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Fair Value (Tables)
12 Months Ended
Dec. 31, 2022
Fair Value Disclosures [Abstract]  
Schedule of Portfolio Investments by Level in the Fair Value Hierarchy
The following table summarizes the levels in the fair value hierarchy that the Company’s portfolio investments fall into as of December 31, 2022:
 TotalLevel ILevel IILevel III
First lien$1,753,967 $— $— $1,753,967 
Second lien561,207 — 81,139 480,068 
Subordinated76,659 — 3,817 72,842 
Equity and other829,414 — — 829,414 
Total investments$3,221,247 $— $84,956 $3,136,291 
The following table summarizes the levels in the fair value hierarchy that the Company's portfolio investments fall into as of December 31, 2021:
 TotalLevel ILevel IILevel III
First lien$1,657,815 $— $22,672 $1,635,143 
Second lien627,356 — 308,236 319,120 
Subordinated50,742 — — 50,742 
Equity and other838,451 — — 838,451 
Total investments$3,174,364 $— $330,908 $2,843,456 
Changes in Level III Portfolio Investments
The following table summarizes the changes in fair value of Level III portfolio investments for the year ended December 31, 2022, as well as the portion of appreciation (depreciation) included in income attributable to unrealized appreciation (depreciation) related to those assets and liabilities still held by the Company at December 31, 2022:
 TotalFirst LienSecond LienSubordinatedEquity and
other
Fair value, December 31, 2021$2,843,456 $1,635,143 $319,120 $50,742 $838,451 
Total gains or losses included in earnings:     
Net realized gains on investments52,934 12,351 — — 40,583 
Net change in unrealized (depreciation) appreciation of investments(70,607)(33,350)(42,375)(4,318)9,436 
Purchases, including capitalized PIK and revolver fundings693,202 621,319 9,187 26,418 36,278 
Proceeds from sales and paydowns of investments(604,861)(493,579)(15,948)— (95,334)
Transfers into Level III(1)222,167 12,083 210,084 — — 
Fair value, December 31, 2022$3,136,291 $1,753,967 $480,068 $72,842 $829,414 
Unrealized (depreciation) appreciation for the period relating to those Level III assets that were still held by the Company at the end of the period:$(30,244)$(36,175)$(42,817)$(4,318)$53,066 
(1)As of December 31, 2022, portfolio investments were transferred into Level III from Level II at fair value as of the beginning of the period in which the reclassification occurred.
The following table summarizes the changes in fair value of Level III portfolio investments for the year ended December 31, 2021, as well as the portion of appreciation (depreciation) included in income attributable to unrealized appreciation (depreciation) related to those assets and liabilities still held by the Company at December 31, 2021:
 TotalFirst LienSecond LienSubordinatedEquity and
other
Fair value, December 31, 2020$2,737,857 $1,483,367 $570,033 $36,939 $647,518 
Total gains or losses included in earnings:     
Net realized (losses) gains on investments(6,785)(10,329)349 (5,150)8,345 
Net change in unrealized appreciation (depreciation) of investments101,260 5,552 (7,889)5,688 97,909 
Purchases, including capitalized PIK and revolver fundings(1)1,134,829 821,224 101,881 13,265 198,459 
Proceeds from sales and paydowns of investments(1)(987,561)(664,671)(209,110)— (113,780)
Transfers out of Level III(2)(136,144)— (136,144)— — 
Fair value, December 31, 2021$2,843,456 $1,635,143 $319,120 $50,742 $838,451 
Unrealized appreciation (depreciation) for the period relating to those Level III assets that were still held by the Company at the end of the period:$94,448 $5,392 $(7,897)$538 $96,415 
(1)Includes non-cash reorganizations and restructurings.
(2)As of December 31, 2021, portfolio investments were transferred out of Level III into Level II at fair value as of the beginning of the period in which the reclassification occurred.
Schedule of Fair Value Measurement Inputs and Valuation Techniques
The unobservable inputs used in the fair value measurement of the Company's Level III investments as of December 31, 2022 were as follows:
   Range
TypeFair Value as of December 31, 2022ApproachUnobservable InputLow High Weighted
Average (1)
First lien$1,663,116 Market & income approachEBITDA multiple4.8x38.0x 15.3x
Revenue multiple5.0x19.5x 9.5x
 Discount rate8.3 %29.4 %11.1 %
90,851 OtherN/A(2)N/AN/AN/A
Second lien471,350 Market & income approachEBITDA multiple8.2x32.0x15.2x
 Discount rate11.2 %47.1 %13.7 %
8,718 OtherN/A(2)N/AN/AN/A
Subordinated72,842 Market & income approachEBITDA multiple8.0x23.5x16.3x
 Discount rate13.5 %29.7 %17.0 %
Equity and other793,468 Market & income approachEBITDA multiple4.8x26.5x13.0x
Revenue multiple10.5x19.5x 14.6x
 Discount rate6.4 %44.0 %13.0 %
35,946 OtherN/A(2)N/AN/AN/A
$3,136,291        
(1)Unobservable inputs were weighted by the relative fair value of the investments.
(2)Fair value was determined based on transaction pricing or recent acquisition or sale as the best measure of fair value with no material changes in operations of the related portfolio company since the transaction date.
The unobservable inputs used in the fair value measurement of the Company's Level III investments as of December 31, 2021 were as follows:
   Range
TypeFair Value as of December 31, 2021ApproachUnobservable InputLowHighWeighted
Average (1)
First lien$1,478,445 Market & income approachEBITDA multiple4.5x32.5x14.7x
Revenue multiple4.0x19.5x7.0x
Discount rate4.8 %17.0 %7.6 %
55,326 Market quoteBroker quoteN/AN/AN/A
101,372 OtherN/A(2)N/AN/AN/A
Second lien253,587 Market & income approachEBITDA multiple7.5x32.0x15.2x
Discount rate7.5 %28.2 %11.3 %
22,528 Market quoteBroker quoteN/AN/AN/A
43,005 OtherN/A(2)N/AN/AN/A
Subordinated39,798 Market & income approachEBITDA multiple8.0x14.5x11.5x
Discount rate11.1 %18.4 %16.0 %
10,944OtherN/A(2)N/AN/AN/A
Equity and other824,151Market & income approachEBITDA multiple5.0x26.5x12.7x
Revenue multiple5.0x19.5x14.3x
Discount rate4.0 %31.3 %10.0 %
14,300 OtherN/A(2)N/AN/AN/A
$2,843,456 
(1)Unobservable inputs were weighted by the relative fair value of the investments.
(2)Fair value was determined based on transaction pricing or recent acquisition or sale as the best measure of fair value with no material changes in operations of the related portfolio company since the transaction date.
Schedule of Carrying and Fair Values of Borrowings
The following are the principal amounts and fair values of the Company’s borrowings as of December 31, 2022. Fair value is estimated by discounting remaining payments using applicable current market rates, which take into account changes in the Company’s marketplace credit ratings or market quotes, if available.
As of
 December 31, 2022
Principal Amount
Fair Value
Holdings Credit Facility$618,963 $604,971 
Unsecured Notes531,500 499,551 
SBA-guaranteed debentures300,000 250,442 
Convertible Notes316,816 317,071 
DB Credit Facility186,400 183,734 
NMFC Credit Facility (1)40,359 39,699 
NMNLC Credit Facility II3,785 3,775 
Total Borrowings$1,997,823 $1,899,243 
 
(1)     As of December 31, 2022, the principal amount of the NMFC Credit Facility was $40,359, which included £22,850 denominated in GBP and €700 denominated in EUR that has been converted to U.S. dollars. As of December 31, 2022, the fair value of the NMFC Credit Facility was $39,699, which included £22,476 denominated in GBP and €689 denominated in EUR that has been converted to U.S. dollars.