Quarterly report [Sections 13 or 15(d)]

Net Income Per Share - Calculation (Details)

v3.25.2
Net Income Per Share - Calculation (Details) - USD ($)
$ / shares in Units, $ 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
Net income $ 151,602 $ 123,385 $ 150,723 $ 152,381 $ 274,986 $ 303,104
Weighted average number of common shares outstanding - basic 28,371,644   31,324,833   28,698,125 31,483,144
Dilutive effect of common stock equivalents:            
Stock options 80,736   91,516   81,927 93,332
Weighted average number of common shares outstanding - diluted 28,515,554   31,524,063   28,858,719 31,693,524
Basic net income per common share $ 5.34   $ 4.81   $ 9.58 $ 9.63
Diluted net income per common share $ 5.32   $ 4.78   $ 9.53 $ 9.56
Service-based conditions            
Dilutive effect of common stock equivalents:            
Restricted stock awards 12,893   34,973   21,949 38,083
Market-based conditions            
Dilutive effect of common stock equivalents:            
Restricted stock awards 32,363   61,856   31,218 61,491
Performance-based conditions            
Dilutive effect of common stock equivalents:            
Restricted stock awards 17,918   10,885   25,500 17,474