v3.26.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Earnings Per Common Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Basic EPS    
Net income attributable to common stockholders $ 51,832 $ 43,985
Net income attributable to common stockholders (in shares) 10,844,000 10,896,000
Net income attributable to common stockholders (in dollars per share) $ 4.78 $ 4.04
Effect of dilutive securities    
SARs and restricted stock units (in shares) 78,000 87,000
SARs and restricted stock units (in dollars per share) $ (0.03) $ (0.03)
Net income, diluted EPS $ 51,832 $ 43,985
Weighted-average shares, diluted EPS (in shares) 10,922,000 10,983,000
Diluted EPS (in dollars per share) $ 4.75 $ 4.01
Stock Appreciation Rights and Restricted Stock    
Effect of dilutive securities    
Antidilutive securities excluded from earnings per share (in shares) 40,723 58,539
Performance Shares    
Effect of dilutive securities    
Antidilutive securities excluded from earnings per share (in shares) 10,962 29,507