Quarterly report [Sections 13 or 15(d)]

Earnings Per Share - Earnings Per Share, Basic and Diluted (Details)

v3.25.3
Earnings Per Share - Earnings Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2025
Sep. 30, 2024
Earnings Per Share [Abstract]                
Net income $ 121,238 $ 116,140 $ 120,652 $ 106,594 $ 114,589 $ 114,417 $ 358,030 $ 335,600
Basic earnings per share:                
Weighted average shares outstanding for basic earnings per share (in shares) 22,984,883     22,979,781     22,984,317 22,990,213
Basic earnings per share (in dollars per share) $ 5.27     $ 4.64     $ 15.58 $ 14.60
Diluted earnings per share:                
Weighted average shares outstanding for basic earnings per share (in shares) 22,984,883     22,979,781     22,984,317 22,990,213
Effect of dilutive securities:                
Incentive and equity compensation plans (in shares) 25,375     32,388     23,965 26,520
Weighted average shares outstanding for diluted earnings per share (in shares) 23,010,258     23,012,169     23,008,282 23,016,733
Diluted earnings per share (in dollars per share) $ 5.27     $ 4.63     $ 15.56 $ 14.58