     $ 20,281                  
Fair value, ending balance $ 9,464 [19],[20],[29]   9,464 [19],[20],[29]   $ 20,281 [17],[30]              
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien - Undrawn                        
Principal Amount or Par Value 2,405 [19],[20],[21],[22]   2,405 [19],[20],[21],[22]   2,405 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (13)                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   (13) [16],[17],[24]              
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien 1                        
Principal Amount or Par Value $ 18,196 [19],[20],[21],[29]   $ 18,196 [19],[20],[21],[29]   $ 18,337 [16],[17],[23],[30]              
Spread 5.75% [19],[20],[29]   5.75% [19],[20],[29]   5.75% [16],[17],[30] 5.75% [19],[20],[29] 5.75% [19],[20],[29] 5.75% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 18,236                  
Fair value, ending balance $ 18,196 [19],[20],[29]   18,196 [19],[20],[29]   $ 18,236 [16],[17],[30]              
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien 2                        
Principal Amount or Par Value $ 6,814 [19],[21],[31]   $ 6,814 [19],[21],[31]   $ 6,867 [16],[23],[32]              
Spread 5.75% [19],[31]   5.75% [19],[31]   5.75% [16],[32] 5.75% [19],[31] 5.75% [19],[31] 5.75% [16],[32]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32]     $ 6,829                  
Fair value, ending balance $ 6,814 [19],[31]   6,814 [19],[31]   $ 6,829 [16],[32]              
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien 3                        
Principal Amount or Par Value [19],[20],[21],[29] $ 3,363   $ 3,363                  
Spread [19],[20],[29] 5.75%   5.75%     5.75% 5.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 3,363   $ 3,363                  
Investment, Identifier [Axis]: DOXA Insurance Holdings LLC, First lien - Undrawn                        
Principal Amount or Par Value 3,046 [19],[20],[21],[22]   3,046 [19],[20],[21],[22]   3,046 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: DT1 Midco Corp, First lien                        
Principal Amount or Par Value [19],[21],[25],[26] $ 1,345   $ 1,345                  
Spread [19],[25],[26] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 1,338   $ 1,338                  
Investment, Identifier [Axis]: DT1 Midco Corp, First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22] $ 32   $ 32                  
Spread [19],[20],[22] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 32   $ 32                  
Investment, Identifier [Axis]: DT1 Midco Corp, First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] 674   674                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (3)   (3)                  
Investment, Identifier [Axis]: DT1 Midco Corp, First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 4,462   4,462                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (22)   (22)                  
Investment, Identifier [Axis]: Daxko Acquisition Corporation, First lien - Undrawn                        
Principal Amount or Par Value 986 [19],[20],[21],[22]   986 [19],[20],[21],[22]   986 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Daxko Acquisition Corporation, First lien 1                        
Principal Amount or Par Value $ 12,779 [19],[20],[21],[29]   $ 12,779 [19],[20],[21],[29]   $ 12,878 [16],[17],[23],[30]              
Spread 4.75% [19],[20],[29]   4.75% [19],[20],[29]   5.00% [16],[17],[30] 4.75% [19],[20],[29] 4.75% [19],[20],[29] 5.00% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 12,878                  
Fair value, ending balance $ 12,779 [19],[20],[29]   12,779 [19],[20],[29]   $ 12,878 [16],[17],[30]              
Investment, Identifier [Axis]: Daxko Acquisition Corporation, First lien 2                        
Principal Amount or Par Value $ 1,077 [19],[21],[25],[26]   $ 1,077 [19],[21],[25],[26]   $ 1,085 [16],[23],[27],[28]              
Spread 4.75% [19],[25],[26]   4.75% [19],[25],[26]   5.00% [16],[27],[28] 4.75% [19],[25],[26] 4.75% [19],[25],[26] 5.00% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 1,085                  
Fair value, ending balance $ 1,077 [19],[25],[26]   1,077 [19],[25],[26]   $ 1,085 [16],[27],[28]              
Investment, Identifier [Axis]: Daxko Acquisition Corporation, First lien 3                        
Principal Amount or Par Value $ 64 [19],[20],[21]   $ 64 [19],[20],[21]   $ 65 [16],[17],[23]              
Spread 4.75% [19],[20]   4.75% [19],[20]   5.00% [16],[17] 4.75% [19],[20] 4.75% [19],[20] 5.00% [16],[17]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     $ 65                  
Fair value, ending balance $ 64 [19],[20]   64 [19],[20]   $ 65 [16],[17]              
Investment, Identifier [Axis]: Dealer Tire Holdings, LLC, Preferred Shares                        
Principal Amount or Par Value 84,739   84,739                  
Investment, Identifier [Axis]: Dealer Tire Holdings, LLC, Preferred shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     79,222                  
Fair value, ending balance 81,078 [19],[20],[29],[46]   81,078 [19],[20],[29],[46]   79,222 [16],[17],[30]              
Investment, Identifier [Axis]: Deca Dental Holdings LLC, First lien - Drawn                        
Principal Amount or Par Value [16],[17],[23],[24],[30]         $ 3,027              
Spread [16],[17],[24],[30]         5.75%     5.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[30]     2,987                  
Fair value, ending balance [16],[17],[24],[30]         $ 2,987              
Investment, Identifier [Axis]: Deca Dental Holdings LLC, First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22],[29] $ 3,027   $ 3,027                  
Spread [19],[20],[22],[29] 5.75%   5.75%     5.75% 5.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22],[29] $ 2,947   $ 2,947                  
Investment, Identifier [Axis]: Deca Dental Holdings LLC, First lien 1                        
Principal Amount or Par Value $ 36,806 [19],[21],[25],[26]   $ 36,806 [19],[21],[25],[26]   $ 37,094 [16],[23],[27],[28]              
Spread 5.75% [19],[25],[26]   5.75% [19],[25],[26]   5.75% [16],[27],[28] 5.75% [19],[25],[26] 5.75% [19],[25],[26] 5.75% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 36,604                  
Fair value, ending balance $ 35,834 [19],[25],[26]   35,834 [19],[25],[26]   $ 36,604 [16],[27],[28]              
Investment, Identifier [Axis]: Deca Dental Holdings LLC, First lien 2                        
Principal Amount or Par Value $ 3,874 [19],[20],[21],[29]   $ 3,874 [19],[20],[21],[29]   $ 3,905 [16],[17],[23],[30]              
Spread 5.75% [19],[20],[29]   5.75% [19],[20],[29]   5.75% [16],[17],[30] 5.75% [19],[20],[29] 5.75% [19],[20],[29] 5.75% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 3,853                  
Fair value, ending balance $ 3,772 [19],[20],[29]   3,772 [19],[20],[29]   $ 3,853 [16],[17],[30]              
Investment, Identifier [Axis]: Denali Intermediate Holdings, Inc., First lien                        
Principal Amount or Par Value [19],[21],[25],[26] $ 9,091   $ 9,091                  
Spread [19],[25],[26] 5.50%   5.50%     5.50% 5.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 9,045   $ 9,045                  
Investment, Identifier [Axis]: Denali Intermediate Holdings, Inc., First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 909   909                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ (5)   $ (5)                  
Investment, Identifier [Axis]: Diamond Parent Holdings Corp, Wholly-owned subsidiaries                        
Number of investments held | investment 2   2   2 2 2 2        
Investment, Identifier [Axis]: Digicert, Inc., First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] $ 1,119   $ 1,119                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (8)   (8)                  
Investment, Identifier [Axis]: Digicert, Inc.., First lien                        
Principal Amount or Par Value [19],[21],[25],[26] $ 15,500   $ 15,500                  
Spread [19],[25],[26] 5.75%   5.75%     5.75% 5.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 15,384   $ 15,384                  
Investment, Identifier [Axis]: Digital Corporation, First Lien                        
Number of investments held | investment 2   2     2 2          
Investment, Identifier [Axis]: Diligent Corporation, First lien                        
Number of investments held | investment         2     2        
Investment, Identifier [Axis]: Diligent Corporation, First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22] $ 249   $ 249                  
Spread [19],[20],[22] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 249   $ 249                  
Investment, Identifier [Axis]: Diligent Corporation, First lien - Undrawn 1                        
Principal Amount or Par Value 2,016 [19],[20],[21],[22]   2,016 [19],[20],[21],[22]   $ 2,265 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Diligent Corporation, First lien - Undrawn 2                        
Principal Amount or Par Value 3,398 [19],[20],[21],[22]   3,398 [19],[20],[21],[22]   3,398 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Diligent Corporation, First lien 1                        
Principal Amount or Par Value $ 19,821 [19],[21],[25],[26]   $ 19,821 [19],[21],[25],[26]   $ 19,821 [16],[23],[27],[28]              
Spread 5.00% [19],[25],[26]   5.00% [19],[25],[26]   5.00% [16],[27],[28] 5.00% [19],[25],[26] 5.00% [19],[25],[26] 5.00% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 19,821                  
Fair value, ending balance $ 19,821 [19],[25],[26]   19,821 [19],[25],[26]   $ 19,821 [16],[27],[28]              
Investment, Identifier [Axis]: Diligent Corporation, First lien 2                        
Principal Amount or Par Value $ 3,398 [19],[20],[21],[29]   $ 3,398 [19],[20],[21],[29]   $ 3,398 [16],[17],[23],[30]              
Spread 5.00% [19],[20],[29]   5.00% [19],[20],[29]   5.00% [16],[17],[30] 5.00% [19],[20],[29] 5.00% [19],[20],[29] 5.00% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 3,398                  
Fair value, ending balance $ 3,398 [19],[20],[29]   3,398 [19],[20],[29]   $ 3,398 [16],[17],[30]              
Investment, Identifier [Axis]: Diligent Preferred Issuer, Inc., Preferred shares                        
Principal Amount or Par Value 15,827   15,827                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[47]     13,609                  
Fair value, ending balance 15,036 [19],[20],[48]   15,036 [19],[20],[48]   13,609 [16],[17],[47]              
Investment, Identifier [Axis]: Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.), First lien 1                        
Principal Amount or Par Value $ 10,628 [8],[19],[21],[25],[26]   $ 10,628 [8],[19],[21],[25],[26]   $ 10,628 [5],[16],[23],[27],[28]              
Spread 7.50% [8],[19],[25],[26]   7.50% [8],[19],[25],[26]   7.50% [5],[16],[27],[28] 7.50% [8],[19],[25],[26] 7.50% [8],[19],[25],[26] 7.50% [5],[16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [5],[16],[27],[28]     $ 10,628                  
Fair value, ending balance $ 10,628 [8],[19],[25],[26]   10,628 [8],[19],[25],[26]   $ 10,628 [5],[16],[27],[28]              
Investment, Identifier [Axis]: Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.), First lien 2                        
Principal Amount or Par Value $ 340 [8],[19],[20],[21]   $ 340 [8],[19],[20],[21]   $ 340 [5],[16],[17],[23]              
Spread 7.50% [8],[19],[20]   7.50% [8],[19],[20]   7.50% [5],[16],[17] 7.50% [8],[19],[20] 7.50% [8],[19],[20] 7.50% [5],[16],[17]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [5],[16],[17]     $ 340                  
Fair value, ending balance $ 340 [8],[19],[20]   340 [8],[19],[20]   $ 340 [5],[16],[17]              
Investment, Identifier [Axis]: Eagle Infrastructure Super HoldCo, LLC, Ordinary shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [5],[16],[17]     8,188                  
Fair value, ending balance 7,368 [8],[19],[20]   7,368 [8],[19],[20]   8,188 [5],[16],[17]              
Investment, Identifier [Axis]: Eclipse Buyer Inc., First lien                        
Principal Amount or Par Value $ 7,113 [19],[21],[31],[49]   $ 7,113 [19],[21],[31],[49]   $ 7,113 [16],[23],[32],[50]              
Spread 4.50% [19],[31],[49]   4.50% [19],[31],[49]   4.75% [16],[32],[50] 4.50% [19],[31],[49] 4.50% [19],[31],[49] 4.75% [16],[32],[50]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32],[50]     $ 7,078                  
Fair value, ending balance $ 7,113 [19],[31],[49]   7,113 [19],[31],[49]   $ 7,078 [16],[32],[50]              
Investment, Identifier [Axis]: Eclipse Buyer Inc., First lien - Undrawn 1                        
Principal Amount or Par Value 1,206 [19],[21],[22],[31]   1,206 [19],[21],[22],[31]   1,206 [16],[23],[24],[32]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[24],[32]     (6)                  
Fair value, ending balance 0 [19],[22],[31]   0 [19],[22],[31]   (6) [16],[24],[32]              
Investment, Identifier [Axis]: Eclipse Buyer Inc., First lien - Undrawn 2                        
Principal Amount or Par Value 4,190 [19],[20],[21],[22]   4,190 [19],[20],[21],[22]   4,190 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (21)                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   (21) [16],[17],[24]              
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.), Ordinary shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     305                  
Fair value, ending balance 305 [19],[20]   305 [19],[20]   305 [16],[17]              
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.), Preferred shares 1                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     2,900                  
Fair value, ending balance [16],[17]         2,900              
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.), Preferred shares 2                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     2,702                  
Fair value, ending balance [16],[17]         2,702              
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.), Series A preferred shares                        
Principal Amount or Par Value 3,335   3,335                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20] 3,335   3,335                  
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.), Series B preferred shares                        
Principal Amount or Par Value 4,116   4,116                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20] 2,703   2,703                  
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc., Junior preferred shares, Non-accrual status                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance 2,703   2,703                  
Investment, Identifier [Axis]: Eclipse Topco, Inc., Preferred shares                        
Principal Amount or Par Value 2,094   2,094                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32],[50]     1,952                  
Fair value, ending balance 2,094 [19],[31],[49]   2,094 [19],[31],[49]   1,952 [16],[32],[50]              
Investment, Identifier [Axis]: Edmentum Ultimate Holdings, LLC, Subordinated                        
Principal Amount or Par Value 25,465 [8],[19],[20],[21],[51]   25,465 [8],[19],[20],[21],[51]   22,290 [5],[16],[17],[23]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [5],[16],[17]     22,290                  
Fair value, ending balance 25,465 [8],[19],[20],[51]   25,465 [8],[19],[20],[51]   $ 22,290 [5],[16],[17]              
Investment, Identifier [Axis]: Einstein Parent, Inc., First lien                        
Principal Amount or Par Value [19],[20],[21],[29] $ 55,582   $ 55,582                  
Spread [19],[20],[29] 6.50%   6.50%     6.50% 6.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 55,026   $ 55,026                  
Investment, Identifier [Axis]: Einstein Parent, Inc., First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 5,750   5,750                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ (57)   $ (57)                  
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien                        
Number of investments held | investment 5   5   3 5 5 3        
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24],[52]         $ 1,400              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[52]     $ 0                  
Fair value, ending balance [16],[17],[24],[52]         0              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] $ 909   909                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value [19],[21],[22],[45] 2,723   2,723                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[22],[45] 0   0                  
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien - Undrawn 3                        
Principal Amount or Par Value [19],[20],[21],[22] 1,400   1,400                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien 1                        
Principal Amount or Par Value $ 8,475 [19],[21],[45]   $ 8,475 [19],[21],[45]   $ 10,185 [16],[23],[44]              
Spread 5.00% [19],[45]   5.00% [19],[45]   5.75% [16],[44] 5.00% [19],[45] 5.00% [19],[45] 5.75% [16],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 10,185                  
Fair value, ending balance $ 8,475 [19],[45]   8,475 [19],[45]   $ 10,185 [16],[44]              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien 2                        
Principal Amount or Par Value $ 4,725 [19],[20],[21],[29]   $ 4,725 [19],[20],[21],[29]   $ 5,677 [16],[17],[23],[30]              
Spread 5.00% [19],[20],[29]   5.00% [19],[20],[29]   6.00% [16],[17],[30] 5.00% [19],[20],[29] 5.00% [19],[20],[29] 6.00% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 5,677                  
Fair value, ending balance $ 4,725 [19],[20],[29]   4,725 [19],[20],[29]   $ 5,677 [16],[17],[30]              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien 3                        
Principal Amount or Par Value $ 2,845 [19],[21],[45]   $ 2,845 [19],[21],[45]   $ 3,419 [16],[23],[44]              
Spread 5.00% [19],[45]   5.00% [19],[45]   5.75% [16],[44] 5.00% [19],[45] 5.00% [19],[45] 5.75% [16],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 3,419                  
Fair value, ending balance $ 2,845 [19],[45]   2,845 [19],[45]   $ 3,419 [16],[44]              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien 4                        
Principal Amount or Par Value $ 2,827 [19],[21],[45]   $ 2,827 [19],[21],[45]   $ 3,397 [16],[23],[44]              
Spread 5.00% [19],[45]   5.00% [19],[45]   5.75% [16],[44] 5.00% [19],[45] 5.00% [19],[45] 5.75% [16],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 3,397                  
Fair value, ending balance $ 2,827 [19],[45]   2,827 [19],[45]   $ 3,397 [16],[44]              
Investment, Identifier [Axis]: FS WhiteWater Holdings, LLC, Ordinary shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44],[52]     4,618                  
Fair value, ending balance 5,000 [19],[45],[53]   5,000 [19],[45],[53]   4,618 [16],[44],[52]              
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc., First lien                        
Principal Amount or Par Value [19],[20],[21],[29] $ 8,150   $ 8,150                  
Spread [19],[20],[29],[35] 2.25%   2.25%     2.25% 2.25%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 8,130   $ 8,130                  
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc., First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22] $ 733   $ 733                  
Spread [19],[20],[22] 4.50%   4.50%     4.50% 4.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 731   $ 731                  
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc., First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] 1,422   1,422                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (4)   (4)                  
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 4,005   4,005                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (10)   (10)                  
Investment, Identifier [Axis]: Firebird Co-Invest L.P., LP Interest                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[54] 3,358   3,358                  
Investment, Identifier [Axis]: Flash Charm Inc. (fka Idera, Inc.), Second lien 1                        
Principal Amount or Par Value [19],[21],[31] $ 10,719   $ 10,719                  
Spread [19],[31] 6.75%   6.75%     6.75% 6.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[31] $ 9,248   $ 9,248                  
Investment, Identifier [Axis]: Flash Charm Inc. (fka Idera, Inc.), Second lien 2                        
Principal Amount or Par Value [19],[20],[21],[29] $ 1,429   $ 1,429                  
Spread [19],[20],[29] 6.75%   6.75%     6.75% 6.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 1,233   $ 1,233                  
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien - Drawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] $ 386   $ 386                  
Spread [19],[20],[22] 5.25%   5.25%     5.25% 5.25%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 386   $ 386                  
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien - Drawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] $ 277   $ 277                  
Spread [19],[20],[22] 5.25%   5.25%     5.25% 5.25%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 277   $ 277                  
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value 2,924 [19],[20],[21],[22]   2,924 [19],[20],[21],[22]   3,312 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value 2,034 [19],[20],[21],[22]   2,034 [19],[20],[21],[22]   2,095 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien 1                        
Principal Amount or Par Value $ 36,905 [19],[21],[25],[26]   $ 36,905 [19],[21],[25],[26]   $ 33,356 [16],[23],[27],[28]              
Spread 5.25% [19],[25],[26]   5.25% [19],[25],[26]   5.25% [16],[27],[28] 5.25% [19],[25],[26] 5.25% [19],[25],[26] 5.25% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 33,356                  
Fair value, ending balance $ 36,905 [19],[25],[26]   36,905 [19],[25],[26]   $ 33,356 [16],[27],[28]              
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien 2                        
Principal Amount or Par Value $ 4,043 [19],[20],[21],[29]   $ 4,043 [19],[20],[21],[29]   $ 4,075 [16],[17],[23],[30]              
Spread 5.25% [19],[20],[29]   5.25% [19],[20],[29]   5.25% [16],[17],[30] 5.25% [19],[20],[29] 5.25% [19],[20],[29] 5.25% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 4,075                  
Fair value, ending balance $ 4,043 [19],[20],[29]   4,043 [19],[20],[29]   $ 4,075 [16],[17],[30]              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22],[29] $ 715   $ 715                  
Spread [19],[20],[22],[29] 5.50%   5.50%     5.50% 5.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22],[29] $ 715   $ 715                  
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Drawn 1                        
Principal Amount or Par Value [16],[17],[23],[24]         $ 1,001              
Spread [16],[17],[24]         5.50%     5.50%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     1,001                  
Fair value, ending balance [16],[17],[24]         $ 1,001              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Drawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         $ 342              
Spread [16],[17],[24]         5.50%     5.50%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     342                  
Fair value, ending balance [16],[17],[24]         $ 342              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 2,145   2,145                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [16],[17],[23],[24]         3,360              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         1,859              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien 1                        
Principal Amount or Par Value $ 17,043 [19],[21],[25],[26]   $ 17,043 [19],[21],[25],[26]   $ 17,176 [16],[23],[27],[28]              
Spread 5.50% [19],[25],[26]   5.50% [19],[25],[26]   5.50% [16],[27],[28] 5.50% [19],[25],[26] 5.50% [19],[25],[26] 5.50% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 17,176                  
Fair value, ending balance $ 17,043 [19],[25],[26]   17,043 [19],[25],[26]   $ 17,176 [16],[27],[28]              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien 2                        
Principal Amount or Par Value $ 12,267 [19],[20],[21],[29]   $ 12,267 [19],[20],[21],[29]   $ 12,020 [16],[17],[23],[30]              
Spread 5.50% [19],[20],[29]   5.50% [19],[20],[29]   5.50% [16],[17],[30] 5.50% [19],[20],[29] 5.50% [19],[20],[29] 5.50% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 12,020                  
Fair value, ending balance $ 12,267 [19],[20],[29]   12,267 [19],[20],[29]   $ 12,020 [16],[17],[30]              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien 3                        
Principal Amount or Par Value $ 974 [19],[20],[21],[29]   $ 974 [19],[20],[21],[29]   $ 80 [16],[17],[23]              
Spread 5.50% [19],[20],[29]   5.50% [19],[20],[29]   5.50% [16],[17] 5.50% [19],[20],[29] 5.50% [19],[20],[29] 5.50% [16],[17]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     $ 80                  
Fair value, ending balance $ 974 [19],[20],[29]   974 [19],[20],[29]   $ 80 [16],[17]              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien 4                        
Principal Amount or Par Value [19],[20],[21] $ 79   $ 79                  
Spread [19],[20] 5.50%   5.50%     5.50% 5.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20] $ 79   $ 79                  
Investment, Identifier [Axis]: Foundational Education Group, Inc., First lien                        
Principal Amount or Par Value [21],[25],[26] $ 6,367   $ 6,367                  
Spread [25],[26] 4.25%   4.25%     4.25% 4.25%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [25],[26] $ 5,683   $ 5,683                  
Investment, Identifier [Axis]: Foundational Education Group, Inc., Second lien 1                        
Principal Amount or Par Value $ 22,500 [19],[21],[45]   $ 22,500 [19],[21],[45]   $ 22,500 [16],[23],[44]              
Spread 6.50% [19],[45]   6.50% [19],[45]   6.50% [16],[44] 6.50% [19],[45] 6.50% [19],[45] 6.50% [16],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 22,500                  
Fair value, ending balance $ 22,500 [19],[45]   22,500 [19],[45]   $ 22,500 [16],[44]              
Investment, Identifier [Axis]: Foundational Education Group, Inc., Second lien 2                        
Principal Amount or Par Value $ 10,965 [19],[20],[21],[29]   $ 10,965 [19],[20],[21],[29]   $ 7,009 [16],[23],[27],[28]              
Spread 6.50% [19],[20],[29]   6.50% [19],[20],[29]   6.50% [16],[27],[28] 6.50% [19],[20],[29] 6.50% [19],[20],[29] 6.50% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 7,009                  
Fair value, ending balance $ 10,965 [19],[20],[29]   10,965 [19],[20],[29]   $ 7,009 [16],[27],[28]              
Investment, Identifier [Axis]: Fullsteam Operations LLC, First lien                        
Principal Amount or Par Value [19],[21],[25],[26] $ 6,223   $ 6,223                  
Spread [19],[25],[26] 5.25%   5.25%     5.25% 5.25%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 6,192   $ 6,192                  
Investment, Identifier [Axis]: Fullsteam Operations LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] 2,074   2,074                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Fullsteam Operations LLC, First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 691   691                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (3)   (3)                  
Investment, Identifier [Axis]: GC Waves Holdings, Inc., First lien - Undrawn                        
Principal Amount or Par Value 3,951 [19],[20],[21],[22]   3,951 [19],[20],[21],[22]   3,951 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: GC Waves Holdings, Inc., First lien 1                        
Principal Amount or Par Value $ 40,009 [19],[21],[25],[26]   $ 40,009 [19],[21],[25],[26]   $ 40,312 [16],[23],[27],[28]              
Spread 4.75% [19],[25],[26]   4.75% [19],[25],[26]   4.75% [16],[27],[28] 4.75% [19],[25],[26] 4.75% [19],[25],[26] 4.75% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 40,312                  
Fair value, ending balance $ 40,009 [19],[25],[26]   40,009 [19],[25],[26]   $ 40,312 [16],[27],[28]              
Investment, Identifier [Axis]: GC Waves Holdings, Inc., First lien 2                        
Principal Amount or Par Value $ 21,287 [19],[21],[45]   $ 21,287 [19],[21],[45]   $ 21,448 [16],[23],[44]              
Spread 4.75% [19],[45]   4.75% [19],[45]   4.75% [16],[44] 4.75% [19],[45] 4.75% [19],[45] 4.75% [16],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 21,448                  
Fair value, ending balance $ 21,287 [19],[45]   21,287 [19],[45]   $ 21,448 [16],[44]              
Investment, Identifier [Axis]: GEDC Equity, LLC, Participation Interest                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     50                  
Fair value, ending balance 50 [19],[20]   50 [19],[20]   50 [16],[17]              
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien - Drawn                        
Principal Amount or Par Value [16],[17],[23],[24]         $ 319              
Spread [16],[17],[24]         5.25%     5.25%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     319                  
Fair value, ending balance [16],[17],[24]         $ 319              
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien - Drawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] $ 1,607   $ 1,607                  
Spread [19],[20],[22] 5.25%   5.25%     5.25% 5.25%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 1,607   $ 1,607                  
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien - Drawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] $ 450   $ 450                  
Spread [19],[20],[22] 5.25%   5.25%     5.25% 5.25%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 450   $ 450                  
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien - Undrawn 1                        
Principal Amount or Par Value 759 [19],[20],[21],[22]   759 [19],[20],[21],[22]   1,120 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value 3,214 [19],[20],[21],[22]   3,214 [19],[20],[21],[22]   4,821 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien 1                        
Principal Amount or Par Value $ 25,145 [19],[21],[25],[26]   $ 25,145 [19],[21],[25],[26]   $ 34,719 [16],[23],[27],[28]              
Spread 5.25% [19],[25],[26]   5.25% [19],[25],[26]   5.25% [16],[27],[28] 5.25% [19],[25],[26] 5.25% [19],[25],[26] 5.25% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 34,719                  
Fair value, ending balance $ 25,145 [19],[25],[26]   25,145 [19],[25],[26]   $ 34,719 [16],[27],[28]              
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien 2                        
Principal Amount or Par Value $ 21,130 [19],[21],[45]   $ 21,130 [19],[21],[45]   $ 21,297 [16],[23],[44]              
Spread 5.25% [19],[45]   5.25% [19],[45]   5.25% [16],[44] 5.25% [19],[45] 5.25% [19],[45] 5.25% [16],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 21,297                  
Fair value, ending balance $ 21,130 [19],[45]   21,130 [19],[45]   $ 21,297 [16],[44]              
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien 3                        
Principal Amount or Par Value $ 2,886 [19],[20],[21],[29]   $ 2,886 [19],[20],[21],[29]   $ 2,909 [16],[17],[23],[30]              
Spread 5.25% [19],[20],[29]   5.25% [19],[20],[29]   5.25% [16],[17],[30] 5.25% [19],[20],[29] 5.25% [19],[20],[29] 5.25% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 2,909                  
Fair value, ending balance $ 2,886 [19],[20],[29]   2,886 [19],[20],[29]   $ 2,909 [16],[17],[30]              
Investment, Identifier [Axis]: Galway Borrower LLC, First lien                        
Principal Amount or Par Value $ 1,081 [19],[21],[25],[26]   $ 1,081 [19],[21],[25],[26]   $ 1,090 [16],[23],[27],[28]              
Spread 4.50% [19],[25],[26]   4.50% [19],[25],[26]   4.50% [16],[27],[28] 4.50% [19],[25],[26] 4.50% [19],[25],[26] 4.50% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 1,080                  
Fair value, ending balance $ 1,081 [19],[25],[26]   1,081 [19],[25],[26]   $ 1,080 [16],[27],[28]              
Investment, Identifier [Axis]: Galway Borrower LLC, First lien - Drawn                        
Principal Amount or Par Value $ 1,792 [19],[20],[21],[22],[29]   $ 1,792 [19],[20],[21],[22],[29]   $ 1,806 [16],[17],[23],[24]              
Spread 4.50% [19],[20],[22],[29]   4.50% [19],[20],[22],[29]   4.50% [16],[17],[24] 4.50% [19],[20],[22],[29] 4.50% [19],[20],[22],[29] 4.50% [16],[17],[24]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     $ 1,788                  
Fair value, ending balance $ 1,792 [19],[20],[22],[29]   1,792 [19],[20],[22],[29]   $ 1,788 [16],[17],[24]              
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 17,901              
Spread [16],[27],[28]         4.75%     4.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     17,856                  
Fair value, ending balance [16],[27],[28]         $ 17,856              
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien - Drawn                        
Principal Amount or Par Value [16],[17],[23],[24]         $ 448              
Spread [16],[17],[24]         4.75%     4.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     446                  
Fair value, ending balance [16],[17],[24]         $ 446              
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [16],[17],[23],[24]         1,682              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (4)                  
Fair value, ending balance [16],[17],[24]         (4)              
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         4,038              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (10)                  
Fair value, ending balance [16],[17],[24]         (10)              
Investment, Identifier [Axis]: Greenway Health, LLC, First lien                        
Principal Amount or Par Value $ 6,254 [19],[20],[21],[29]   $ 6,254 [19],[20],[21],[29]   $ 6,302 [16],[17],[23],[30]              
Spread 6.75% [19],[20],[29]   6.75% [19],[20],[29]   6.75% [16],[17],[30] 6.75% [19],[20],[29] 6.75% [19],[20],[29] 6.75% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 6,302                  
Fair value, ending balance $ 6,254 [19],[20],[29]   6,254 [19],[20],[29]   $ 6,302 [16],[17],[30]              
Investment, Identifier [Axis]: Groundworks, LLC, First lien                        
Principal Amount or Par Value [23],[32]         $ 18,908              
Spread [32]         3.25%     3.25%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [32]     19,034                  
Fair value, ending balance [32]         $ 19,034              
Investment, Identifier [Axis]: Groundworks, LLC, First lien - Drawn                        
Principal Amount or Par Value [23],[24],[32]         $ 557              
Spread [24],[32]         3.25%     3.25%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [24],[32]     560                  
Fair value, ending balance [24],[32]         $ 560              
Investment, Identifier [Axis]: Groundworks, LLC, First lien - Undrawn                        
Principal Amount or Par Value [23],[24],[32]         2,938              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [24],[32]     $ 20                  
Fair value, ending balance [24],[32]         $ 20              
Investment, Identifier [Axis]: HBWM Holdings, LLC, Common units                        
Spread [19],[35],[55],[56] 4.00%   4.00%     4.00% 4.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[55],[56] $ 9,564   $ 9,564                  
Investment, Identifier [Axis]: HBWM Holdings, LLC, Ordinary shares                        
Spread [16],[57]         4.00%     4.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[57]     9,532                  
Fair value, ending balance [16],[57]         $ 9,532              
Investment, Identifier [Axis]: HBWM Holdings, LLC.                        
Principal Amount or Par Value 4,767   4,767                  
Investment, Identifier [Axis]: HP TLE Buyer, Inc., First lien                        
Principal Amount or Par Value [19],[20],[21] $ 8,168   $ 8,168                  
Spread [19],[20] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20] $ 8,127   $ 8,127                  
Investment, Identifier [Axis]: HP TLE Buyer, Inc., First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 1,797   1,797                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (9)   (9)                  
Investment, Identifier [Axis]: HS Purchaser, LLC / Help/Systems Holdings, Inc., Second lien 1                        
Principal Amount or Par Value $ 22,500 [19],[21],[45]   $ 22,500 [19],[21],[45]   $ 22,500 [23],[44]              
Spread 6.75% [19],[45]   6.75% [19],[45]   6.75% [44] 6.75% [19],[45] 6.75% [19],[45] 6.75% [44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [44]     $ 14,513                  
Fair value, ending balance $ 19,384 [19],[45]   19,384 [19],[45]   $ 14,513 [44]              
Investment, Identifier [Axis]: HS Purchaser, LLC / Help/Systems Holdings, Inc., Second lien 2                        
Principal Amount or Par Value $ 4,208 [19],[21],[25],[26]   $ 4,208 [19],[21],[25],[26]   $ 4,208 [23],[27],[28]              
Spread 6.75% [19],[25],[26]   6.75% [19],[25],[26]   6.75% [27],[28] 6.75% [19],[25],[26] 6.75% [19],[25],[26] 6.75% [27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [27],[28]     $ 2,714                  
Fair value, ending balance $ 3,625 [19],[25],[26]   3,625 [19],[25],[26]   $ 2,714 [27],[28]              
Investment, Identifier [Axis]: Healthspan Buyer, LLC, First lien                        
Principal Amount or Par Value $ 5,031 [19],[20],[21],[29]   $ 5,031 [19],[20],[21],[29]   $ 5,069 [16],[17],[23],[30]              
Spread 4.75% [19],[20],[29]   4.75% [19],[20],[29]   5.25% [16],[17],[30] 4.75% [19],[20],[29] 4.75% [19],[20],[29] 5.25% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 5,069                  
Fair value, ending balance $ 5,031 [19],[20],[29]   5,031 [19],[20],[29]   $ 5,069 [16],[17],[30]              
Investment, Identifier [Axis]: Healthspan Buyer, LLC, First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 1,229   1,229                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Healthspan Buyer, LLC, First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24]         1,229              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc., First lien                        
Principal Amount or Par Value $ 3,779 [19],[20],[21],[29]   $ 3,779 [19],[20],[21],[29]   $ 3,808 [16],[17],[23],[30]              
Spread 4.50% [19],[20],[29]   4.50% [19],[20],[29]   4.50% [16],[17],[30] 4.50% [19],[20],[29] 4.50% [19],[20],[29] 4.50% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 3,808                  
Fair value, ending balance $ 3,779 [19],[20],[29]   3,779 [19],[20],[29]   $ 3,808 [16],[17],[30]              
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc., First lien - Drawn                        
Principal Amount or Par Value $ 4,556 [19],[20],[21],[22]   $ 4,556 [19],[20],[21],[22]   $ 2,313 [16],[17],[23],[24]              
Spread 4.75% [19],[20],[22]   4.75% [19],[20],[22]   4.75% [16],[17],[24] 4.75% [19],[20],[22] 4.75% [19],[20],[22] 4.75% [16],[17],[24]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     $ 2,313                  
Fair value, ending balance $ 4,556 [19],[20],[22]   4,556 [19],[20],[22]   $ 2,313 [16],[17],[24]              
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc., First lien - Undrawn                        
Principal Amount or Par Value 3,402 [19],[20],[21],[22]   3,402 [19],[20],[21],[22]   5,676 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Houghton Mifflin Harcourt Company, First lien                        
Principal Amount or Par Value $ 14,373 [20],[21],[29]   $ 14,373 [20],[21],[29]   $ 14,484 [17],[23],[30]              
Spread 5.25% [20],[29]   5.25% [20],[29]   5.25% [17],[30] 5.25% [20],[29] 5.25% [20],[29] 5.25% [17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [17],[30]     $ 14,291                  
Fair value, ending balance $ 12,917 [20],[29]   12,917 [20],[29]   $ 14,291 [17],[30]              
Investment, Identifier [Axis]: IG Investments Holdings, LLC, First lien - Undrawn                        
Principal Amount or Par Value 3,780 [19],[20],[21],[22]   3,780 [19],[20],[21],[22]   3,780 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: IG Investments Holdings, LLC, First lien 1                        
Principal Amount or Par Value $ 32,553 [19],[21],[25],[26]   $ 32,553 [19],[21],[25],[26]   $ 32,799 [16],[23],[27],[28]              
Spread 5.00% [19],[25],[26]   5.00% [19],[25],[26]   5.00% [16],[27],[28] 5.00% [19],[25],[26] 5.00% [19],[25],[26] 5.00% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 32,799                  
Fair value, ending balance $ 32,553 [19],[25],[26]   32,553 [19],[25],[26]   $ 32,799 [16],[27],[28]              
Investment, Identifier [Axis]: IG Investments Holdings, LLC, First lien 2                        
Principal Amount or Par Value $ 2,523 [19],[20],[21],[29]   $ 2,523 [19],[20],[21],[29]   $ 2,542 [16],[17],[23],[30]              
Spread 5.00% [19],[20],[29]   5.00% [19],[20],[29]   5.00% [16],[17],[30] 5.00% [19],[20],[29] 5.00% [19],[20],[29] 5.00% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 2,542                  
Fair value, ending balance $ 2,523 [19],[20],[29]   2,523 [19],[20],[29]   $ 2,542 [16],[17],[30]              
Investment, Identifier [Axis]: Icefall Parent, Inc., First lien                        
Principal Amount or Par Value $ 8,422 [19],[20],[21]   $ 8,422 [19],[20],[21]   $ 8,696 [16],[17],[23],[30]              
Spread 4.50% [19],[20]   4.50% [19],[20]   6.50% [16],[17],[30] 4.50% [19],[20] 4.50% [19],[20] 6.50% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 8,696                  
Fair value, ending balance $ 8,422 [19],[20]   8,422 [19],[20]   $ 8,696 [16],[17],[30]              
Investment, Identifier [Axis]: Icefall Parent, Inc., First lien - Undrawn                        
Principal Amount or Par Value 828 [19],[20],[21],[22]   828 [19],[20],[21],[22]   828 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Idera, Inc., Second lien 1                        
Principal Amount or Par Value [16],[23],[32]         $ 15,091              
Spread [16],[32]         6.75%     6.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32]     15,091                  
Fair value, ending balance [16],[32]         $ 15,091              
Investment, Identifier [Axis]: Idera, Inc., Second lien 2                        
Principal Amount or Par Value [16],[17],[23],[30]         $ 2,012              
Spread [16],[17],[30]         6.75%     6.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     2,012                  
Fair value, ending balance [16],[17],[30]         $ 2,012              
Investment, Identifier [Axis]: Infogain Corporation, First lien - Undrawn                        
Principal Amount or Par Value 3,827 [19],[20],[21],[22]   3,827 [19],[20],[21],[22]   3,827 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Infogain Corporation, First lien 1                        
Principal Amount or Par Value $ 18,372 [19],[21],[25],[26]   $ 18,372 [19],[21],[25],[26]   $ 18,372 [16],[23],[27],[28]              
Spread 5.75% [19],[25],[26]   5.75% [19],[25],[26]   5.75% [16],[27],[28] 5.75% [19],[25],[26] 5.75% [19],[25],[26] 5.75% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 18,372                  
Fair value, ending balance $ 18,372 [19],[25],[26]   18,372 [19],[25],[26]   $ 18,372 [16],[27],[28]              
Investment, Identifier [Axis]: Infogain Corporation, First lien 2                        
Principal Amount or Par Value $ 7,704 [19],[20],[21],[29]   $ 7,704 [19],[20],[21],[29]   $ 7,764 [16],[17],[23],[30]              
Spread 5.75% [19],[20],[29]   5.75% [19],[20],[29]   5.75% [16],[17],[30] 5.75% [19],[20],[29] 5.75% [19],[20],[29] 5.75% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 7,764                  
Fair value, ending balance $ 7,704 [19],[20],[29]   7,704 [19],[20],[29]   $ 7,764 [16],[17],[30]              
Investment, Identifier [Axis]: Infogain Corporation, Subordinated                        
Principal Amount or Par Value $ 16,953 [19],[20],[21]   $ 16,953 [19],[20],[21]   $ 16,953 [16],[17],[23]              
Spread 7.50% [19],[20]   7.50% [19],[20]   7.50% [16],[17] 7.50% [19],[20] 7.50% [19],[20] 7.50% [16],[17]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     $ 16,953                  
Fair value, ending balance $ 16,953 [19],[20]   16,953 [19],[20]   $ 16,953 [16],[17]              
Investment, Identifier [Axis]: Integro Parent Inc., Second lien                        
Principal Amount or Par Value [16],[17],[23],[30],[38]         7,091              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30],[38]     6,331                  
Fair value, ending balance [16],[17],[30],[38]         $ 6,331              
Investment, Identifier [Axis]: Ivy Hill Middle Market Credit Fund, Ltd, Structured Finance Obligation                        
Principal Amount or Par Value [19],[20],[21],[37] $ 3,232   $ 3,232                  
Spread [19],[20],[37] 7.00%   7.00%     7.00% 7.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[37] $ 3,257   $ 3,257                  
Investment, Identifier [Axis]: Ivy Hill Middle Market Credit Fund, Ltd, Structured Finance Obligations                        
Spread [17],[38]         7.00%     7.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [17],[38]     3,232                  
Fair value, ending balance [17],[38]         $ 3,232              
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien - Drawn                        
Principal Amount or Par Value [16],[17],[23],[24]         $ 19              
Spread [16],[17],[24]         5.75%     5.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     18                  
Fair value, ending balance [16],[17],[24]         $ 18              
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24]         1,568              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (47)                  
Fair value, ending balance [16],[17],[24]         (47)              
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien 1                        
Principal Amount or Par Value $ 6,774 [19],[20],[21],[29]   $ 6,774 [19],[20],[21],[29]   $ 6,827 [16],[17],[23],[30]              
Spread 5.50% [19],[20],[29]   5.50% [19],[20],[29]   5.50% [16],[17],[30] 5.50% [19],[20],[29] 5.50% [19],[20],[29] 5.50% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 6,570                  
Fair value, ending balance $ 6,283 [19],[20],[29]   6,283 [19],[20],[29]   $ 6,570 [16],[17],[30]              
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien 2                        
Principal Amount or Par Value $ 1,140 [19],[20],[21],[29]   $ 1,140 [19],[20],[21],[29]   $ 1,149 [16],[17],[23],[30]              
Spread 5.50% [19],[20],[29]   5.50% [19],[20],[29]   5.50% [16],[17],[30] 5.50% [19],[20],[29] 5.50% [19],[20],[29] 5.50% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 1,106                  
Fair value, ending balance $ 1,057 [19],[20],[29]   1,057 [19],[20],[29]   $ 1,106 [16],[17],[30]              
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien 3                        
Principal Amount or Par Value $ 776 [19],[20],[21],[29]   $ 776 [19],[20],[21],[29]   $ 782 [16],[17],[23],[30]              
Spread 5.50% [19],[20],[29]   5.50% [19],[20],[29]   5.50% [16],[17],[30] 5.50% [19],[20],[29] 5.50% [19],[20],[29] 5.50% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 752                  
Fair value, ending balance $ 720 [19],[20],[29]   720 [19],[20],[29]   $ 752 [16],[17],[30]              
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien 4                        
Principal Amount or Par Value [19],[20],[21] $ 19   $ 19                  
Spread [19],[20] 5.75%   5.75%     5.75% 5.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20] $ 17   $ 17                  
Investment, Identifier [Axis]: Kaseya Inc., First lien - Drawn 1                        
Principal Amount or Par Value [16],[17],[23],[24],[30]         $ 973              
Spread [16],[17],[24],[30]         5.50%     5.50%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[30]     973                  
Fair value, ending balance [16],[17],[24],[30]         $ 973              
Investment, Identifier [Axis]: Kaseya Inc., First lien - Drawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         $ 751              
Spread [16],[17],[24]         5.50%     5.50%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     751                  
Fair value, ending balance [16],[17],[24]         $ 751              
Investment, Identifier [Axis]: Kaseya Inc., First lien - Undrawn 1                        
Principal Amount or Par Value [16],[17],[23],[24]         2,865              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Kaseya Inc., First lien - Undrawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         2,888              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Kaseya Inc., First lien 1                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 64,124              
Spread [16],[27],[28]         5.50%     5.50%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     64,124                  
Fair value, ending balance [16],[27],[28]         $ 64,124              
Investment, Identifier [Axis]: Kaseya Inc., First lien 2                        
Principal Amount or Par Value [16],[17],[23],[30]         $ 238              
Spread [16],[17],[30]         5.50%     5.50%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     238                  
Fair value, ending balance [16],[17],[30]         $ 238              
Investment, Identifier [Axis]: Kaseya, Inc., First lien                        
Number of investments held | investment         2     2        
Investment, Identifier [Axis]: Kele Holdco, Inc., First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22],[29] $ 990   $ 990                  
Spread [19],[20],[22],[29] 4.50%   4.50%     4.50% 4.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22],[29] $ 990   $ 990                  
Investment, Identifier [Axis]: Kele Holdco, Inc., First lien - Undrawn                        
Principal Amount or Par Value 810 [19],[20],[21],[22]   810 [19],[20],[21],[22]   $ 1,799 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Kele Holdco, Inc., First lien 1                        
Principal Amount or Par Value $ 14,513 [19],[21],[45]   $ 14,513 [19],[21],[45]   $ 14,635 [16],[23],[44]              
Spread 4.50% [19],[45]   4.50% [19],[45]   4.50% [16],[44] 4.50% [19],[45] 4.50% [19],[45] 4.50% [16],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 14,635                  
Fair value, ending balance $ 14,513 [19],[45]   14,513 [19],[45]   $ 14,635 [16],[44]              
Investment, Identifier [Axis]: Kele Holdco, Inc., First lien 2                        
Principal Amount or Par Value $ 1,248 [19],[21],[45]   $ 1,248 [19],[21],[45]   $ 2,268 [16],[23],[44]              
Spread 4.50% [19],[45]   4.50% [19],[45]   4.50% [16],[44] 4.50% [19],[45] 4.50% [19],[45] 4.50% [16],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 2,268                  
Fair value, ending balance $ 1,248 [19],[45]   1,248 [19],[45]   $ 2,268 [16],[44]              
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien                        
Principal Amount or Par Value $ 3,483 [19],[21],[25],[26]   $ 3,483 [19],[21],[25],[26]   $ 3,509 [16],[23],[27],[28]              
Spread 5.25% [19],[25],[26]   5.25% [19],[25],[26]   5.25% [16],[27],[28] 5.25% [19],[25],[26] 5.25% [19],[25],[26] 5.25% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 3,509                  
Fair value, ending balance $ 3,483 [19],[25],[26]   3,483 [19],[25],[26]   $ 3,509 [16],[27],[28]              
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien - Drawn                        
Principal Amount or Par Value $ 161 [19],[20],[21],[22]   $ 161 [19],[20],[21],[22]   $ 162 [16],[17],[23],[24]              
Spread 5.25% [19],[20],[22]   5.25% [19],[20],[22]   5.25% [16],[17],[24] 5.25% [19],[20],[22] 5.25% [19],[20],[22] 5.25% [16],[17],[24]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     $ 162                  
Fair value, ending balance $ 161 [19],[20],[22]   161 [19],[20],[22]   $ 162 [16],[17],[24]              
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien - Undrawn 1                        
Principal Amount or Par Value 1,398 [19],[20],[21],[22]   1,398 [19],[20],[21],[22]   1,398 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value 468 [19],[20],[21],[22]   468 [19],[20],[21],[22]   468 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Knockout Intermediate Holdings I Inc., Preferred shares                        
Principal Amount or Par Value 12,400   12,400                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[58]     21,010                  
Fair value, ending balance 12,400 [19],[20],[59]   12,400 [19],[20],[59]   21,010 [16],[17],[58]              
Investment, Identifier [Axis]: LSCS Holdings, Inc., First lien                        
Principal Amount or Par Value [21],[25],[26] $ 5,155   $ 5,155                  
Spread [25],[26] 4.50%   4.50%     4.50% 4.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [25],[26] $ 5,086   $ 5,086                  
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien                        
Principal Amount or Par Value $ 6,206 [19],[21],[45]   $ 6,206 [19],[21],[45]   $ 6,124 [16],[23],[44]              
Spread 2.75% [19],[35],[45]   2.75% [19],[35],[45]   2.75% [16],[36],[44] 2.75% [19],[35],[45] 2.75% [19],[35],[45] 2.75% [16],[36],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 6,062                  
Fair value, ending balance $ 6,206 [19],[45]   6,206 [19],[45]   $ 6,062 [16],[44]              
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien - Drawn                        
Principal Amount or Par Value [16],[17],[23],[24]         $ 72              
Spread [16],[17],[24]         5.00%     5.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     71                  
Fair value, ending balance [16],[17],[24]         $ 71              
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien - Drawn 1                        
Principal Amount or Par Value [19],[21],[22],[45] $ 221   $ 221                  
Spread [19],[22],[45] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[22],[45] $ 221   $ 221                  
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien - Drawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] $ 72   $ 72                  
Spread [19],[20],[22] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 72   $ 72                  
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value 136 [19],[21],[22],[45]   136 [19],[21],[22],[45]   358 [16],[23],[24],[44]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[24],[44]     (4)                  
Fair value, ending balance 0 [19],[22],[45]   0 [19],[22],[45]   (4) [16],[24],[44]              
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value 644 [19],[20],[21],[22]   644 [19],[20],[21],[22]   644 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (6)                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   (6) [16],[17],[24]              
Investment, Identifier [Axis]: Logrhythm, Inc., First lien                        
Principal Amount or Par Value $ 4,196 [19],[20],[21]   $ 4,196 [19],[20],[21]   $ 4,196 [16],[17],[23],[30]              
Spread 7.50% [19],[20]   7.50% [19],[20]   7.50% [16],[17],[30] 7.50% [19],[20] 7.50% [19],[20] 7.50% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 4,196                  
Fair value, ending balance $ 4,047 [19],[20]   4,047 [19],[20]   $ 4,196 [16],[17],[30]              
Investment, Identifier [Axis]: Logrhythm, Inc., First lien - Undrawn                        
Principal Amount or Par Value 420 [19],[20],[21],[22]   420 [19],[20],[21],[22]   420 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance (15) [19],[20],[22]   (15) [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Low Voltage Holdings Inc., First lien                        
Principal Amount or Par Value [19],[20],[21],[29] $ 16,902   $ 16,902                  
Spread [19],[20],[29] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 16,839   $ 16,839                  
Investment, Identifier [Axis]: Low Voltage Holdings Inc., First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] 819   819                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (3)   (3)                  
Investment, Identifier [Axis]: Low Voltage Holdings Inc., First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 2,317   2,317                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (9)   (9)                  
Investment, Identifier [Axis]: Low Voltage Holdings Inc., First lien - Undrawn 3                        
Principal Amount or Par Value [19],[20],[21],[22] 5,257   5,257                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (19)   (19)                  
Investment, Identifier [Axis]: MRI Software LLC, First lien - Drawn                        
Principal Amount or Par Value $ 200 [19],[20],[21],[22]   $ 200 [19],[20],[21],[22]   $ 111 [16],[17],[23],[24]              
Spread 4.75% [19],[20],[22]   4.75% [19],[20],[22]   4.75% [16],[17],[24] 4.75% [19],[20],[22] 4.75% [19],[20],[22] 4.75% [16],[17],[24]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     $ 111                  
Fair value, ending balance $ 200 [19],[20],[22]   200 [19],[20],[22]   $ 111 [16],[17],[24]              
Investment, Identifier [Axis]: MRI Software LLC, First lien - Undrawn                        
Principal Amount or Par Value 1,802 [19],[20],[21],[22]   1,802 [19],[20],[21],[22]   1,891 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: MRI Software LLC, First lien 1                        
Principal Amount or Par Value $ 21,261 [19],[21],[45]   $ 21,261 [19],[21],[45]   $ 21,430 [16],[23],[44]              
Spread 4.75% [19],[45]   4.75% [19],[45]   4.75% [16],[44] 4.75% [19],[45] 4.75% [19],[45] 4.75% [16],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 21,430                  
Fair value, ending balance $ 21,261 [19],[45]   21,261 [19],[45]   $ 21,430 [16],[44]              
Investment, Identifier [Axis]: MRI Software LLC, First lien 2                        
Principal Amount or Par Value $ 7,532 [19],[20],[21],[29]   $ 7,532 [19],[20],[21],[29]   $ 7,591 [16],[17],[23],[30]              
Spread 4.75% [19],[20],[29]   4.75% [19],[20],[29]   4.75% [16],[17],[30] 4.75% [19],[20],[29] 4.75% [19],[20],[29] 4.75% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 7,591                  
Fair value, ending balance $ 7,532 [19],[20],[29]   7,532 [19],[20],[29]   $ 7,591 [16],[17],[30]              
Investment, Identifier [Axis]: MRI Software LLC, First lien 3                        
Principal Amount or Par Value $ 4,486 [19],[21],[25],[26]   $ 4,486 [19],[21],[25],[26]   $ 4,521 [16],[23],[27],[28]              
Spread 4.75% [19],[25],[26]   4.75% [19],[25],[26]   4.75% [16],[27],[28] 4.75% [19],[25],[26] 4.75% [19],[25],[26] 4.75% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 4,521                  
Fair value, ending balance $ 4,486 [19],[25],[26]   4,486 [19],[25],[26]   $ 4,521 [16],[27],[28]              
Investment, Identifier [Axis]: MRI Software LLC, First lien 4                        
Principal Amount or Par Value $ 3,083 [19],[21],[25],[26]   $ 3,083 [19],[21],[25],[26]   $ 3,107 [16],[23],[27],[28]              
Spread 4.75% [19],[25],[26]   4.75% [19],[25],[26]   4.75% [16],[27],[28] 4.75% [19],[25],[26] 4.75% [19],[25],[26] 4.75% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 3,107                  
Fair value, ending balance $ 3,083 [19],[25],[26]   3,083 [19],[25],[26]   $ 3,107 [16],[27],[28]              
Investment, Identifier [Axis]: MRI Software LLC, First lien 5                        
Principal Amount or Par Value $ 787 [19],[20],[21],[29]   $ 787 [19],[20],[21],[29]   $ 793 [16],[17],[23],[30]              
Spread 4.75% [19],[20],[29]   4.75% [19],[20],[29]   4.75% [16],[17],[30] 4.75% [19],[20],[29] 4.75% [19],[20],[29] 4.75% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 793                  
Fair value, ending balance $ 787 [19],[20],[29]   787 [19],[20],[29]   $ 793 [16],[17],[30]              
Investment, Identifier [Axis]: Mai Capital Management Intermediate LLC, First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22] $ 55   $ 55                  
Spread [19],[20],[22] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 55   $ 55                  
Investment, Identifier [Axis]: Mai Capital Management Intermediate LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] 3,692   3,692                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Mai Capital Management Intermediate LLC, First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 252   252                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Michael Baker International, LLC, First lien                        
Principal Amount or Par Value [17],[23],[30]         $ 4,892              
Spread [17],[30]         4.75%     4.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [17],[30]     4,910                  
Fair value, ending balance [17],[30]         $ 4,910              
Investment, Identifier [Axis]: Model N, Inc., First lien                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 44,218              
Spread [16],[27],[28]         5.00%     5.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     43,997                  
Fair value, ending balance [16],[27],[28]         $ 43,997              
Investment, Identifier [Axis]: Model N, Inc., First lien                        
Principal Amount or Par Value [19],[21],[25],[26] $ 43,885   $ 43,885                  
Spread [19],[25],[26] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 43,885   $ 43,885                  
Investment, Identifier [Axis]: Model N, Inc., First lien - Undrawn 1                        
Principal Amount or Par Value 9,047 [19],[20],[21],[22]   9,047 [19],[20],[21],[22]   4,825 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (24)                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   (24) [16],[17],[24]              
Investment, Identifier [Axis]: Model N, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value 4,825 [19],[20],[21],[22]   4,825 [19],[20],[21],[22]   9,047 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (45)                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   (45) [16],[17],[24]              
Investment, Identifier [Axis]: NC Topco, LLC, First lien                        
Principal Amount or Par Value $ 5,877 [19],[21],[25],[26]   $ 5,877 [19],[21],[25],[26]   $ 5,853 [16],[23],[27],[28]              
Spread 4.50% [19],[25],[26]   4.50% [19],[25],[26]   2.50% [16],[27],[28],[36] 4.50% [19],[25],[26] 4.50% [19],[25],[26] 2.50% [16],[27],[28],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 5,824                  
Fair value, ending balance $ 5,877 [19],[25],[26]   5,877 [19],[25],[26]   $ 5,824 [16],[27],[28]              
Investment, Identifier [Axis]: NC Topco, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value 1,672 [19],[20],[21],[22]   1,672 [19],[20],[21],[22]   669 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (3)                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   (3) [16],[17],[24]              
Investment, Identifier [Axis]: NC Topco, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value 669 [19],[20],[21],[22]   669 [19],[20],[21],[22]   1,672 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (8)                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   (8) [16],[17],[24]              
Investment, Identifier [Axis]: NHME Holdings Corp., Ordinary shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17],[60]     0                  
Fair value, ending balance 0 [14],[19],[20],[61]   0 [14],[19],[20],[61]   0 [9],[16],[17],[60]              
Investment, Identifier [Axis]: NHME Holdings Corp., Warrants                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17],[60]     0                  
Fair value, ending balance 0 [14],[19],[20],[61]   0 [14],[19],[20],[61]   0 [9],[16],[17],[60]              
Investment, Identifier [Axis]: NM GP Holdco, LLC, Membership interest                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[38],[62]     322                  
Fair value, ending balance 393 [14],[19],[37],[63]   393 [14],[19],[37],[63]   322 [9],[16],[38],[62]              
Investment, Identifier [Axis]: NM NL Holdings, L.P., Membership interest                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[38],[62]     104,512                  
Fair value, ending balance 105,878 [14],[19],[37],[63]   105,878 [14],[19],[37],[63]   104,512 [9],[16],[38],[62]              
Investment, Identifier [Axis]: NM YI, LLC, Membership interest                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[62]     9,960                  
Fair value, ending balance 8,673 [14],[19],[63]   8,673 [14],[19],[63]   9,960 [9],[16],[62]              
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc., First lien 1                        
Principal Amount or Par Value [16],[17],[23],[30]         $ 19,259              
Spread [16],[17],[30]         6.09%     6.09%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     19,259                  
Fair value, ending balance [16],[17],[30]         $ 19,259              
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc., First lien 2                        
Principal Amount or Par Value [16],[17],[23],[30]         $ 5,012              
Spread [16],[17],[30]         6.09%     6.09%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     5,012                  
Fair value, ending balance [16],[17],[30]         $ 5,012              
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc., First lien 3                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 4,913              
Spread [16],[27],[28]         6.09%     6.09%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     4,913                  
Fair value, ending balance [16],[27],[28]         $ 4,913              
Investment, Identifier [Axis]: NMFC Senior Loan Program III LLC, Membership interest                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17],[38]     160,000                  
Fair value, ending balance 160,000 [14],[19],[20],[37]   160,000 [14],[19],[20],[37]   160,000 [9],[16],[17],[38]              
Investment, Identifier [Axis]: NMFC Senior Loan Program IV LLC, Membership interest                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17],[38]     112,400                  
Fair value, ending balance 112,400 [14],[19],[20],[37]   112,400 [14],[19],[20],[37]   112,400 [9],[16],[17],[38]              
Investment, Identifier [Axis]: National HME, Inc., Second lien                        
Principal Amount or Par Value 8,281 [14],[19],[20],[21],[61]   8,281 [14],[19],[20],[21],[61]   8,281 [9],[16],[17],[23],[60]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17],[60]     3,000                  
Fair value, ending balance $ 3,000 [14],[19],[20],[61]   $ 3,000 [14],[19],[20],[61]   $ 3,000 [9],[16],[17],[60]              
Investment, Identifier [Axis]: National HME, Inc., Second lien, Tranche A Term Loan                        
Investment, percentage of interest entitled to receive 20.00%   20.00%   20.00% 20.00% 20.00% 20.00%        
Spread 5.00%   5.00%   5.00% 5.00% 5.00% 5.00%        
Investment, Identifier [Axis]: National HME, Inc., Second lien, Tranche B Term Loan                        
Investment, percentage of interest entitled to receive 20.00%   20.00%   20.00% 20.00% 20.00% 20.00%        
Spread 6.00%   6.00%   6.00% 6.00% 6.00% 6.00%        
Investment, Identifier [Axis]: Nelipak Holding Company First lien 1                        
Principal Amount or Par Value         $ 17,109              
Investment, Identifier [Axis]: Nelipak Holding Company First lien 2                        
Principal Amount or Par Value         406              
Investment, Identifier [Axis]: Nelipak Holding Company First lien 3                        
Principal Amount or Par Value         6,638              
Investment, Identifier [Axis]: Nelipak Holding Company First lien 4                        
Principal Amount or Par Value         833              
Investment, Identifier [Axis]: Nelipak Holding Company, Drawn Revolver                        
Principal Amount or Par Value $ 92   $ 92                  
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Drawn 1                        
Principal Amount or Par Value $ 1,620 [19],[20],[21],[22],[29],[64]   $ 1,620 [19],[20],[21],[22],[29],[64]   $ 1,097 [16],[17],[23],[24],[30],[65]              
Spread 5.50% [19],[20],[22],[29],[64]   5.50% [19],[20],[22],[29],[64]   5.50% [16],[17],[24],[30],[65] 5.50% [19],[20],[22],[29],[64] 5.50% [19],[20],[22],[29],[64] 5.50% [16],[17],[24],[30],[65]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[30],[65]     $ 1,097                  
Fair value, ending balance $ 1,620 [19],[20],[22],[29],[64]   $ 1,620 [19],[20],[22],[29],[64]   $ 1,097 [16],[17],[24],[30],[65]              
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Drawn 2                        
Principal Amount or Par Value         $ 392 [16],[17],[23],[24] € 78 [19],[20],[21],[22]            
Spread 5.50% [19],[20],[22]   5.50% [19],[20],[22]   5.50% [16],[17],[24] 5.50% [19],[20],[22] 5.50% [19],[20],[22] 5.50% [16],[17],[24]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     $ 405                  
Fair value, ending balance $ 92 [19],[20],[22]   92 [19],[20],[22]   $ 405 [16],[17],[24]              
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 1                        
Principal Amount or Par Value 3,501 [19],[20],[21],[22]   3,501 [19],[20],[21],[22]   3,501 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 2                        
Principal Amount or Par Value | €           € 6,411 [19],[20],[21],[22],[29],[64]   € 6,411 [16],[17],[23],[24],[30],[65]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[30],[65]     0                  
Fair value, ending balance 0 [19],[20],[22],[29],[64]   0 [19],[20],[22],[29],[64]   0 [16],[17],[24],[30],[65]              
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 3                        
Principal Amount or Par Value 993 [19],[20],[21],[22]   993 [19],[20],[21],[22]         804 [16],[17],[23],[24],[30],[65]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[30],[65]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24],[30],[65]              
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 4                        
Principal Amount or Par Value         1,515 [16],[17],[23],[24] 1,118 [19],[20],[21],[22],[29],[64]            
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22],[29],[64]   0 [19],[20],[22],[29],[64]   $ 0 [16],[17],[24]              
Investment, Identifier [Axis]: Nelipak Holding Company, First lien 1                        
Principal Amount or Par Value $ 19,243   $ 19,243     € 16,399 [19],[20],[21],[29],[64]   € 16,523 [16],[17],[23],[30],[65]        
Spread 5.50% [19],[20],[29],[64]   5.50% [19],[20],[29],[64]   5.50% [16],[17],[30],[65] 5.50% [19],[20],[29],[64] 5.50% [19],[20],[29],[64] 5.50% [16],[17],[30],[65]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30],[65]     $ 17,108                  
Fair value, ending balance $ 19,241 [19],[20],[29],[64]   19,241 [19],[20],[29],[64]   $ 17,108 [16],[17],[30],[65]              
Investment, Identifier [Axis]: Nelipak Holding Company, First lien 2                        
Principal Amount or Par Value $ 8,955 [19],[21],[25],[26]   $ 8,955 [19],[21],[25],[26]   $ 9,023 [16],[23],[27],[28]              
Spread 5.50% [19],[25],[26]   5.50% [19],[25],[26]   5.50% [16],[27],[28] 5.50% [19],[25],[26] 5.50% [19],[25],[26] 5.50% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 9,023                  
Fair value, ending balance $ 8,955 [19],[25],[26]   8,955 [19],[25],[26]   $ 9,023 [16],[27],[28]              
Investment, Identifier [Axis]: Nelipak Holding Company, Undrawn Delayed Draw Term Loan                        
Principal Amount or Par Value 7,522   7,522                  
Investment, Identifier [Axis]: Nelipak Holding Company, Undrawn Revolver                        
Principal Amount or Par Value 1,311   1,311                  
Investment, Identifier [Axis]: New Benevis Holdco, Inc., First lien 1                        
Principal Amount or Par Value 50,388 [14],[19],[21],[26]   50,388 [14],[19],[21],[26]   46,068 [9],[16],[23],[28]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[28]     46,068                  
Fair value, ending balance 50,388 [14],[19],[26]   50,388 [14],[19],[26]   46,068 [9],[16],[28]              
Investment, Identifier [Axis]: New Benevis Holdco, Inc., First lien 2                        
Principal Amount or Par Value 39,834 [14],[19],[20],[21],[29]   39,834 [14],[19],[20],[21],[29]   33,155 [9],[16],[17],[23],[30]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17],[30]     33,155                  
Fair value, ending balance 39,834 [14],[19],[20],[29]   39,834 [14],[19],[20],[29]   33,155 [9],[16],[17],[30]              
Investment, Identifier [Axis]: New Benevis Holdco, Inc., Subordinated                        
Principal Amount or Par Value 26,071 [14],[19],[20],[21]   26,071 [14],[19],[20],[21]   23,814 [9],[16],[17],[23]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17]     19,051                  
Fair value, ending balance 20,857 [14],[19],[20]   20,857 [14],[19],[20]   19,051 [9],[16],[17]              
Investment, Identifier [Axis]: New Benevis Topco, LLC, Common stock 1                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [14],[19],[26] 27,721   27,721                  
Investment, Identifier [Axis]: New Benevis Topco, LLC, Common stock 2                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [14],[19],[20] 12,992   12,992                  
Investment, Identifier [Axis]: New Benevis Topco, LLC, Ordinary shares 1                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[28]     28,481                  
Fair value, ending balance [9],[16],[28]         28,481              
Investment, Identifier [Axis]: New Benevis Topco, LLC, Ordinary shares 2                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17]     13,347                  
Fair value, ending balance [9],[16],[17]         13,347              
Investment, Identifier [Axis]: New Permian Holdco, Inc., Ordinary shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17]     18,900                  
Fair value, ending balance 13,000 [14],[19],[20]   13,000 [14],[19],[20]   18,900 [9],[16],[17]              
Investment, Identifier [Axis]: New Permian Holdco, L.L.C., First lien                        
Principal Amount or Par Value $ 23,336 [14],[19],[20],[21],[29]   $ 23,336 [14],[19],[20],[21],[29]   $ 23,336 [9],[16],[17],[23],[30]              
Spread 9.00% [14],[19],[20],[29]   9.00% [14],[19],[20],[29]   9.00% [9],[16],[17],[30] 9.00% [14],[19],[20],[29] 9.00% [14],[19],[20],[29] 9.00% [9],[16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17],[30]     $ 23,336                  
Fair value, ending balance $ 23,336 [14],[19],[20],[29]   23,336 [14],[19],[20],[29]   $ 23,336 [9],[16],[17],[30]              
Investment, Identifier [Axis]: New Permian Holdco, L.L.C., First lien - Drawn                        
Principal Amount or Par Value [14],[19],[20],[21],[22],[29] $ 26,998   $ 26,998                  
Spread [14],[19],[20],[22],[29] 6.00%   6.00%     6.00% 6.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [14],[19],[20],[22],[29] $ 26,998   $ 26,998                  
Investment, Identifier [Axis]: New Permian Holdco, L.L.C., First lien - Drawn                        
Principal Amount or Par Value [9],[16],[17],[23],[24],[30]         $ 20,840              
Spread [9],[16],[17],[24],[30]         6.00%     6.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17],[24],[30]     20,840                  
Fair value, ending balance [9],[16],[17],[24],[30]         $ 20,840              
Investment, Identifier [Axis]: New Permian Holdco, L.L.C., First lien - Undrawn                        
Principal Amount or Par Value 4,897 [14],[19],[20],[21],[22]   4,897 [14],[19],[20],[21],[22]   1,055 [9],[16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17],[24]     0                  
Fair value, ending balance 0 [14],[19],[20],[22]   0 [14],[19],[20],[22]   0 [9],[16],[17],[24]              
Investment, Identifier [Axis]: Next Holdco, LLC, First lien                        
Principal Amount or Par Value $ 6,280 [19],[21],[25],[26]   $ 6,280 [19],[21],[25],[26]   $ 3,494 [16],[23],[27],[28]              
Spread 5.25% [19],[25],[26]   5.25% [19],[25],[26]   5.75% [16],[27],[28] 5.25% [19],[25],[26] 5.25% [19],[25],[26] 5.75% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 3,494                  
Fair value, ending balance $ 6,280 [19],[25],[26]   6,280 [19],[25],[26]   $ 3,494 [16],[27],[28]              
Investment, Identifier [Axis]: Next Holdco, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [16],[17],[23],[24]         903              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Next Holdco, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         339              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Next Holdco, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] 903   903                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Next Holdco, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 339   339                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Notorious Topco, LLC , First lien                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance 13,715   13,715                  
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22] $ 880   $ 880                  
Spread [19],[20],[22],[39] 6.75%   6.75%     6.75% 6.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 551   $ 551                  
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24]         880              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (71)                  
Fair value, ending balance [16],[17],[24]         (71)              
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien 1                        
Principal Amount or Par Value $ 10,135 [19],[20],[21],[29]   $ 10,135 [19],[20],[21],[29]   $ 10,058 [16],[17],[23],[30]              
Spread 4.75% [19],[20],[29],[35],[39]   4.75% [19],[20],[29],[35],[39]   4.75% [16],[17],[30],[36] 4.75% [19],[20],[29],[35],[39] 4.75% [19],[20],[29],[35],[39] 4.75% [16],[17],[30],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 9,241                  
Fair value, ending balance $ 6,345 [19],[20],[29]   6,345 [19],[20],[29]   $ 9,241 [16],[17],[30]              
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien 2                        
Principal Amount or Par Value $ 10,008 [19],[20],[21],[29]   $ 10,008 [19],[20],[21],[29]   $ 9,932 [16],[17],[23],[30]              
Spread 4.75% [19],[20],[29],[35],[39]   4.75% [19],[20],[29],[35],[39]   4.75% [16],[17],[30],[36] 4.75% [19],[20],[29],[35],[39] 4.75% [19],[20],[29],[35],[39] 4.75% [16],[17],[30],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 9,126                  
Fair value, ending balance $ 6,266 [19],[20],[29]   6,266 [19],[20],[29]   $ 9,126 [16],[17],[30]              
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien 3                        
Principal Amount or Par Value $ 883 [19],[20],[21],[29]   $ 883 [19],[20],[21],[29]   $ 877 [16],[17],[23],[30]              
Spread 4.75% [19],[20],[29],[35],[39]   4.75% [19],[20],[29],[35],[39]   4.75% [16],[17],[30],[36] 4.75% [19],[20],[29],[35],[39] 4.75% [19],[20],[29],[35],[39] 4.75% [16],[17],[30],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 805                  
Fair value, ending balance $ 553 [19],[20],[29]   553 [19],[20],[29]   $ 805 [16],[17],[30]              
Investment, Identifier [Axis]: OA Buyer, Inc., First lien                        
Number of investments held | investment         3     3        
Investment, Identifier [Axis]: OA Buyer, Inc., First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24],[66]         $ 3,600              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[66]     0                  
Fair value, ending balance [16],[17],[24],[66]         0              
Investment, Identifier [Axis]: OA Buyer, Inc., First lien 1                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 31,513              
Spread [16],[27],[28]         4.75%     4.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     31,513                  
Fair value, ending balance [16],[27],[28]         $ 31,513              
Investment, Identifier [Axis]: OA Buyer, Inc., First lien 2                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 27,425              
Spread [16],[27],[28]         4.75%     4.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     27,425                  
Fair value, ending balance [16],[27],[28]         $ 27,425              
Investment, Identifier [Axis]: OA Buyer, Inc., First lien 3                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 1,736              
Spread [16],[27],[28]         4.75%     4.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     1,736                  
Fair value, ending balance [16],[27],[28]         $ 1,736              
Investment, Identifier [Axis]: OA Topco, L.P., Ordinary shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[66]     7,646                  
Fair value, ending balance [16],[17],[66]         7,646              
Investment, Identifier [Axis]: OEConnection LLC, First lien                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 46,430              
Spread [16],[27],[28]         5.00%     5.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     46,430                  
Fair value, ending balance [16],[27],[28]         $ 46,430              
Investment, Identifier [Axis]: OEConnection LLC, First lien - Undrawn                        
Principal Amount or Par Value [20],[21],[22] 5,063   5,063                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [20],[22] 0   0                  
Investment, Identifier [Axis]: OEConnection LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [16],[17],[23],[24]         8,101              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: OEConnection LLC, First lien - Undrawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         5,063              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: OEConnection LLC, First lien 1                        
Principal Amount or Par Value [21],[25],[26] $ 46,080   $ 46,080                  
Spread [25],[26] 5.25%   5.25%     5.25% 5.25%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [25],[26] $ 46,234   $ 46,234                  
Investment, Identifier [Axis]: OEConnection LLC, First lien 2                        
Principal Amount or Par Value [20],[21],[29] $ 8,040   $ 8,040                  
Spread [20],[29] 5.25%   5.25%     5.25% 5.25%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [20],[29] $ 8,067   $ 8,067                  
Investment, Identifier [Axis]: Oranje Holdco, Inc., First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24]         1,860              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Oranje Holdco, Inc., First lien 1                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 7,440              
Spread [16],[27],[28]         7.75%     7.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     7,440                  
Fair value, ending balance [16],[27],[28]         $ 7,440              
Investment, Identifier [Axis]: Oranje Holdco, Inc., First lien 2                        
Principal Amount or Par Value [16],[17],[23]         $ 7,440              
Spread [16],[17]         7.75%     7.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     7,440                  
Fair value, ending balance [16],[17]         $ 7,440              
Investment, Identifier [Axis]: Oranje Holdco, Inc., First lien 3                        
Principal Amount or Par Value [16],[17],[23]         $ 5,454              
Spread [16],[17]         7.25%     7.25%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     5,454                  
Fair value, ending balance [16],[17]         $ 5,454              
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien                        
Principal Amount or Par Value [16],[23],[32]         $ 18,161              
Spread [16],[32]         5.50%     5.50%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32]     18,161                  
Fair value, ending balance [16],[32]         $ 18,161              
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien - Drawn                        
Principal Amount or Par Value $ 732 [19],[20],[21],[22]   $ 732 [19],[20],[21],[22]   $ 2,360 [16],[23],[24],[32]              
Spread 5.50% [19],[20],[22]   5.50% [19],[20],[22]   5.50% [16],[24],[32] 5.50% [19],[20],[22] 5.50% [19],[20],[22] 5.50% [16],[24],[32]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[24],[32]     $ 2,360                  
Fair value, ending balance $ 732 [19],[20],[22]   732 [19],[20],[22]   $ 2,360 [16],[24],[32]              
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 1,098   1,098                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien - Undrawn 1                        
Principal Amount or Par Value [16],[23],[24],[32]         1,865              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[24],[32]     0                  
Fair value, ending balance [16],[24],[32]         0              
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         1,830              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien 1                        
Principal Amount or Par Value [19],[21],[31] $ 22,227   $ 22,227                  
Spread [19],[31] 5.50%   5.50%     5.50% 5.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[31] $ 22,227   $ 22,227                  
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien 2                        
Principal Amount or Par Value [19],[20],[21],[29] $ 510   $ 510                  
Spread [19],[20],[29] 5.50%   5.50%     5.50% 5.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 510   $ 510                  
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien - Undrawn                        
Principal Amount or Par Value 486 [19],[20],[21],[22]   486 [19],[20],[21],[22]   486 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien 1                        
Principal Amount or Par Value $ 22,219 [19],[21],[31]   $ 22,219 [19],[21],[31]   $ 22,388 [16],[23],[32]              
Spread 5.75% [19],[31]   5.75% [19],[31]   5.75% [16],[32] 5.75% [19],[31] 5.75% [19],[31] 5.75% [16],[32]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32]     $ 22,388                  
Fair value, ending balance $ 22,219 [19],[31]   22,219 [19],[31]   $ 22,388 [16],[32]              
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien 2                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 8,258              
Spread [16],[27],[28]         5.75%     5.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     8,258                  
Fair value, ending balance [16],[27],[28]         $ 8,258              
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien 2                        
Principal Amount or Par Value [19],[21],[25],[26] $ 8,196   $ 8,196                  
Spread [19],[25],[26] 5.75%   5.75%     5.75% 5.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 8,196   $ 8,196                  
Investment, Identifier [Axis]: PPVA Black Elk (Equity) LLC, Subordinated                        
Principal Amount or Par Value $ 14,500 [19],[20],[21]   $ 14,500 [19],[20],[21]   $ 14,500 [16],[17],[23]             $ 20,000
Spread 0.00% [19],[20]   0.00% [19],[20]   0.00% [16],[17] 0.00% [19],[20] 0.00% [19],[20] 0.00% [16],[17]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     $ 6,525                  
Fair value, ending balance $ 6,525 [19],[20]   6,525 [19],[20]   $ 6,525 [16],[17]              
Investment, Identifier [Axis]: PPVA Fund, L.P., Collateralized Financing                        
Principal Amount or Par Value 0 [21],[39],[67]   0 [21],[39],[67]   $ 0 [23],[40],[68]              
Spread [40],[68]         0.00%     0.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [40],[68]     0                  
Fair value, ending balance 0 [39],[67]   0 [39],[67]   $ 0 [40],[68]              
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 7,654              
Spread [16],[27],[28]         5.25%     5.25%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     7,635                  
Fair value, ending balance [16],[27],[28]         $ 7,635              
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien - Drawn                        
Principal Amount or Par Value $ 312 [20],[21],[22],[29]   $ 312 [20],[21],[22],[29]   $ 258 [16],[17],[23],[24],[30]              
Spread 5.25% [20],[22],[29]   5.25% [20],[22],[29]   5.25% [16],[17],[24],[30] 5.25% [20],[22],[29] 5.25% [20],[22],[29] 5.25% [16],[17],[24],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[30]     $ 258                  
Fair value, ending balance $ 312 [20],[22],[29]   312 [20],[22],[29]   $ 258 [16],[17],[24],[30]              
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien - Undrawn                        
Principal Amount or Par Value [20],[21],[22] 589   589                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [20],[22] 0   0                  
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [16],[17],[23],[24]         643              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (2)                  
Fair value, ending balance [16],[17],[24]         (2)              
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         1,201              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (3)                  
Fair value, ending balance [16],[17],[24]         (3)              
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien 1                        
Principal Amount or Par Value [21],[25],[26] $ 7,596   $ 7,596                  
Spread [25],[26] 5.25%   5.25%     5.25% 5.25%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [25],[26] $ 7,596   $ 7,596                  
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien 2                        
Principal Amount or Par Value [20],[21] $ 622   $ 622                  
Spread [20] 5.25%   5.25%     5.25% 5.25%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [20] $ 621   $ 621                  
Investment, Identifier [Axis]: Permian Trust, First lien                        
Principal Amount or Par Value 3,409 [8],[19],[20],[21]   3,409 [8],[19],[20],[21]   3,409 [5],[16],[17],[23]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [5],[16],[17]     0                  
Fair value, ending balance 0 [8],[19],[20]   0 [8],[19],[20]   0 [5],[16],[17]              
Investment, Identifier [Axis]: Permian Trust, Trust Claim                        
Principal Amount or Par Value 247 [8],[19],[21],[69]   247 [8],[19],[21],[69]   247 [5],[16],[23],[70]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [5],[16],[70]     0                  
Fair value, ending balance 0 [8],[19],[69]   0 [8],[19],[69]   0 [5],[16],[70]              
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien                        
Principal Amount or Par Value $ 27,932 [19],[20],[21],[29]   $ 27,932 [19],[20],[21],[29]   $ 28,145 [16],[23],[27],[28]              
Spread 6.00% [19],[20],[29]   6.00% [19],[20],[29]   6.00% [16],[27],[28] 6.00% [19],[20],[29] 6.00% [19],[20],[29] 6.00% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 28,145                  
Fair value, ending balance $ 26,717 [19],[20],[29]   26,717 [19],[20],[29]   $ 28,145 [16],[27],[28]              
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value 3,708 [19],[20],[21],[22]   3,708 [19],[20],[21],[22]   3,708 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance (161) [19],[20],[22]   (161) [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value 3,708 [19],[20],[21],[22]   3,708 [19],[20],[21],[22]   3,708 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance $ (161) [19],[20],[22]   $ (161) [19],[20],[22]   $ 0 [16],[17],[24]              
Investment, Identifier [Axis]: Pioneer Buyer I, LLC, First lien                        
Number of investments held | investment 2   2   2 2 2 2        
Investment, Identifier [Axis]: Pioneer Buyer I, LLC, First lien - Undrawn                        
Principal Amount or Par Value $ 3,284 [19],[20],[21],[22],[71]   $ 3,284 [19],[20],[21],[22],[71]   $ 3,284 [16],[17],[23],[24],[72]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[72]     0                  
Fair value, ending balance 0 [19],[20],[22],[71]   0 [19],[20],[22],[71]   0 [16],[17],[24],[72]              
Investment, Identifier [Axis]: Pioneer Buyer I, LLC, First lien 1                        
Principal Amount or Par Value $ 23,089 [19],[20],[21],[29]   $ 23,089 [19],[20],[21],[29]   $ 23,089 [16],[17],[23],[30]              
Spread 6.00% [19],[20],[29]   6.00% [19],[20],[29]   6.50% [16],[17],[30] 6.00% [19],[20],[29] 6.00% [19],[20],[29] 6.50% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 23,089                  
Fair value, ending balance $ 23,089 [19],[20],[29]   23,089 [19],[20],[29]   $ 23,089 [16],[17],[30]              
Investment, Identifier [Axis]: Pioneer Buyer I, LLC, First lien 2                        
Principal Amount or Par Value $ 2,374 [19],[20],[21]   $ 2,374 [19],[20],[21]   $ 2,374 [16],[17],[23],[30]              
Spread 6.00% [19],[20]   6.00% [19],[20]   6.50% [16],[17],[30] 6.00% [19],[20] 6.00% [19],[20] 6.50% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 2,374                  
Fair value, ending balance $ 2,374 [19],[20]   2,374 [19],[20]   $ 2,374 [16],[17],[30]              
Investment, Identifier [Axis]: Pioneer Topco I, L.P., Class A-2 common units                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[71],[73] 2,086   2,086                  
Investment, Identifier [Axis]: Pioneer Topco I, L.P., Ordinary shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[72],[74]     2,000                  
Fair value, ending balance [16],[72],[74]         2,000              
Investment, Identifier [Axis]: Planview Parent, Inc., Second lien                        
Principal Amount or Par Value $ 9,231 [19],[20],[21],[29]   $ 9,231 [19],[20],[21],[29]   $ 9,231 [23],[27],[28]              
Spread 5.75% [19],[20],[29]   5.75% [19],[20],[29]   5.75% [27],[28] 5.75% [19],[20],[29] 5.75% [19],[20],[29] 5.75% [27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [27],[28]     $ 9,208                  
Fair value, ending balance $ 8,952 [19],[20],[29]   8,952 [19],[20],[29]   $ 9,208 [27],[28]              
Investment, Identifier [Axis]: Power Grid Holdings, Inc., First lien                        
Principal Amount or Par Value $ 22,218 [19],[21],[31]   $ 22,218 [19],[21],[31]   $ 22,387 [16],[23],[32]              
Spread 4.75% [19],[31]   4.75% [19],[31]   4.75% [16],[32] 4.75% [19],[31] 4.75% [19],[31] 4.75% [16],[32]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32]     $ 22,387                  
Fair value, ending balance $ 22,218 [19],[31]   22,218 [19],[31]   $ 22,387 [16],[32]              
Investment, Identifier [Axis]: Power Grid Holdings, Inc., First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22] $ 515   $ 515                  
Spread [19],[20],[22] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 515   $ 515                  
Investment, Identifier [Axis]: Power Grid Holdings, Inc., First lien - Undrawn                        
Principal Amount or Par Value 3,775 [19],[20],[21],[22]   3,775 [19],[20],[21],[22]   4,289 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Project Accelerate Parent, LLC, First lien                        
Principal Amount or Par Value $ 10,440 [19],[21],[45]   $ 10,440 [19],[21],[45]   $ 10,519 [16],[23],[44]              
Spread 5.25% [19],[45]   5.25% [19],[45]   5.25% [16],[44] 5.25% [19],[45] 5.25% [19],[45] 5.25% [16],[44]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     $ 10,519                  
Fair value, ending balance $ 10,441 [19],[45]   10,441 [19],[45]   $ 10,519 [16],[44]              
Investment, Identifier [Axis]: Project Accelerate Parent, LLC, First lien - Undrawn                        
Principal Amount or Par Value 1,510 [19],[20],[21],[22]   1,510 [19],[20],[21],[22]   1,510 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Project Essential Super Parent, Inc., Preferred shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     14,833                  
Fair value, ending balance [16],[17]         14,833              
Investment, Identifier [Axis]: RLG Holdings, LLC, First lien                        
Principal Amount or Par Value [23],[27],[28]         $ 3,970              
Spread [27],[28]         5.00%     5.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [27],[28]     3,934                  
Fair value, ending balance [27],[28]         $ 3,934              
Investment, Identifier [Axis]: RLG Holdings, LLC, First lien 1                        
Principal Amount or Par Value [21],[25],[26] $ 3,939   $ 3,939                  
Spread [25],[26] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [25],[26] $ 3,315   $ 3,315                  
Investment, Identifier [Axis]: RLG Holdings, LLC, First lien 2                        
Principal Amount or Par Value [21],[25],[26] $ 1,067   $ 1,067                  
Spread [25],[26] 4.25%   4.25%     4.25% 4.25%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [25],[26] $ 883   $ 883                  
Investment, Identifier [Axis]: RailPros Parent, LLC, First lien                        
Principal Amount or Par Value [19],[21],[25],[26] $ 5,843   $ 5,843                  
Spread [19],[25],[26] 4.50%   4.50%     4.50% 4.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 5,813   $ 5,813                  
Investment, Identifier [Axis]: RailPros Parent, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] 899   899                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (4)   (4)                  
Investment, Identifier [Axis]: RailPros Parent, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 1,798   1,798                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (9)   (9)                  
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC, Trust Claim 1                        
Principal Amount or Par Value 152 [19],[21],[26]   152 [19],[21],[26]   $ 152 [16],[23],[28]              
Spread [16],[28]         0.00%     0.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[28]     152                  
Fair value, ending balance 152 [19],[26]   152 [19],[26]   $ 152 [16],[28]              
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC, Trust Claim 2                        
Principal Amount or Par Value 52 [19],[20],[21]   52 [19],[20],[21]   $ 52 [16],[17],[23]              
Spread [16],[17]         0.00%     0.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     52                  
Fair value, ending balance 52 [19],[20]   52 [19],[20]   $ 52 [16],[17]              
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC, Warrants 1                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[28]     327                  
Fair value, ending balance 272 [19],[26]   272 [19],[26]   327 [16],[28]              
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC, Warrants 2                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     112                  
Fair value, ending balance 93 [19],[20]   93 [19],[20]   112 [16],[17]              
Investment, Identifier [Axis]: Riskonnect Parent, LLC, First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24]         6,349              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Riskonnect Parent, LLC, First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 6,349   6,349                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Rithum Holdings, Inc. (fka CommerceHub, Inc.), First lien                        
Principal Amount or Par Value [21],[25],[26] $ 7,111   $ 7,111                  
Spread [25],[26] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [25],[26] $ 7,118   $ 7,118                  
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24]         384              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien - Drawn                        
Principal Amount or Par Value $ 166 [19],[20],[21],[22]   $ 166 [19],[20],[21],[22]   $ 128 [16],[17],[23],[24]              
Spread 3.75% [19],[20],[22]   3.75% [19],[20],[22]   4.25% [16],[17],[24] 3.75% [19],[20],[22] 3.75% [19],[20],[22] 4.25% [16],[17],[24]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     $ 128                  
Fair value, ending balance $ 166 [19],[20],[22]   166 [19],[20],[22]   $ 128 [16],[17],[24]              
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien 1                        
Principal Amount or Par Value $ 7,390 [19],[21],[25],[26]   $ 7,390 [19],[21],[25],[26]   $ 7,446 [16],[23],[27],[28]              
Spread 4.75% [19],[25],[26]   4.75% [19],[25],[26]   5.25% [16],[27],[28] 4.75% [19],[25],[26] 4.75% [19],[25],[26] 5.25% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 7,446                  
Fair value, ending balance $ 7,390 [19],[25],[26]   7,390 [19],[25],[26]   $ 7,446 [16],[27],[28]              
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien 2                        
Principal Amount or Par Value $ 1,511 [19],[20],[21],[29]   $ 1,511 [19],[20],[21],[29]   $ 1,523 [16],[17],[23],[30]              
Spread 4.75% [19],[20],[29]   4.75% [19],[20],[29]   5.25% [16],[17],[30] 4.75% [19],[20],[29] 4.75% [19],[20],[29] 5.25% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 1,523                  
Fair value, ending balance $ 1,511 [19],[20],[29]   1,511 [19],[20],[29]   $ 1,523 [16],[17],[30]              
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien- Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 345   345                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Sierra Enterprises, LLC, First lien                        
Principal Amount or Par Value $ 21,411 [19],[21],[25],[26]   $ 21,411 [19],[21],[25],[26]   $ 42,450 [16],[17],[23],[30]              
Spread 6.00% [19],[25],[26]   6.00% [19],[25],[26]   6.75% [16],[17],[30] 6.00% [19],[25],[26] 6.00% [19],[25],[26] 6.75% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 42,450                  
Fair value, ending balance $ 21,250 [19],[25],[26]   21,250 [19],[25],[26]   $ 42,450 [16],[17],[30]              
Investment, Identifier [Axis]: Sierra Enterprises, LLC, First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 2,717   2,717                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (20)   (20)                  
Investment, Identifier [Axis]: Sierra Hamilton Holdings Corporation, Ordinary shares 1                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [5],[16],[28]     1,799                  
Fair value, ending balance 1,799 [8],[19],[26]   1,799 [8],[19],[26]   1,799 [5],[16],[28]              
Investment, Identifier [Axis]: Sierra Hamilton Holdings Corporation, Ordinary shares 2                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [5],[16],[17]     201                  
Fair value, ending balance 201 [8],[19],[20]   201 [8],[19],[20]   201 [5],[16],[17]              
Investment, Identifier [Axis]: Specialtycare, Inc., First lien - Drawn                        
Principal Amount or Par Value [16],[17],[23],[24],[30]         $ 324              
Spread [16],[17],[24],[30]         4.00%     4.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24],[30]     315                  
Fair value, ending balance [16],[17],[24],[30]         $ 315              
Investment, Identifier [Axis]: Specialtycare, Inc., First lien - Undrawn                        
Principal Amount or Par Value [16],[17],[23],[24]         235              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (7)                  
Fair value, ending balance [16],[17],[24]         (7)              
Investment, Identifier [Axis]: Specialtycare, Inc., First lien 1                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 10,247              
Spread [16],[27],[28]         5.75%     5.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     9,953                  
Fair value, ending balance [16],[27],[28]         $ 9,953              
Investment, Identifier [Axis]: Specialtycare, Inc., First lien 2                        
Principal Amount or Par Value [16],[17],[23],[30]         $ 77              
Spread [16],[17],[30]         5.75%     5.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     75                  
Fair value, ending balance [16],[17],[30]         $ 75              
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc.                        
Principal Amount or Par Value 24,733   24,733                  
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc., Preferred shares 1                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32]     16,450                  
Fair value, ending balance [16],[32]         16,450              
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc., Preferred shares 2                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     5,671                  
Fair value, ending balance [16],[17],[30]         5,671              
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc., Series A preferred shares 1                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[31] 17,609   17,609                  
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc., Series A preferred shares 2                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] 6,070   6,070                  
Investment, Identifier [Axis]: Syndigo LLC, Second lien 1                        
Principal Amount or Par Value [16],[23],[32]         $ 22,500              
Spread [16],[32]         8.00%     8.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32]     22,500                  
Fair value, ending balance [16],[32]         $ 22,500              
Investment, Identifier [Axis]: Syndigo LLC, Second lien 2                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 5,697              
Spread [16],[27],[28]         8.00%     8.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     5,697                  
Fair value, ending balance [16],[27],[28]         $ 5,697              
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., First lien - Undrawn                        
Principal Amount or Par Value 2,695 [19],[20],[21],[22]   2,695 [19],[20],[21],[22]   2,695 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., First lien 1                        
Principal Amount or Par Value $ 12,631 [19],[21],[26]   $ 12,631 [19],[21],[26]   12,327 [16],[23],[28]              
Spread [19],[26],[35] 2.00%   2.00%     2.00% 2.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[28]     $ 10,402                  
Fair value, ending balance $ 8,161 [19],[26]   8,161 [19],[26]   10,402 [16],[28]              
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., First lien 2                        
Principal Amount or Par Value $ 10,169 [19],[20],[21],[29]   $ 10,169 [19],[20],[21],[29]   9,925 [16],[17],[23]              
Spread [19],[20],[29],[35] 2.00%   2.00%     2.00% 2.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     $ 8,374                  
Fair value, ending balance $ 6,570 [19],[20],[29]   6,570 [19],[20],[29]   8,374 [16],[17]              
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., First lien 3                        
Principal Amount or Par Value $ 4,036 [19],[20],[21],[29]   $ 4,036 [19],[20],[21],[29]   $ 2,843 [16],[17],[23]              
Spread 1.00% [19],[20],[29],[35]   1.00% [19],[20],[29],[35]   2.00% [16],[17],[36] 1.00% [19],[20],[29],[35] 1.00% [19],[20],[29],[35] 2.00% [16],[17],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     $ 2,351                  
Fair value, ending balance $ 2,581 [19],[20],[29]   2,581 [19],[20],[29]   $ 2,351 [16],[17]              
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., Subordinated 1                        
Principal Amount or Par Value 328 [19],[21],[26]   328 [19],[21],[26]   302 [16],[23],[28]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[28]     302                  
Fair value, ending balance 328 [19],[26]   328 [19],[26]   302 [16],[28]              
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., Subordinated 2                        
Principal Amount or Par Value 316 [19],[20],[21]   316 [19],[20],[21]   291 [16],[17],[23]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     291                  
Fair value, ending balance 316 [19],[20]   316 [19],[20]   291 [16],[17]              
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC, Class B-1 Common Shares                        
Principal Amount or Par Value 48,080   48,080                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [8],[19],[20] 40,481   40,481                  
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC, Class B-2 Common Shares                        
Principal Amount or Par Value 29,707   29,707                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [8],[19],[20] 0   0                  
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC, Ordinary shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [5],[16],[17]     59,978                  
Fair value, ending balance [5],[16],[17]         59,978              
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC, Preferred shares                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [5],[16],[17]     9,352                  
Fair value, ending balance [5],[16],[17]         9,352              
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC, Series C-2 Preferred Units                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [8],[19],[20] 8,404   8,404                  
Investment, Identifier [Axis]: Tennessee Bidco Limited, First lien                        
Principal Amount or Par Value [16],[17],[23],[30],[38]         $ 19,418              
Spread [16],[17],[30],[36],[38]         3.50%     3.50%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30],[38]     19,321                  
Fair value, ending balance [16],[17],[30],[38]         $ 19,321              
Investment, Identifier [Axis]: Tennessee Bidco Limited, First lien 1                        
Principal Amount or Par Value [19],[20],[21],[29] $ 19,815   $ 19,815                  
Spread [19],[20],[29],[35] 3.50%   3.50%     3.50% 3.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 19,815   $ 19,815                  
Investment, Identifier [Axis]: Tennessee Bidco Limited, First lien 2                        
Principal Amount or Par Value [19],[21],[25],[26] $ 16,245   $ 16,245                  
Spread [19],[25],[26],[35] 3.50%   3.50%     3.50% 3.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 16,245   $ 16,245                  
Investment, Identifier [Axis]: Tennessee Bidco Limited, First lien 3                        
Principal Amount or Par Value [19],[21],[25],[26] $ 881   $ 881                  
Spread [19],[25],[26],[35] 3.50%   3.50%     3.50% 3.50%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 881   $ 881                  
Investment, Identifier [Axis]: TigerConnect, Inc., First lien                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 29,868              
Spread [16],[27],[28],[36]         3.38%     3.38%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     29,868                  
Fair value, ending balance [16],[27],[28]         $ 29,868              
Investment, Identifier [Axis]: TigerConnect, Inc., First lien - Drawn                        
Principal Amount or Par Value $ 3,273 [19],[21],[22],[26]   $ 3,273 [19],[21],[22],[26]   $ 2,440 [16],[23],[24],[28]              
Spread 3.38% [19],[22],[26],[35]   3.38% [19],[22],[26],[35]   3.38% [16],[24],[28],[36] 3.38% [19],[22],[26],[35] 3.38% [19],[22],[26],[35] 3.38% [16],[24],[28],[36]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[24],[28]     $ 2,440                  
Fair value, ending balance $ 3,273 [19],[22],[26]   3,273 [19],[22],[26]   $ 2,440 [16],[24],[28]              
Investment, Identifier [Axis]: TigerConnect, Inc., First lien - Undrawn 1                        
Principal Amount or Par Value 468 [19],[21],[22],[26]   468 [19],[21],[22],[26]   1,301 [16],[23],[24],[28]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[24],[28]     0                  
Fair value, ending balance 0 [19],[22],[26]   0 [19],[22],[26]   0 [16],[24],[28]              
Investment, Identifier [Axis]: TigerConnect, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value 46 [19],[20],[21],[22]   46 [19],[20],[21],[22]   4,267 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: TigerConnect, Inc., First lien - Undrawn 3                        
Principal Amount or Par Value [19],[20],[21],[22] 4,267   4,267                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: TigerConnect, Inc., First lien 1                        
Principal Amount or Par Value [19],[20],[21],[29] $ 29,868   $ 29,868                  
Spread [19],[20],[29],[35] 3.38%   3.38%     3.38% 3.38%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 29,868   $ 29,868                  
Investment, Identifier [Axis]: TigerConnect, Inc., First lien 2                        
Principal Amount or Par Value [19],[20],[21],[29] $ 3,054   $ 3,054                  
Spread [19],[20],[29],[35] 3.38%   3.38%     3.38% 3.38%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 3,054   $ 3,054                  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 1,501   1,501                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien - Undrawn 1                        
Principal Amount or Par Value [16],[23],[24],[27],[28]         785              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[24],[27],[28]     0                  
Fair value, ending balance [16],[24],[27],[28]         0              
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien - Undrawn 2                        
Principal Amount or Par Value [16],[17],[23],[24]         1,501              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance [16],[17],[24]         0              
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien 1                        
Principal Amount or Par Value $ 15,343 [19],[21],[25],[26]   $ 15,343 [19],[21],[25],[26]   $ 15,382 [16],[23],[27],[28]              
Spread 4.25% [19],[25],[26]   4.25% [19],[25],[26]   5.25% [16],[27],[28] 4.25% [19],[25],[26] 4.25% [19],[25],[26] 5.25% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 15,382                  
Fair value, ending balance $ 15,343 [19],[25],[26]   15,343 [19],[25],[26]   $ 15,382 [16],[27],[28]              
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien 2                        
Principal Amount or Par Value $ 5,145 [19],[21],[25],[26]   $ 5,145 [19],[21],[25],[26]   $ 4,467 [16],[23],[27],[28]              
Spread 4.25% [19],[25],[26]   4.25% [19],[25],[26]   5.25% [16],[27],[28] 4.25% [19],[25],[26] 4.25% [19],[25],[26] 5.25% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 4,467                  
Fair value, ending balance $ 5,145 [19],[25],[26]   5,145 [19],[25],[26]   $ 4,467 [16],[27],[28]              
Investment, Identifier [Axis]: USRP Holdings, Inc., First lien - Undrawn                        
Principal Amount or Par Value 893 [19],[20],[21],[22]   893 [19],[20],[21],[22]   893 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: USRP Holdings, Inc., First lien 1                        
Principal Amount or Par Value $ 6,930 [19],[20],[21],[29]   $ 6,930 [19],[20],[21],[29]   $ 6,984 [16],[17],[23],[30]              
Spread 5.00% [19],[20],[29]   5.00% [19],[20],[29]   5.00% [16],[17],[30] 5.00% [19],[20],[29] 5.00% [19],[20],[29] 5.00% [16],[17],[30]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     $ 6,984                  
Fair value, ending balance $ 6,930 [19],[20],[29]   6,930 [19],[20],[29]   $ 6,984 [16],[17],[30]              
Investment, Identifier [Axis]: USRP Holdings, Inc., First lien 2                        
Principal Amount or Par Value $ 5,498 [19],[21],[25],[26]   $ 5,498 [19],[21],[25],[26]   $ 5,541 [16],[23],[27],[28]              
Spread 5.00% [19],[25],[26]   5.00% [19],[25],[26]   5.00% [16],[27],[28] 5.00% [19],[25],[26] 5.00% [19],[25],[26] 5.00% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 5,541                  
Fair value, ending balance $ 5,498 [19],[25],[26]   5,498 [19],[25],[26]   $ 5,541 [16],[27],[28]              
Investment, Identifier [Axis]: Ultimus Group Midco, LLC, First lien                        
Principal Amount or Par Value [19],[20],[21],[29] $ 9,116   $ 9,116                  
Spread [19],[20],[29] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 9,070   $ 9,070                  
Investment, Identifier [Axis]: Ultimus Group Midco, LLC, First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] 3,039   3,039                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: Ultimus Group Midco, LLC, First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 1,139   1,139                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (6)   (6)                  
Investment, Identifier [Axis]: UniTek Global Services, Inc., Ordinary shares 1                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[28]     0                  
Fair value, ending balance 0 [14],[19],[26]   0 [14],[19],[26]   0 [9],[16],[28]              
Investment, Identifier [Axis]: UniTek Global Services, Inc., Ordinary shares 2                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17]     0                  
Fair value, ending balance 0 [14],[19],[20]   0 [14],[19],[20]   0 [9],[16],[17]              
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 1                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17]     20,646                  
Fair value, ending balance 61,415 [14],[19],[20]   61,415 [14],[19],[20]   20,646 [9],[16],[17]              
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 2                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17]     12,682                  
Fair value, ending balance 8,675 [14],[19],[20]   8,675 [14],[19],[20]   12,682 [9],[16],[17]              
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 3                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17]     3,080                  
Fair value, ending balance 0 [14],[19],[26]   0 [14],[19],[26]   3,080 [9],[16],[17]              
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 4                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[28]     0                  
Fair value, ending balance 0 [14],[19],[20]   0 [14],[19],[20]   0 [9],[16],[28]              
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 5                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17]     0                  
Fair value, ending balance [9],[16],[17]         0              
Investment, Identifier [Axis]: UniTek Global Services, Inc., Second lien 1                        
Principal Amount or Par Value [9],[16],[17],[23]         15,608              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17]     15,459                  
Fair value, ending balance [9],[16],[17]         15,459              
Investment, Identifier [Axis]: UniTek Global Services, Inc., Second lien 2                        
Principal Amount or Par Value [9],[16],[17],[23]         6,919              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17]     6,853                  
Fair value, ending balance [9],[16],[17]         6,853              
Investment, Identifier [Axis]: UniTek Global Services, Inc., Warrants                        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [9],[16],[17]     48,804                  
Fair value, ending balance [9],[16],[17]         48,804              
Investment, Identifier [Axis]: Vehlo Purchaser, LLC, First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22] $ 6,073   $ 6,073                  
Spread [19],[20],[22] 5.00%   5.00%     5.00% 5.00%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 6,042   $ 6,042                  
Investment, Identifier [Axis]: Vehlo Purchaser, LLC, First lien - Undrawn                        
Principal Amount or Par Value [19],[20],[21],[22] 3,897   3,897                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (19)   (19)                  
Investment, Identifier [Axis]: Viper Bidco,Inc., First lien                        
Principal Amount or Par Value $ 16,059   $ 16,059                  
Investment, Identifier [Axis]: Viper Bidco. Inc., First lien                        
Principal Amount or Par Value         $ 12,030 [16],[17],[23],[30],[65]   £ 11,940 [19],[20],[21],[29],[64]          
Spread 4.75% [19],[20],[29],[64]   4.75% [19],[20],[29],[64]   5.00% [16],[17],[30],[65] 4.75% [19],[20],[29],[64] 4.75% [19],[20],[29],[64] 5.00% [16],[17],[30],[65]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30],[65]     $ 14,981                  
Fair value, ending balance $ 15,979 [19],[20],[29],[64]   15,979 [19],[20],[29],[64]   $ 14,981 [16],[17],[30],[65]              
Investment, Identifier [Axis]: Viper Bidco. Inc., First lien - Undrawn 1                        
Principal Amount or Par Value 3,320 [19],[20],[21],[22]   3,320 [19],[20],[21],[22]   4,150 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance (17) [19],[20],[22]   (17) [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Viper Bidco. Inc., First lien - Undrawn 2                        
Principal Amount or Par Value 4,150 [19],[20],[21],[22]   4,150 [19],[20],[21],[22]   3,320 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (17)                  
Fair value, ending balance (21) [19],[20],[22]   (21) [19],[20],[22]   (17) [16],[17],[24]              
Investment, Identifier [Axis]: Viper Bidco. Inc., First lien 1                        
Principal Amount or Par Value         15,057              
Investment, Identifier [Axis]: WEG Sub Intermediate Holdings, LLC, Subordinated                        
Principal Amount or Par Value [19],[20],[21] 4,515   4,515                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20] 4,515   4,515                  
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien - Undrawn                        
Principal Amount or Par Value 2,040 [19],[20],[21],[22]   2,040 [19],[20],[21],[22]   2,040 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     0                  
Fair value, ending balance 0 [19],[20],[22]   0 [19],[20],[22]   0 [16],[17],[24]              
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 1                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 15,593              
Spread [16],[27],[28]         5.00%     5.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     15,593                  
Fair value, ending balance [16],[27],[28]         $ 15,593              
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 2                        
Principal Amount or Par Value [16],[17],[23],[30]         $ 11,908              
Spread [16],[17],[30]         5.00%     5.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     11,908                  
Fair value, ending balance [16],[17],[30]         $ 11,908              
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 3                        
Principal Amount or Par Value [16],[23],[27],[28]         $ 6,659              
Spread [16],[27],[28]         5.00%     5.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     6,659                  
Fair value, ending balance [16],[27],[28]         $ 6,659              
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 4                        
Principal Amount or Par Value [16],[17],[23],[30]         $ 1,228              
Spread [16],[17],[30]         5.00%     5.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     1,228                  
Fair value, ending balance [16],[17],[30]         $ 1,228              
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 5                        
Principal Amount or Par Value [16],[17],[23],[30]         $ 824              
Spread [16],[17],[30]         5.00%     5.00%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[30]     824                  
Fair value, ending balance [16],[17],[30]         $ 824              
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, Subordinated                        
Principal Amount or Par Value [16],[17],[23]         4,231              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17]     4,231                  
Fair value, ending balance [16],[17]         4,231              
Investment, Identifier [Axis]: Xactly Corporation, First lien                        
Principal Amount or Par Value $ 22,500 [19],[21],[31]   $ 22,500 [19],[21],[31]   $ 22,500 [16],[23],[32]              
Spread 6.25% [19],[31]   6.25% [19],[31]   6.25% [16],[32] 6.25% [19],[31] 6.25% [19],[31] 6.25% [16],[32]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[32]     $ 22,250                  
Fair value, ending balance $ 22,241 [19],[31]   22,241 [19],[31]   $ 22,250 [16],[32]              
Investment, Identifier [Axis]: Xactly Corporation, First lien - Undrawn                        
Principal Amount or Par Value 992 [19],[20],[21],[22]   992 [19],[20],[21],[22]   992 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (11)                  
Fair value, ending balance (11) [19],[20],[22]   (11) [19],[20],[22]   (11) [16],[17],[24]              
Investment, Identifier [Axis]: YLG Holding, Inc, First lien 2                        
Principal Amount or Par Value [19],[21],[25],[26] $ 4,320   $ 4,320                  
Spread [19],[25],[26] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[25],[26] $ 4,320   $ 4,320                  
Investment, Identifier [Axis]: YLG Holding, Inc, First lien - Drawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] $ 19   $ 19                  
Spread [19],[20],[22] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 19   $ 19                  
Investment, Identifier [Axis]: YLG Holding, Inc, First lien - Drawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] $ 395   $ 395                  
Spread [19],[20],[22] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] $ 395   $ 395                  
Investment, Identifier [Axis]: YLG Holding, Inc, First lien 1                        
Principal Amount or Par Value [19],[21],[45] $ 21,716   $ 21,716                  
Spread [19],[45] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[45] $ 21,716   $ 21,716                  
Investment, Identifier [Axis]: YLG Holdings, Inc., First lien                        
Principal Amount or Par Value [16],[23],[44]         $ 21,825              
Spread [16],[44]         4.75%     4.75%        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[44]     21,825                  
Fair value, ending balance [16],[44]         $ 21,825              
Investment, Identifier [Axis]: YLG Holdings, Inc., First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] 291   291                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: YLG Holdings, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 271   271                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] 0   0                  
Investment, Identifier [Axis]: eResearchTechnology, Inc., First lien - Drawn                        
Principal Amount or Par Value [19],[20],[21],[22],[29] $ 301   $ 301                  
Spread [19],[20],[22],[29] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22],[29] $ 298   $ 298                  
Investment, Identifier [Axis]: eResearchTechnology, Inc., First lien - Undrawn 1                        
Principal Amount or Par Value [19],[20],[21],[22] 1,074   1,074                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (11)   (11)                  
Investment, Identifier [Axis]: eResearchTechnology, Inc., First lien - Undrawn 2                        
Principal Amount or Par Value [19],[20],[21],[22] 1,847   1,847                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[22] (18)   (18)                  
Investment, Identifier [Axis]: eResearchTechnology, Inc., First lien 1                        
Principal Amount or Par Value [19],[20],[21],[29] $ 11,380   $ 11,380                  
Spread [19],[20],[29] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 11,266   $ 11,266                  
Investment, Identifier [Axis]: eResearchTechnology, Inc., First lien 2                        
Principal Amount or Par Value [19],[20],[21],[29] $ 1,889   $ 1,889                  
Spread [19],[20],[29] 4.75%   4.75%     4.75% 4.75%          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, ending balance [19],[20],[29] $ 1,871   $ 1,871                  
Investment, Identifier [Axis]: iCIMS, Inc., First lien - Drawn                        
Principal Amount or Par Value $ 988 [19],[20],[21],[22]   $ 988 [19],[20],[21],[22]   $ 706 [16],[17],[23],[24]              
Spread 5.75% [19],[20],[22]   5.75% [19],[20],[22]   5.75% [16],[17],[24] 5.75% [19],[20],[22] 5.75% [19],[20],[22] 5.75% [16],[17],[24]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     $ 701                  
Fair value, ending balance $ 964 [19],[20],[22]   964 [19],[20],[22]   $ 701 [16],[17],[24]              
Investment, Identifier [Axis]: iCIMS, Inc., First lien - Undrawn                        
Principal Amount or Par Value 2,542 [19],[20],[21],[22]   2,542 [19],[20],[21],[22]   2,824 [16],[17],[23],[24]              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[17],[24]     (21)                  
Fair value, ending balance (64) [19],[20],[22]   (64) [19],[20],[22]   (21) [16],[17],[24]              
Investment, Identifier [Axis]: iCIMS, Inc., First lien 1                        
Principal Amount or Par Value $ 44,742 [19],[21],[25],[26]   $ 44,742 [19],[21],[25],[26]   $ 44,742 [16],[23],[27],[28]              
Spread 5.75% [19],[25],[26]   5.75% [19],[25],[26]   5.75% [16],[27],[28] 5.75% [19],[25],[26] 5.75% [19],[25],[26] 5.75% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 44,406                  
Fair value, ending balance $ 43,623 [19],[25],[26]   43,623 [19],[25],[26]   $ 44,406 [16],[27],[28]              
Investment, Identifier [Axis]: iCIMS, Inc., First lien 2                        
Principal Amount or Par Value $ 7,366 [19],[21],[25],[26]   $ 7,366 [19],[21],[25],[26]   $ 7,366 [16],[23],[27],[28]              
Spread 6.25% [19],[25],[26]   6.25% [19],[25],[26]   6.25% [16],[27],[28] 6.25% [19],[25],[26] 6.25% [19],[25],[26] 6.25% [16],[27],[28]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                        
Fair value, beginning balance [16],[27],[28]     $ 7,311                  
Fair value, ending balance $ 7,274 [19],[25],[26]   $ 7,274 [19],[25],[26]   $ 7,311 [16],[27],[28]              
[1] New Mountain Finance Corporation (the "Company") generally acquires its investments in private transactions exempt from registration under the Securities Act of 1933, as amended (the "Securities Act"). These investments are generally subject to certain limitations on resale, and may be deemed to be "restricted securities" under the Securities Act.
[2] New Mountain Finance Corporation (the "Company") generally acquires its investments in private transactions exempt from registration under the Securities Act of 1933, as amended (the "Securities Act"). These investments are generally subject to certain limitations on resale, and may be deemed to be "restricted securities" under the Securities Act.
[3] Gross additions include increases in the cost basis of investments resulting from new portfolio investments, payment-in-kind (“PIK”) interest or dividends, the amortization of discounts, reorganizations or restructurings and the movement of an existing portfolio company into this category from a different category.
[4] Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, reorganizations or restructurings and the movement of an existing portfolio company out of this category into a different category.
[5] Denotes investments in which the Company is an “Affiliated Person”, as defined in the Investment Company Act of 1940, as amended (the "1940 Act"), due to owning or holding the power to vote 5.0% or more of the outstanding voting securities of the investment but not controlling the company. Fair value as of December 31, 2024 and December 31, 2023 along with transactions during the year ended December 31, 2024 in which the issuer was a non-controlled/affiliated investment is as follows:
Portfolio CompanyFair Value at December 31, 2023Gross
Additions (A)		Gross
Redemptions
(B)		Net Change In Unrealized Appreciation (Depreciation)Fair Value at December 31, 2024Net Realized Gains (Losses)Interest
Income		Dividend
Income		Other
Income
Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.) / Eagle Infrastructure Super HoldCo, LLC$17,873 $— $(50)$1,333 $19,156 $— $1,432 $— $— 
Sierra Hamilton Holdings Corporation2,000 — — — 2,000 — — — — 
TVG-Edmentum Holdings, LLC / Edmentum Ultimate Holdings, LLC113,786 16,409 — (38,575)91,620 — 3,659 5,843 250 
Total Non-Controlled/Affiliated Investments$133,659 $16,409 $(50)$(37,242)$112,776 $— $5,091 $5,843 $250 
(A)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, payment-in-kind (“PIK”) interest or dividends, the amortization of discounts, reorganizations or restructurings and the movement of an existing portfolio company into this category from a different category.
(B)Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, reorganizations or restructurings and the movement of an existing portfolio company out of this category into a different category.
[6] Gross additions include increases in the cost basis of investments resulting from new portfolio investments, payment-in-kind (“PIK”) interest or dividends, the amortization of discounts, reorganizations or restructurings and the movement of an existing portfolio company into this category from a different category.
[7] Gross redemptions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, reorganizations or restructurings and the movement of an existing portfolio company out of this category into a different category.
[8] Denotes investments in which the Company is an “Affiliated Person”, as defined in the Investment Company Act of 1940, as amended (the "1940 Act"), due to owning or holding the power to vote 5.0% or more of the outstanding voting securities of the investment but not controlling the company. Fair value as of September 30, 2025 and December 31, 2024, along with transactions during the nine months ended September 30, 2025 in which the issuer was a non-controlled/affiliated investment, is as follows:
Portfolio CompanyFair Value at December 31, 2024Gross Additions (A)Gross Redemptions (B)Net Change In Unrealized Appreciation (Depreciation)Fair Value at September 30, 2025Net Realized Gains (Losses)Interest IncomeDividend IncomeOther Income
Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.) / Eagle Infrastructure Super HoldCo, LLC$19,156 $— $— $(820)$18,336 $— $994 $— $— 
Sierra Hamilton Holdings Corporation2,000 — — — 2,000 — — — — 
TVG-Edmentum Holdings, LLC / Edmentum Ultimate Holdings, LLC91,620 5,465 — (22,735)74,350 — 3,171 2,279 188 
Total Non-Controlled/Affiliated Investments$112,776 $5,465 $— $(23,555)$94,686 $— $4,165 $2,279 $188 
(A)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, payment-in-kind (“PIK”) interest or dividends, the amortization of discounts, reorganizations or restructurings and the movement of an existing portfolio company into this category from a different category.
(B)Gross redemptions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, reorganizations or restructurings and the movement of an existing portfolio company out of this category into a different category.
[9] Denotes investments in which the Company is in “Control”, as defined in the 1940 Act, due to owning or holding the power to vote more than 25.0% of the outstanding voting securities of the investment. Fair value as of December 31, 2024 and December 31, 2023 along with transactions during the year ended December 31, 2024 in which the issuer was a controlled investment, is as follows:
Portfolio CompanyFair Value at December 31, 2023Gross
Additions
(A)		Gross
Redemptions
(B)		Net Change In
Unrealized
Appreciation
(Depreciation)		Fair Value at December 31, 2024Net Realized Gains (Losses)Interest
Income		Dividend
Income		Other
Income
Haven Midstream LLC / Haven Midstream Holdings LLC / QID TRH Holdings LLC $3,419 $— $— $(3,419)$— $4,981 $— $— $41 
National HME, Inc./NHME Holdings Corp.3,000 — — — 3,000 — — — — 
New Benevis Topco, LLC / New Benevis Holdco, Inc.135,401 10,595 — (5,894)140,102 — 12,934 — 375 
New Permian Holdco, Inc. / New Permian Holdco, L.L.C.63,170 7,005 — (7,099)63,076 — 5,382 — 500 
NM APP CANADA CORP7 — — (7)— 31 — — — 
NM CLFX LP11,731 — (12,279)548 — (2,461)— 24 845 
NM NL Holdings, L.P.96,071 — (2,123)10,564 104,512 (548)— 8,116 181 
NM GP Holdco, LLC1,048 — (11)(715)322 (3)— 89 — 
NM YI LLC9,550 — — 410 9,960 — — 879 — 
NMFC Senior Loan Program III LLC140,000 20,000 — — 160,000 — — 23,304 — 
NMFC Senior Loan Program IV LLC112,400 — — — 112,400 — — 16,228 — 
UniTek Global Services, Inc.91,999 9,577 — 5,948 107,524 — 3,133 6,446 1,450 
Total Controlled Investments$667,796 $47,177 $(14,413)$336 $700,896 $2,000 $21,449 $55,086 $3,392 

(A)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest or dividends, the amortization of discounts, reorganizations or restructurings and the movement of an existing portfolio company into this category from a different category.
(B)Gross redemptions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, reorganizations or restructurings and the movement of an existing portfolio company out of this category into a different category.
[10] Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest or dividends, the amortization of discounts, reorganizations or restructurings and the movement of an existing portfolio company into this category from a different category.
[11] Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest or dividends, the amortization of discounts, reorganizations or restructurings and the movement of an existing portfolio company into this category from a different category.
[12] Gross redemptions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, reorganizations or restructurings and the movement of an existing portfolio company out of this category into a different category.
[13] Gross redemptions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, reorganizations or restructurings and the movement of an existing portfolio company out of this category into a different category.
[14] Denotes investments in which the Company "controls", as defined in the 1940 Act, due to owning or holding the power to vote more than 25.0% of the outstanding voting securities of the investment. Fair value as of September 30, 2025 and December 31, 2024, along with transactions during the nine months ended September 30, 2025 in which the issuer was a controlled investment, is as follows:
Portfolio Company (1)Fair Value at December 31, 2024Gross Additions (A)Gross Redemptions (B)Net Change In Unrealized Appreciation (Depreciation)Fair Value at September 30, 2025Net Realized Gains (Losses)Interest IncomeDividend IncomeOther Income
National HME, Inc./NHME Holdings Corp.$3,000 $— $— $— $3,000 $— $— $— $— 
New Benevis Topco, LLC / New Benevis Holdco, Inc.140,102 13,606 — (1,916)151,792 — 10,489 — 1,383 
New Permian Holdco, Inc. / New Permian Holdco, L.L.C.63,076 6,159 — (5,901)63,334 — 4,260 — 375 
NM NL Holdings, L.P.104,512 — — 1,366 105,878 — — 6,564 — 
NM GP Holdco, LLC322 — — 71 393 — — 33 — 
NM YI LLC9,960 — — (1,287)8,673 — — 674 — 
NMFC Senior Loan Program III LLC160,000 — — — 160,000 — — 17,000 — 
NMFC Senior Loan Program IV LLC112,400 — — — 112,400 — — 11,521 — 
UniTek Global Services, Inc.107,524 69,314 (60,582)(46,166)70,090 38,898 516 7,781 820 
Total Controlled Investments$700,896 $89,079 $(60,582)$(53,833)$675,560 $38,898 $15,265 $43,573 $2,578 
(A)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest or dividends, the amortization of discounts, reorganizations or restructurings and the movement of an existing portfolio company into this category from a different category.
(B)Gross redemptions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, reorganizations or restructurings and the movement of an existing portfolio company out of this category into a different category.
[15] The Company holds ordinary shares in AAC Lender Holdings, LLC and two first lien term loans, a first lien revolver and subordinated notes in American Achievement Corporation, a partially-owned subsidiary of AAC Lender Holdings, LLC.
[16] The fair value of the Company's investment is determined using unobservable inputs that are significant to the overall fair value measurement. See Note 4. Fair Value, for details.
[17] Investment is held by New Mountain Finance Corporation
[18] The Company holds ordinary shares in AAC Lender Holdings, LLC and two first lien term loans, a first lien revolver and subordinated notes in American Achievement Corporation, a partially-owned subsidiary of AAC Lender Holdings, LLC.
[19] The fair value of the Company's investment is determined using unobservable inputs that are significant to the overall fair value measurement. See Note 4. Fair Value, for details.
[20] Investment is held by New Mountain Finance Corporation
[21] Par amount is denominated in United States Dollar unless otherwise noted, which may include British Pound ("£") and/or Euro ("€").
[22] Par value amounts represent the drawn or undrawn (as indicated in type of investment) portion of revolvers or delayed draws. Cost amounts represent the cash received at settlement date net of the impact of paydowns and cash paid for drawn revolvers or delayed draws.
[23] Par amount is denominated in United States Dollar unless otherwise noted, which may include British Pound ("£") and/or Euro ("€").
[24] Par value amounts represent the drawn or undrawn (as indicated in type of investment) portion of revolving credit facilities or delayed draws. Cost amounts represent the cash received at settlement date net of the impact of paydowns and cash paid for drawn revolvers or delayed draws.
[25] Investment is pledged as collateral for the Holdings Credit Facility, a revolving credit facility among the Company, as the Collateral Manager, New Mountain Finance Holdings, L.L.C. as the Borrower, Wells Fargo Securities, LLC, as the Administrative Agent, and Wells Fargo Bank, National Association, as the Lender and Collateral Custodian.. See Note 7. Borrowings, for details.
[26] Investment is held by New Mountain Finance Holdings, L.L.C.
[27] Investment is pledged as collateral for the Holdings Credit Facility, a revolving credit facility among the Company, as the Collateral Manager, New Mountain Finance Holdings, L.L.C. as the Borrower, Wells Fargo Securities, LLC, as the Administrative Agent, and Wells Fargo Bank, National Association, as the Lender and Collateral Custodian.. See Note 7. Borrowings, for details.
[28] Investment is held by New Mountain Finance Holdings, L.L.C.
[29] Investment is pledged as collateral for the NMFC Credit Facility, a revolving credit facility among the Company as the Borrower, Sumitomo Mitsui Banking Corporation, as administrative agent, sole lead arranger, and sole book runner, and the lenders party thereto. See Note 7. Borrowings, for details.
[30] Investment is pledged as collateral for the NMFC Credit Facility, a revolving credit facility among the Company as the Borrower, Sumitomo Mitsui Banking Corporation, as administrative agent, sole lead arranger, and sole book runner, and the lenders party thereto. See Note 7. Borrowings, for details
[31] Investment is held by New Mountain Finance SBIC, L.P.
[32] Investment is held by New Mountain Finance SBIC, L.P.
[33] The Company holds investments in ACI Parent Inc. and a wholly-owned subsidiary of ACI Parent Inc. The Company holds a first lien term loan, two first lien delayed draws and a first lien revolver in ACI Group Holdings, Inc. and preferred equity in ACI Parent Inc. The Company's preferred equity investment is entitled to receive cumulative preferred dividends that are calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of September 30, 2025, the Company's stated value of it's equity investment, plus unpaid compounded dividends, was $20,249.
[34] The Company holds investments in ACI Parent Inc. and a wholly-owned subsidiary of ACI Parent Inc. The Company holds a first lien term loan, two first lien delayed draws and a first lien revolver in ACI Group Holdings, Inc. and preferred equity in ACI Parent Inc.
[35] All or a portion of interest contains PIK interest. See Note 2. Summary of Significant Accounting Policies-Revenue Recognition, for details.
[36] All or a portion of interest contains PIK interest.
[37] Indicates assets that the Company deems to be “non-qualifying assets” under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70.0% of the Company’s total assets at the time of acquisition of any additional non-qualifying assets. As of September 30, 2025, 15.1% of the Company’s total assets are represented by investments at fair value that are considered non-qualifying assets.
[38] Indicates assets that the Company deems to be “non-qualifying assets” under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70.0% of the Company’s total assets at the time of acquisition of any additional non-qualifying assets. As of December 31, 2024, 14.6% of the Company’s total assets are represented by investments at fair value that are considered non-qualifying assets.
[39] Investment is on non-accrual status as of September 30, 2025. See Note 3. Investments, for details.
[40] Investment is on non-accrual status. See Note 3. Investments, for details.
[41] Investment is held by NMF Ancora Holdings, Inc.
[42] Investment is held by NMF Ancora Holdings, Inc.
[43] The Company holds preferred equity in Bamboo Health Intermediate Holdings, Inc.(fka Appriss Health Intermediate Holdings, Inc.) and holds a first lien term loan and a first lien revolver in Bamboo Health Holdings, LLC (fka Appriss Health, LLC), a wholly-owned subsidiary of Bamboo Health Intermediate Holdings, Inc.
[44] Investment is held by New Mountain Finance SBIC II, L.P.
[45] Investment is held by New Mountain Finance SBIC II, L.P.
[46] The Company's preferred equity investment in Dealer Tire Holdings, LLC is entitled to receive cumulative preferred dividends that are calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of September 30, 2025, the Company's stated value of it's share, plus unpaid compounded dividends, was $84,739.
[47] The Company holds investments in two wholly-owned subsidiaries of Diamond Parent Holdings Corp. The Company holds two first lien term loans, a first lien delayed draw and a first lien revolver in Diligent Corporation and preferred equity in Diligent Preferred Issuer Inc.
[48] The Company holds investments in two wholly-owned subsidiaries of Diamond Parent Holdings Corp. The Company holds two first lien term loans, a first lien delayed draw and a first lien revolver in Diligent Corporation and preferred equity in Diligent Preferred Issuer, Inc. The Company's preferred equity investment is entitled to receive cumulative preferred dividends that are calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of September 30, 2025, the Company's stated value of it's equity investment, plus unpaid compounded dividends, was $15,827.
[49] The Company holds preferred equity in Eclipse Topco, Inc. and a first lien term loan, a first lien revolver and a first lien delayed draw in Eclipse Buyer, Inc., a wholly-owned subsidiary of Eclipse Topco, Inc. The Company's preferred equity investment is entitled to receive cumulative preferred dividends that are calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of September 30, 2025, the Company's stated value of it's equity investment, plus unpaid compounded dividends, was $2,094.
[50] The Company holds preferred equity in Eclipse Topco, Inc. and a first lien term loan, a first lien revolver and a first lien delayed draw in Eclipse Buyer, Inc., a wholly-owned subsidiary of Eclipse Topco, Inc.
[51] The Company holds ordinary shares and Class B-1 and Class B-2 of preferred equity in TVG-Edmentum Holdings, LLC and subordinated notes in Edmentum Ultimate Holdings, LLC, a wholly-owned subsidiary of TVG-Edmentum Holdings, LLC. As of September 30, 2025, the Company's stated value of the Company's Class B-1 and Class B-2 preferred equity investments, plus unpaid compounded dividends, was $48,080 and $29,707, respectively.
[52] The Company holds ordinary shares in FS WhiteWater Holdings, LLC, and a first lien term loan, a first lien revolver, and three first lien delayed draws in FS WhiteWater Borrower, LLC, a partially-owned subsidiary of FS WhiteWater Holdings, LLC.
[53] The Company holds ordinary shares in FS WhiteWater Holdings, LLC, and a first lien term loan, a first lien revolver, and five first lien delayed draws in FS WhiteWater Borrower, LLC, a partially-owned subsidiary of FS WhiteWater Holdings, LLC.
[54] The Company holds an LP Interest in Firebird Co-Invest L.P. and holds a first lien term loan, a first lien delayed and a first lien revolver in Firebird Acquisition Corp, Inc., a wholly-owned subsidiary of Firebird Co-Invest L.P. .
[55] The Company's common equity investment in HBWM Holdings, LLC. is entitled to receive cumulative return that are calculated using the unreturned original investment plus any unpaid capitalized dividends. As of September 30, 2025, the Company's unreturned original investment, plus any unpaid compounded dividends, was $4,767.
[56] Investment is held by NMF HB, Inc.
[57] Investment is held by NMF HB, Inc.
[58] The Company holds preferred equity in Knockout Intermediate Holdings I Inc. and a first lien term loan, a first lien revolver and two first lien delayed draws in Kaseya, Inc., a wholly-owned subsidiary of Knockout Intermediate Holdings I Inc.
[59] The Company's preferred equity investment in Knockout Intermediate Holdings I, Inc. is entitled to receive cumulative preferred dividends that are calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of September 30, 2025, the Company's stated value of it's share, plus unpaid compounded dividends, was $12,400.
[60] The Company holds ordinary shares and warrants in NHME Holdings Corp., as well as a second lien Tranche A Term Loan in National HME, Inc., a wholly-owned subsidiary of NHME Holdings Corp. The second lien Tranche A Term Loan is entitled to receive 20% of the interest earned on the first lien Tranche A Term Loan, which accrues interest at a rate of SOFR + 5.00%, and 20% of the interest earned on the first lien Tranche B Term Loan, which accrues interest at a rate of SOFR + 6.00%.
[61] The Company holds ordinary shares and warrants in NHME Holdings Corp., as well as a second lien Tranche A Term Loan in National HME, Inc., a wholly-owned subsidiary of NHME Holdings Corp. The second lien Tranche A Term Loan is entitled to receive 20% of the interest earned on the first lien Tranche A Term Loan, which accrues interest at a rate of SOFR + 5.00%, and 20% of the interest earned on the first lien Tranche B Term Loan, which accrues interest at a rate of SOFR + 6.00%.
[62] Investment is held by New Mountain Net Lease Corporation.
[63] Investment is held by New Mountain Net Lease Corporation.
[64] Investment is denominated in foreign currency and is translated into U.S. dollars as of the valuation date. As of September 30, 2025, the par value U.S. dollar equivalent of the Viper Bidco, Inc. first lien term loans is $16,059 and the Nelipak Holding Company first lien term loan, undrawn delayed draw term loan, undrawn revolver and drawn revolver is $19,243, $7,522, $1,311 and $92, respectively. See Note 2. Summary of Significant Accounting Policies, for details
[65] Investment is denominated in foreign currency and is translated into U.S. dollars as of the valuation date. As of December 31, 2024, the par value U.S. dollar equivalent of the Viper Bidco, Inc. first lien term loans is $15,057 and the Nelipak Holding Company first lien term loan, drawn revolver, undrawn delayed draw term loan and undrawn revolver is $17,109, $406 $6,638 and $833, respectively. See Note 2. Summary of Significant Accounting Policies, for details.
[66] The Company holds ordinary shares in OA Topco, L.P., and three first lien term loans and a first lien revolver in OA Buyer, Inc., a wholly-owned subsidiary of OA Topco, L.P.
[67] The Company holds one security purchased under a collateralized agreement to resell on its Consolidated Statement of Assets and Liabilities with a cost basis of $30,000 and a fair value of $13,500 as of September 30, 2025. See Note 2. Summary of Significant Accounting Policies, for details.
[68] The Company holds one security purchased under a collateralized agreement to resell on its Consolidated Statement of Assets and Liabilities with a cost basis of $30,000 and a fair value of $13,500 as of December 31, 2024. See Note 2. Summary of Significant Accounting Policies, for details.
[69] Investment is held by NMF Permian Holdings, LLC.
[70] Investment is held by NMF Permian Holdings, LLC.
[71] The Company holds ordinary shares in Pioneer Topco I, L.P., and two first lien term loans and a first lien revolver in Pioneer Buyer I, LLC, a wholly-owned subsidiary of Pioneer Topco I, L.P.
[72] The Company holds ordinary shares in Pioneer Topco I, L.P., and two first lien term loans and a first lien revolver in Pioneer Buyer I, LLC, a wholly-owned subsidiary of Pioneer Topco I, L.P.
[73] Investment is held by NMF Pioneer, Inc.
[74] Investment is held by NMF Pioneer, Inc.