v3.26.1
EQUITY (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
May 31, 2026
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Class of Stock [Line Items]                
Quarterly dividend on all classes of common stock (in dollars per share)   $ 1.60 $ 1.60 $ 1.50 $ 1.50 $ 1.50 $ 1.50  
Repurchase of Class C Common Stock (in shares)               47,319
Repurchase of Class C Common Stock     $ 7,178          
Remaining authorized amount for repurchase   $ 30,000           $ 30,000
Capital required for capital adequacy   1,100,000   $ 1,000,000       1,100,000
Capital   1,900,000   1,700,000       1,900,000
Excess capital   $ 730,700   $ 677,700       730,700
Class C non-voting common stock                
Class of Stock [Line Items]                
Repurchase of Class C Common Stock               $ 7,100
Series I                
Class of Stock [Line Items]                
Preferred stock, shares issued (in shares) 4,000,000.0 4,000,000   4,000,000       4,000,000
Preferred stock, dividend rate 6.875%              
Preferred stock, par value (in dollars per share) $ 25.00 $ 25   $ 25       $ 25
Payments of stock issuance costs $ 3,200