v3.26.1
FAIR VALUE MEASUREMENTS - Level 3 Reconciliation (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Fair value measurements        
Fair value, beginning of period $ 521,787 $ 628,700 $ 557,047 $ 619,472
Funding of investments 32,049 43,247 60,172 90,469
Non-cash interest income 527 653 1,146 1,344
Accretion of discount 430 982 1,173 1,922
Proceeds from paydowns and sales (13,000) (63,063) (71,894) (100,536)
Realized gains (losses) $ 1 $ (21,276) $ (4,335) $ (21,671)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Gain (Loss) on Sale of Investments Gain (Loss) on Sale of Investments Gain (Loss) on Sale of Investments Gain (Loss) on Sale of Investments
Net unrealized appreciation (depreciation) $ 5,047 $ 18,324 $ 3,532 $ 16,567
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Debt and Equity Securities, Unrealized Gain (Loss) Debt and Equity Securities, Unrealized Gain (Loss) Debt and Equity Securities, Unrealized Gain (Loss) Debt and Equity Securities, Unrealized Gain (Loss)
Fair value, end of period $ 546,841 $ 607,567 $ 546,841 $ 607,567
Change in unrealized appreciation (depreciation) on investments still held 4,728 (2,317) 612 (3,497)
First lien secured loans        
Fair value measurements        
Fair value, beginning of period 394,911 516,563 429,573 502,693
Funding of investments 30,079 43,247 58,188 90,469
Non-cash interest income 468 589 1,031 1,153
Accretion of discount 424 980 1,160 1,872
Proceeds from paydowns and sales (13,000) (62,967) (71,894) (95,440)
Conversions   (7,109)   (7,109)
Realized gains (losses) 1 (21,276) (4,335) (21,671)
Net unrealized appreciation (depreciation) 818 18,052 (22) 16,112
Fair value, end of period 413,701 488,079 413,701 488,079
Change in unrealized appreciation (depreciation) on investments still held 493 (2,582) (2,947) (3,992)
Second lien secured loans        
Fair value measurements        
Fair value, beginning of period 4,944 3,442 4,839 8,342
Non-cash interest income 29 37 56 137
Accretion of discount 5 1 11 48
Proceeds from paydowns and sales   (96)   (5,096)
Net unrealized appreciation (depreciation) (1)   71 (47)
Fair value, end of period 4,977 3,384 4,977 3,384
Change in unrealized appreciation (depreciation) on investments still held     72  
Unsecured Loans        
Fair value measurements        
Fair value, beginning of period 1,315 1,202 1,286 1,175
Non-cash interest income 30 27 59 54
Accretion of discount 1 1 2 2
Net unrealized appreciation (depreciation) (1)   (2) (1)
Fair value, end of period 1,345 1,230 1,345 1,230
Change in unrealized appreciation (depreciation) on investments still held (2) (1) (3) (2)
Subordinated Note to STRS JV        
Fair value measurements        
Fair value, beginning of period 84,416 84,416 84,416 84,416
Funding of investments 1,840   1,840  
Fair value, end of period 86,256 84,416 86,256 84,416
Equity (excluding STRS JV)        
Fair value measurements        
Fair value, beginning of period 36,201 23,077 36,933 22,846
Funding of investments 130   144  
Conversions   7,109   7,109
Net unrealized appreciation (depreciation) 4,231 272 3,485 503
Fair value, end of period 40,562 30,458 40,562 30,458
Change in unrealized appreciation (depreciation) on investments still held $ 4,237 $ 266 $ 3,490 $ 497