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Condensed Consolidated Unaudited Statements of Shareholders' Equity - USD ($)
$ in Thousands
Total
Common Stock, Class B Common Stock and Preferred Stock
Paid-In Capital
Accumulated Other Comprehensive Loss
Retained Earnings
Treasury Stock
Non-controlling Interest
Beginning balance at Dec. 31, 2020 $ 1,779,761 $ 21,697 $ 950,915 $ (34,867) $ 636,373 $ (87,440) $ 293,083
Beginning balance (in shares) at Dec. 31, 2020   38,521,694          
Net income 66,127       55,092   11,035
Other comprehensive income 3,776     2,474     1,302
Issuances of non-vested restricted shares of common stock   $ 61 (61)        
Issuances of non-vested restricted shares of common stock (in shares)   121,934          
Forfeitures of non-vested restricted shares of common stock   $ (21) 21        
Forfeitures of non-vested restricted shares of common stock (in shares)   (43,000)          
Common stock contribution to 401(k) plan 5,154 $ 11 5,143        
Common stock contribution to 401(k) plan (in shares)   22,752          
Stock issuances from exercise of stock options and employee stock purchase plan 3,874 $ 12 3,862        
Stock issuances from exercise of stock options and employee stock purchase plan (in shares)   24,735          
Share-based compensation 6,656   6,656        
Cash dividends declared and paid on Common and Class B common stock (68,521)       (68,521)    
Ending balance at Mar. 31, 2021 1,796,827 $ 21,760 966,536 (32,393) 622,944 (87,440) 305,420
Ending balance (in shares) at Mar. 31, 2021   38,648,115          
Beginning balance at Dec. 31, 2021 1,997,415 $ 21,836 1,003,932 (34,176) 760,796 (87,440) 332,467
Beginning balance (in shares) at Dec. 31, 2021   38,799,632          
Net income 134,890       113,298   21,592
Other comprehensive income 4,381     2,935     1,446
Issuances of non-vested restricted shares of common stock   $ 53 (53)        
Issuances of non-vested restricted shares of common stock (in shares)   105,882          
Common stock contribution to 401(k) plan 6,737 $ 11 6,726        
Common stock contribution to 401(k) plan (in shares)   21,532          
Stock issuances from exercise of stock options and employee stock purchase plan 4,420 $ 12 4,408        
Stock issuances from exercise of stock options and employee stock purchase plan (in shares)   24,850          
Share-based compensation 8,667   8,667        
Cash dividends declared and paid on Common and Class B common stock (75,795)       (75,795)    
Ending balance at Mar. 31, 2022 $ 2,080,715 $ 21,912 $ 1,023,680 $ (31,241) $ 798,299 $ (87,440) $ 355,505
Ending balance (in shares) at Mar. 31, 2022   38,951,896