Annual report pursuant to Section 13 and 15(d)

Net Income Per Share (Details)

v3.22.0.1
Net Income Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Earnings Per Share [Abstract]      
Net income $ 269,980 $ 176,049 $ 318,728
Basic earnings per share:      
Weighted average number of Sub-share Certificates outstanding - basic (in shares) 7,752,027 7,756,156 7,756,437
Basic earnings per share (in dollars per share) $ 34.83 $ 22.70 $ 41.09
Diluted earnings per share:      
Weighted average number of Sub-share Certificates outstanding - basic (in shares) 7,752,027 7,756,156 7,756,437
Stock-based incentive plan 27 0 0
Weighted average number of Sub-share Certificates outstanding - diluted (in shares) 7,752,054 7,756,156 7,756,437
Diluted earnings per share (in dollars per share) $ 34.83 $ 22.70 $ 41.09