v3.26.1
Unaudited Consolidated Statements of Changes in Net Assets - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Investment Company, Net Assets [Roll Forward]          
Beginning balance (in shares)     104,706,884    
Beginning balance $ 1,153,450 $ 1,188,803 $ 1,160,682 $ 1,190,354 $ 1,190,354
Net investment income 28,955 29,810 54,855 56,201  
Net realized gain (loss) on investments / CSAs / foreign currency transactions / forward currency contracts 18,803 (15,157) 8,013 (16,227)  
Net unrealized (depreciation) appreciation on investments / CSAs / foreign currency transactions / forward currency contracts (29,427) 5,906 (24,546) 13,161  
Distributions of net investment income (27,224) (32,630) (54,447) (65,306)  
Deemed contribution - CSA (See Note 2) $ 1,329   $ 1,329    
Purchases of shares in repurchase plan   $ (888)   $ (2,339)  
Ending balance (in shares) 104,706,884 105,158,938 104,706,884 105,158,938 104,706,884
Ending balance $ 1,145,886 $ 1,175,844 $ 1,145,886 $ 1,175,844 $ 1,160,682
Common Stock          
Investment Company, Net Assets [Roll Forward]          
Beginning balance (in shares) 104,706,884 105,258,938 104,706,884 105,408,938 105,408,938
Beginning balance $ 104 $ 105 $ 104 $ 105 $ 105
Purchases of shares in repurchase plan (in shares)   (100,000)   (250,000)  
Ending balance (in shares) 104,706,884 105,158,938 104,706,884 105,158,938 104,706,884
Ending balance $ 104 $ 105 $ 104 $ 105 $ 104
Additional Paid-In Capital          
Investment Company, Net Assets [Roll Forward]          
Beginning balance 1,862,834 1,845,526 1,862,834 1,846,977 1,846,977
Deemed contribution - CSA (See Note 2) 1,329   1,329    
Purchases of shares in repurchase plan   (888)   (2,339)  
Ending balance 1,864,163 1,844,638 1,864,163 1,844,638 1,862,834
Total Distributable Earnings (Loss)          
Investment Company, Net Assets [Roll Forward]          
Beginning balance (709,488) (656,828) (702,256) (656,728) (656,728)
Net investment income 28,955 29,810 54,855 56,201  
Net realized gain (loss) on investments / CSAs / foreign currency transactions / forward currency contracts 18,803 (15,157) 8,013 (16,227)  
Net unrealized (depreciation) appreciation on investments / CSAs / foreign currency transactions / forward currency contracts (29,427) 5,906 (24,546) 13,161  
Distributions of net investment income (27,224) (32,630) (54,447) (65,306)  
Ending balance $ (718,381) $ (668,899) $ (718,381) $ (668,899) $ (702,256)