Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS - Schedule of Changes in Level 3 Fair Value Measurements of Investments (Details)

v3.24.3
INVESTMENTS - Schedule of Changes in Level 3 Fair Value Measurements of Investments (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Mar. 31, 2023
Old World Christmas, Inc.                
New investments, repayments and settlements:                
Realized gain (loss) on preferred equity       $ 300        
Total                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Beginning balance $ 853,307 $ 915,614 $ 853,307 915,614 $ 899,138 $ 920,486 $ 800,047 $ 753,516
New investments, repayments and settlements:                
Issuances / originations 19,500 66,813 20,098 114,788        
Settlements / repayments (25,000) 0 (28,000) 0        
Sales (48,503) 0 (48,503) (1,775)        
Transfers 0 0 0 0        
Ending balance 853,307 915,614 853,307 915,614        
Total | Debt and Equity Securities, Realized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Total gain (loss) 42,284 0 42,284 1,155        
Total | Debt and Equity Securities, Unrealized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Total gain (loss) 3,916 48,754 (15,030) 48,023        
Reversal of previously recorded (appreciation) depreciation upon realization (38,028) 0 (38,028) (93)        
Secured First Lien Debt                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Beginning balance 469,480 508,504 469,480 508,504 463,219 474,856 452,215 437,517
New investments, repayments and settlements:                
Issuances / originations 19,500 55,400 20,098 70,100        
Settlements / repayments 0 0 (3,000) 0        
Sales 0 0 0 0        
Transfers 0 0 0 0        
Ending balance 469,480 508,504 469,480 508,504        
Secured First Lien Debt | Debt and Equity Securities, Realized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Total gain (loss) 0 0 0 0        
Secured First Lien Debt | Debt and Equity Securities, Unrealized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Total gain (loss) (13,239) 889 (22,474) 887        
Reversal of previously recorded (appreciation) depreciation upon realization 0 0 0 0        
Secured Second Lien Debt                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Beginning balance 111,344 102,747 111,344 102,747 137,827 138,703 104,794 75,734
New investments, repayments and settlements:                
Issuances / originations 0 0 0 25,000        
Settlements / repayments (25,000) 0 (25,000) 0        
Sales 0 0 0 0        
Transfers 0 0 0 0        
Ending balance 111,344 102,747 111,344 102,747        
Secured Second Lien Debt | Debt and Equity Securities, Realized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Total gain (loss) 0 0 0 0        
Secured Second Lien Debt | Debt and Equity Securities, Unrealized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Total gain (loss) (1,483) (2,047) (2,359) 2,013        
Reversal of previously recorded (appreciation) depreciation upon realization 0 0 0 0        
Preferred Equity                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Beginning balance 228,528 267,596 228,528 267,596 212,591 213,480 214,258 222,585
New investments, repayments and settlements:                
Issuances / originations 0 11,413 0 14,688        
Settlements / repayments 0 0 0 0        
Sales 0 0 0 (273)        
Transfers 0 0 0 0        
Ending balance 228,528 267,596 228,528 267,596        
Preferred Equity | Debt and Equity Securities, Realized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Total gain (loss) 0 0 0 273        
Preferred Equity | Debt and Equity Securities, Unrealized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Total gain (loss) 15,937 41,925 15,048 30,323        
Reversal of previously recorded (appreciation) depreciation upon realization 0 0 0 0        
Common Equity/ Equivalents                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Beginning balance 43,955 36,767 43,955 36,767 $ 85,501 $ 93,447 $ 28,780 $ 17,680
New investments, repayments and settlements:                
Issuances / originations 0 0 0 5,000        
Settlements / repayments 0 0 0 0        
Sales (48,503) 0 (48,503) (1,502)        
Transfers 0 0 0 0        
Ending balance 43,955 36,767 43,955 36,767        
Common Equity/ Equivalents | Debt and Equity Securities, Realized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Total gain (loss) 42,284 0 42,284 882        
Common Equity/ Equivalents | Debt and Equity Securities, Unrealized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Total gain (loss) 2,701 7,987 (5,245) 14,800        
Reversal of previously recorded (appreciation) depreciation upon realization $ (38,028) $ 0 $ (38,028) $ (93)