v3.25.2
Consolidated Statements of Changes in Net Assets - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Balance as of beginning of period (in shares)   88,398,713     88,398,713  
Balance as of beginning of period $ 2,840,133 $ 2,797,838 $ 2,515,970 $ 2,477,399 $ 2,797,838 $ 2,477,399
Public offering of common stock, net of offering costs 10,833 5,198 42,217 5,696    
Share‑based compensation 5,416 4,842 4,883 4,103    
Purchase of vested stock for employee payroll tax withholding (10,015)   (7,322) (14)    
Dividend reinvestment (in shares)         324,454 366,496
Dividend reinvestment 9,379 9,087 8,788 8,441 $ 18,466 $ 17,229
Amortization of directors’ deferred compensation 97 108 106 102    
Issuance of restricted stock, net of forfeited shares 0   0      
Net increase in net assets resulting from operations 122,534 116,082 102,688 107,147 $ 238,616 209,835
Dividends to stockholders $ (94,160) (93,022) (88,374) (86,904)    
Balance as of ending of period (in shares) 89,275,113       89,275,113  
Balance as of ending of period $ 2,884,217 $ 2,840,133 $ 2,578,956 $ 2,515,970 $ 2,884,217 $ 2,578,956
Common Stock            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Balance as of beginning of period (in shares) 88,659,597 88,400,391 85,163,633 84,833,002 88,400,391 84,833,002
Balance as of beginning of period $ 887 $ 884 $ 851 $ 848 $ 884 $ 848
Public offering of common stock, net of offering costs (in shares) 195,454 89,091 874,309 128,942    
Public offering of common stock, net of offering costs $ 2 $ 1 $ 9 $ 1    
Purchase of vested stock for employee payroll tax withholding (in shares) (177,024)   (154,751) (295)    
Purchase of vested stock for employee payroll tax withholding $ (2)   $ (2)      
Dividend reinvestment (in shares) 167,705 156,749 179,511 186,985    
Dividend reinvestment $ 2 $ 2 $ 2 $ 2    
Issuance of restricted stock, net of forfeited shares (in shares) 436,863 13,366 489,804 14,999    
Issuance of restricted stock, net of forfeited shares $ 4   $ 5      
Balance as of ending of period (in shares) 89,282,595 88,659,597 86,552,506 85,163,633 89,282,595 86,552,506
Balance as of ending of period $ 893 $ 887 $ 865 $ 851 $ 893 $ 865
Additional Paid-In Capital            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Balance as of beginning of period 2,413,914 2,394,492 2,289,042 2,270,549 2,394,492 2,270,549
Public offering of common stock, net of offering costs 10,831 5,197 42,208 5,695    
Share‑based compensation 5,416 4,842 4,883 4,103    
Purchase of vested stock for employee payroll tax withholding (10,013)   (7,320) (14)    
Dividend reinvestment 9,377 9,085 8,786 8,439    
Amortization of directors’ deferred compensation 97 108 106 102    
Issuance of restricted stock, net of forfeited shares (4)   (5)      
Dividends to stockholders 199 190 179 168    
Balance as of ending of period 2,429,817 2,413,914 2,337,879 2,289,042 2,429,817 2,337,879
Total Undistributed (Overdistributed) Earnings            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Balance as of beginning of period 425,332 402,462 226,077 206,002 402,462 206,002
Net increase in net assets resulting from operations 122,534 116,082 102,688 107,147    
Dividends to stockholders (94,359) (93,212) (88,553) (87,072)    
Balance as of ending of period $ 453,507 $ 425,332 $ 240,212 $ 226,077 $ 453,507 $ 240,212