v3.25.2
Fair Value Measurements - Reconciliation of Beginning and Ending Balances for Investments at Fair Value that Use Level 3 Inputs (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
investment
Jun. 30, 2024
USD ($)
investment
Jun. 30, 2025
USD ($)
investment
Jun. 30, 2024
USD ($)
investment
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Balance at the beginning $ 398,654 $ 466,879 $ 424,257 $ 455,007
Purchases of investments and other adjustments to cost 5,322 24,115 24,365 50,823
Proceeds from principal payments and sales of investments (63,026) (35,330) (105,244) (47,417)
Reclassifications 0 0 0 0
Transfers in (out) of Level 3       (335)
Balance at the end $ 337,543 $ 452,490 $ 337,543 $ 452,490
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized gain (loss) of investments Unrealized gain (loss) of investments Unrealized gain (loss) of investments Unrealized gain (loss) of investments
Total net change in unrealized gain (loss) on investments attributable to Level 3 investments still held $ (3,401) $ (2,996) $ (5,366) $ (5,499)
Number of investments transferred from level 3 | investment 0 0 0 1
Senior secured loans        
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Balance at the beginning $ 330,893 $ 404,051 $ 357,994 $ 388,882
Purchases of investments and other adjustments to cost 4,716 22,437 19,980 46,013
Proceeds from principal payments and sales of investments (62,754) (33,067) (103,296) (37,105)
Reclassifications (906) (3,844) (906) (6,556)
Transfers in (out) of Level 3       0
Balance at the end 270,096 389,942 270,096 389,942
Unitranche secured loans        
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Balance at the beginning 2,183 6,091 3,862 13,877
Purchases of investments and other adjustments to cost 2 22 6 122
Proceeds from principal payments and sales of investments 0 (2,252) (1,676) (10,037)
Reclassifications 0 0 0 0
Transfers in (out) of Level 3       0
Balance at the end 2,183 3,860 2,183 3,860
Junior secured loans        
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Balance at the beginning 32,017 27,427 29,634 26,594
Purchases of investments and other adjustments to cost 523 1,553 3,030 2,640
Proceeds from principal payments and sales of investments 0 (5) 0 (265)
Reclassifications 906 2,304 906 897
Transfers in (out) of Level 3       0
Balance at the end 31,678 28,688 31,678 28,688
Equity investments        
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Balance at the beginning 33,561 29,310 32,767 25,654
Purchases of investments and other adjustments to cost 81 103 1,349 2,048
Proceeds from principal payments and sales of investments (272) (6) (272) (10)
Reclassifications 0 1,540 0 5,659
Transfers in (out) of Level 3       (335)
Balance at the end $ 33,586 $ 30,000 $ 33,586 $ 30,000
Net realized gain (loss) on investments        
Fair Value Measurements        
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Non-controlled/non-affiliate company investments Non-controlled/non-affiliate company investments Non-controlled/non-affiliate company investments Non-controlled/non-affiliate company investments
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Gains (losses) included in earnings $ 77 $ 50 $ 29 $ 54
Net realized gain (loss) on investments | Senior secured loans        
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Gains (losses) included in earnings 0 50 0 50
Net realized gain (loss) on investments | Unitranche secured loans        
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Gains (losses) included in earnings 0 0 0 0
Net realized gain (loss) on investments | Junior secured loans        
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Gains (losses) included in earnings 0 0 0 0
Net realized gain (loss) on investments | Equity investments        
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Gains (losses) included in earnings $ 77 0 $ 29 4
Net change in unrealized gain (loss) on investments        
Fair Value Measurements        
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized gain (loss) of investments   Unrealized gain (loss) of investments  
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Gains (losses) included in earnings $ (3,484) (3,224) $ (5,864) (5,642)
Net change in unrealized gain (loss) on investments | Senior secured loans        
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Gains (losses) included in earnings (1,853) 315 (3,676) (1,342)
Net change in unrealized gain (loss) on investments | Unitranche secured loans        
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Gains (losses) included in earnings (2) (1) (9) (102)
Net change in unrealized gain (loss) on investments | Junior secured loans        
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Gains (losses) included in earnings (1,768) (2,591) (1,892) (1,178)
Net change in unrealized gain (loss) on investments | Equity investments        
Reconciliation of beginning and ending balances for investments at fair value that use Level 3 inputs        
Gains (losses) included in earnings $ 139 $ (947) $ (287) $ (3,020)