v3.26.1
Share Capital and Capital In Excess of Par Value (Details) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Changes in share capital and capital in excess of par value    
Balance at the beginning of the period $ 940,568  
Balance at the beginning of the period (in shares) 108  
Purchase and retirement of common shares   $ (6,483)
Purchase and retirement of common shares (in shares) 0 (209)
Balance at the end of the period $ 948,795 $ 879,001
Balance at the end of the period (in shares) 111 108
Stock dividends (as a percent) 3.00% 3.00%
Treasury Stock    
Changes in share capital and capital in excess of par value    
Balance at the beginning of the period $ (1,991) $ (1,992)
Balance at the beginning of the period (in shares) 108 105
Issuance of 3% stock dividend (in shares) 3 3
Balance at the end of the period $ (1,991) $ (1,992)
Balance at the end of the period (in shares) 111 108
Capital in Excess of Par Value    
Changes in share capital and capital in excess of par value    
Balance at the beginning of the period $ 847,308 $ 788,894
Issuance of 3% stock dividend 71,486 64,816
Purchase and retirement of common shares   (6,402)
Balance at the end of the period 918,794 847,308
Common Stock | Common Stock    
Changes in share capital and capital in excess of par value    
Balance at the beginning of the period $ 29,042 $ 28,325
Balance at the beginning of the period (in shares) 41,821 40,789
Issuance of 3% stock dividend $ 868 $ 842
Issuance of 3% stock dividend (in shares) 1,250 1,213
Conversion of Class B common shares to common shares $ 1 $ 2
Conversion of Class B common shares to common shares (in shares) 2 3
Purchase and retirement of common shares   $ (144)
Purchase and retirement of common shares (in shares)   (209)
Balance at the end of the period $ 29,911 $ 29,025
Balance at the end of the period (in shares) 43,073 41,796
Class B Common Stock | Common Stock    
Changes in share capital and capital in excess of par value    
Balance at the beginning of the period $ 21,643 $ 21,032
Balance at the beginning of the period (in shares) 31,166 30,286
Issuance of 3% stock dividend $ 648 $ 630
Issuance of 3% stock dividend (in shares) 934 908
Conversion of Class B common shares to common shares $ (1) $ (2)
Conversion of Class B common shares to common shares (in shares) (2) (3)
Balance at the end of the period $ 22,290 $ 21,660
Balance at the end of the period (in shares) 32,098 31,191