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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, 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 (loss) 4,381     2,935     1,446
Issuances of restricted shares of common stock   $ 53 (53)        
Issuances of 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          
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 360,396            
Other comprehensive income (loss) (5,000)            
Ending balance at Jun. 30, 2022 2,219,775 $ 21,925 1,032,291 (37,506) 905,167 (87,440) 385,338
Ending balance (in shares) at Jun. 30, 2022   38,976,859          
Beginning balance at Mar. 31, 2022 2,080,715 $ 21,912 1,023,680 (31,241) 798,299 (87,440) 355,505
Beginning balance (in shares) at Mar. 31, 2022   38,951,896          
Net income 225,506       192,557   32,949
Other comprehensive income (loss) (9,381)     (6,265)     (3,116)
Issuances of restricted shares of common stock   $ 11 (11)        
Issuances of restricted shares of common stock (in shares)   21,177          
Forfeitures of restricted shares of common stock   $ (5) 5        
Forfeitures of restricted shares of common stock (in shares)   (10,000)          
Common stock contribution to 401(k) plan 9 $ 0 9        
Common stock contribution to 401(k) plan (in shares)   28          
Stock issuances from exercise of stock options and employee stock purchase plan 3,807 $ 11 3,796        
Stock issuances from exercise of stock options and employee stock purchase plan (in shares)   21,939          
Retirement of common stock (2,179) $ (4) (2,175)        
Retirement of common stock (in shares)   (8,181)          
Share-based compensation 6,987   6,987        
Cash dividends declared and paid on Common and Class B common stock (85,689)       (85,689)    
Ending balance at Jun. 30, 2022 2,219,775 $ 21,925 1,032,291 (37,506) 905,167 (87,440) 385,338
Ending balance (in shares) at Jun. 30, 2022   38,976,859          
Beginning balance at Dec. 31, 2022 2,248,278 $ 21,811 973,060 (47,710) 1,029,516 (87,440) 359,041
Beginning balance (in shares) at Dec. 31, 2022   38,749,887          
Net income 130,371       110,073   20,298
Other comprehensive income (loss) 260     170     90
Issuances of restricted shares of common stock   $ 58 (58)        
Issuances of restricted shares of common stock (in shares)   116,510          
Forfeitures of restricted shares of common stock   $ (1) 1        
Forfeitures of restricted shares of common stock (in shares)   (2,000)          
Common stock contribution to 401(k) plan 8,862 $ 18 8,844        
Common stock contribution to 401(k) plan (in shares)   35,533          
Stock issuances from exercise of stock options and employee stock purchase plan 12,985 $ 38 12,947        
Stock issuances from exercise of stock options and employee stock purchase plan (in shares)   75,186          
Issuance of Class B common stock (in shares)   632          
Issuance of Class B common stock 200 $ 0 200        
Retirement of common stock (6,452) $ (11) (6,441)        
Retirement of common stock (in shares)   (21,702)          
Share-based compensation 8,763   8,763        
Cash dividends declared and paid on Common and Class B common stock (94,970)       (94,970)    
Ending balance at Mar. 31, 2023 2,308,297 $ 21,913 997,316 (47,540) 1,044,619 (87,440) 379,429
Ending balance (in shares) at Mar. 31, 2023   38,954,046          
Beginning balance at Dec. 31, 2022 2,248,278 $ 21,811 973,060 (47,710) 1,029,516 (87,440) 359,041
Beginning balance (in shares) at Dec. 31, 2022   38,749,887          
Net income 335,774            
Other comprehensive income (loss) 7,375            
Ending balance at Jun. 30, 2023 2,452,050 $ 21,946 1,023,147 (42,760) 1,121,944 (86,630) 414,403
Ending balance (in shares) at Jun. 30, 2023   39,065,636          
Beginning balance at Mar. 31, 2023 2,308,297 $ 21,913 997,316 (47,540) 1,044,619 (87,440) 379,429
Beginning balance (in shares) at Mar. 31, 2023   38,954,046          
Net income 205,403       172,764   32,639
Other comprehensive income (loss) 7,115     4,780     2,335
Issuances of restricted shares of common stock   $ 19 (19)        
Issuances of restricted shares of common stock (in shares)   38,000          
Forfeitures of restricted shares of common stock   $ 0 0        
Forfeitures of restricted shares of common stock (in shares)   (467)          
Stock issuances from exercise of stock options and employee stock purchase plan 5,637 $ 15 5,622        
Stock issuances from exercise of stock options and employee stock purchase plan (in shares)   30,794          
Retirement of common stock (595) $ (1) (594)        
Retirement of common stock (in shares)   (1,737)          
Share-based compensation 6,828   6,828        
Net proceeds from the sale of Common stock 14,804   13,994     810  
Net proceeds from the sale of Common stock (in shares)   45,000          
Cash dividends declared and paid on Common and Class B common stock (95,439)       (95,439)    
Ending balance at Jun. 30, 2023 $ 2,452,050 $ 21,946 $ 1,023,147 $ (42,760) $ 1,121,944 $ (86,630) $ 414,403
Ending balance (in shares) at Jun. 30, 2023   39,065,636