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Investments - Summary of Investments at Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Summary Of Investment Holdings [Line Items]    
Cost $ 1,603,099 [1],[2],[3] $ 1,623,906 [4],[5],[6]
Fair Value 1,580,678 [1],[2],[3] 1,598,857 [4],[5],[6]
Unrealized Appreciation/ (Depreciation) (22,421) (25,049)
Senior Secured First Lien    
Summary Of Investment Holdings [Line Items]    
Cost 366,096 395,736
Fair Value 352,812 379,627
Unrealized Appreciation/ (Depreciation) (13,284) (16,109)
Unitranche First Lien    
Summary Of Investment Holdings [Line Items]    
Cost 1,061,079 1,055,506
Fair Value 1,039,804 1,044,141
Unrealized Appreciation/ (Depreciation) (21,275) (11,365)
Unitranche First Lien Last Out    
Summary Of Investment Holdings [Line Items]    
Cost 25,398 14,888
Fair Value 26,170 14,741
Unrealized Appreciation/ (Depreciation) 772 (147)
Senior Secured Second Lien    
Summary Of Investment Holdings [Line Items]    
Cost 22,644 44,571
Fair Value 18,647 38,537
Unrealized Appreciation/ (Depreciation) (3,997) (6,034)
Unsecured Debt One    
Summary Of Investment Holdings [Line Items]    
Cost 18,707 16,690
Fair Value 19,531 17,525
Unrealized Appreciation/ (Depreciation) 824 835
Equity & Other    
Summary Of Investment Holdings [Line Items]    
Cost 63,830 48,421
Fair Value 84,734 64,860
Unrealized Appreciation/ (Depreciation) 20,904 16,439
LLC/LP Equity Interests    
Summary Of Investment Holdings [Line Items]    
Cost 45,345 48,094
Fair Value 38,980 39,426
Unrealized Appreciation/ (Depreciation) $ (6,365) $ (8,668)
[1] All debt investments are income-producing, unless otherwise noted. Equity and member interests are non-income-producing unless otherwise noted. The Company generally acquires its investments in private transactions exempt from registration under the Securities Act. Its investments are therefore generally subject to certain limitations on resale, and may be deemed to be “restricted securities” under the Securities Act.
[2] All positions held are non-controlled/non-affiliated investments, unless otherwise noted, as defined by the 1940 Act. Non-controlled/non-affiliated investments are investments that are neither controlled nor affiliated.
[3] The fair value of the investment was determined using significant unobservable inputs unless otherwise noted, as defined by the 1940 Act. See Note 2 “Summary of Significant Accounting Policies”.
[4] All debt investments are income-producing, unless otherwise noted. Equity and member interests are non-income-producing unless otherwise noted. The Company generally acquires its investments in private transactions exempt from registration under the Securities Act. Its investments are therefore generally subject to certain limitations on resale, and may be deemed to be “restricted securities” under the Securities Act.
[5] All positions held are non-controlled/non-affiliated investments, unless otherwise noted, as defined by the 1940 Act. Non-controlled/non-affiliated investments are investments that are neither controlled nor affiliated.
[6] The fair value of the investment was determined using significant unobservable inputs unless otherwise noted, as defined by the 1940 Act. See Note 2 “Summary of Significant Accounting Policies”.