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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Cumulative Effect, Period Of Adoption, Adjustment
Preferred stock
Common stock
Common Class A
Common stock
Common Class B
Additional paid-in capital
 Retained earnings
 Retained earnings
Cumulative Effect, Period Of Adoption, Adjustment
Accumulated other comprehensive earnings, net
Noncontrolling interests
Beginning balance (in shares) at Dec. 31, 2019     0 28,458,495 11,271,609          
Beginning balance at Dec. 31, 2019 $ 2,391,094 $ (18,867) $ 0 $ 285 $ 113 $ 5,715 $ 2,377,627 $ (18,867) $ 2,972 $ 4,382
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Issuance of noncontrolling interests 66                 66
Net income (loss) 118,020           117,452     568
Other comprehensive income (loss) 1,312               1,312  
Distribution to noncontrolling interests (920)                 (920)
Cash dividend on Class A and Class B common stock (23,343)           (23,343)      
Issuance of common stock, net of forfeitures (in shares)       196,407            
Issuance of common stock, net of forfeitures 5,155     $ 2   5,153        
Compensation expense for stock based awards 5,459         5,459        
Repurchase of common stock (in shares)       (1,591,314)            
Repurchase of common stock (73,145)     $ (16)   (14,623) (58,506)      
Conversion of common stock (in shares)       100,000 (100,000)          
Conversion of common stock 0     $ 1 $ (1)          
Acquisition of noncontrolling interest (2,000)           (1,250)     (750)
Ending balance (in shares) at Sep. 30, 2020     0 27,163,588 11,171,609          
Ending balance at Sep. 30, 2020 2,402,831   $ 0 $ 272 $ 112 1,704 2,393,113   4,284 3,346
Beginning balance (in shares) at Jun. 30, 2020     0 27,232,836 11,171,609          
Beginning balance at Jun. 30, 2020 2,340,786   $ 0 $ 272 $ 112 1,867 2,331,312   3,233 3,990
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Issuance of noncontrolling interests 14                 14
Net income (loss) 71,176           71,503     (327)
Other comprehensive income (loss) 1,051               1,051  
Distribution to noncontrolling interests (331)                 (331)
Cash dividend on Class A and Class B common stock (7,664)           (7,664)      
Issuance of common stock, net of forfeitures (in shares)       24,132            
Issuance of common stock, net of forfeitures 553         553        
Compensation expense for stock based awards 1,864         1,864        
Repurchase of common stock (in shares)       (93,380)            
Repurchase of common stock (4,618)     $ 0   (2,580) (2,038)      
Ending balance (in shares) at Sep. 30, 2020     0 27,163,588 11,171,609          
Ending balance at Sep. 30, 2020 2,402,831   $ 0 $ 272 $ 112 1,704 2,393,113   4,284 3,346
Beginning balance (in shares) at Dec. 31, 2020     0 27,193,154 11,155,571          
Beginning balance at Dec. 31, 2020 2,628,349   $ 0 $ 272 $ 112 3,794 2,621,762   6,102 (3,693)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Issuance of noncontrolling interests 11,823                 11,823
Net income (loss) 257,136           260,603     (3,467)
Other comprehensive income (loss) 7,377               7,377  
Distribution to noncontrolling interests (6,954)                 (6,954)
Cash dividend on Class A and Class B common stock (25,319)           (25,319)      
Issuance of common stock, net of forfeitures (in shares)       261,760            
Issuance of common stock, net of forfeitures 4,409     $ 3   4,406        
Compensation expense for stock based awards 7,628         7,628        
Repurchase of common stock (in shares)       (372,661)            
Repurchase of common stock (27,486)     $ (4)   (14,235) (13,247)      
Conversion of common stock (in shares)       474,117 (474,117)          
Conversion of common stock 0     $ 5 $ (5)          
Ending balance (in shares) at Sep. 30, 2021     0 27,556,370 10,681,454          
Ending balance at Sep. 30, 2021 2,856,963   $ 0 $ 276 $ 107 1,593 2,843,799   13,479 (2,291)
Beginning balance (in shares) at Jun. 30, 2021     0 27,494,942 11,054,171          
Beginning balance at Jun. 30, 2021 2,828,618   $ 0 $ 275 $ 111 10,158 2,812,315   10,941 (5,182)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Issuance of noncontrolling interests 4,935                 4,935
Net income (loss) 51,219           53,138     (1,919)
Other comprehensive income (loss) 2,538               2,538  
Distribution to noncontrolling interests (125)                 (125)
Cash dividend on Class A and Class B common stock (8,407)           (8,407)      
Issuance of common stock, net of forfeitures (in shares)       29,805            
Issuance of common stock, net of forfeitures 493         493        
Compensation expense for stock based awards 2,770         2,770        
Repurchase of common stock (in shares)       (341,094)            
Repurchase of common stock (25,078)     $ (3)   (11,828) (13,247)      
Conversion of common stock (in shares)       372,717 (372,717)          
Conversion of common stock 0     $ 4 $ (4)          
Ending balance (in shares) at Sep. 30, 2021     0 27,556,370 10,681,454          
Ending balance at Sep. 30, 2021 $ 2,856,963   $ 0 $ 276 $ 107 $ 1,593 $ 2,843,799   $ 13,479 $ (2,291)