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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($)
$ in Thousands
Total
Adoption of New Accounting Pronouncements
Class A
Class B
Common Stock
Common Stock
Class A
Common Stock
Class B
Treasury Stock
Retained Earnings
Retained Earnings
Adoption of New Accounting Pronouncements
Accumulated Other Comprehensive Income (Loss), Net of Tax
Accumulated Other Comprehensive Income (Loss), Net of Tax
Adoption of New Accounting Pronouncements
Redeemable Noncontrolling Interest in Subsidiaries/ Temporary Equity
Common stock, beginning balance (in shares) at Dec. 31, 2017           9,000 101,100,453            
Treasury stock, beginning balance (in shares) at Dec. 31, 2017               8,405,003          
Beginning balance at Dec. 31, 2017 $ 761,215 $ (129)     $ 343,378     $ (278,732) $ 697,359 $ 125 $ (790) $ (254)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Net Income 220,297               220,297        
Other Comprehensive Income (Loss), net of tax (13,573)                   (13,573)    
Stock Award Activity (in shares)             908,719            
Stock Award Activity (in shares)               (908,719)          
Stock Award Activity 25,318       23,874     $ 20,495 (19,051)        
Dividends Declared (106,907)               (106,907)        
Purchase of treasury stock (in shares)             (1,205,790)            
Purchase of treasury stock (in shares)               1,205,790          
Purchase of Treasury Stock (29,100)             $ (29,100)          
Common stock, ending balance (in shares) at Dec. 31, 2018           9,000 100,803,382            
Treasury stock, ending balance (in shares) at Dec. 31, 2018               8,702,074          
Ending balance at Dec. 31, 2018 857,121       367,252     $ (287,337) 791,823   (14,617)    
Temporary equity, beginning balance at Dec. 31, 2017                         $ 30,163
Increase (Decrease) in Temporary Equity [Roll Forward]                          
Net Income                         2,002
Other Comprehensive Income (Loss), net of tax                         (6,009)
Consolidation/(Deconsolidation)                         2,801
Stock Award Activity                         (1,751)
Stock Award Activity                         4,239
Distributions to Noncontrolling Interest in Subsidiaries                         (18,492)
Business Acquisition                         169,560
Temporary equity, ending balance at Dec. 31, 2018                         182,513
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Net Income 272,339               272,339        
Other Comprehensive Income (Loss), net of tax 14,368                   14,368    
Stock Award Activity (in shares)             941,074            
Stock Award Activity (in shares)               (941,074)          
Stock Award Activity 26,389       24,958     $ 22,045 (20,614)        
Dividends Declared (109,049)               (109,049)        
Change in Estimated Redemption Value of Redeemable Noncontrolling Interests (4,148)               (4,148)        
Purchase of treasury stock (in shares)             (614,077)            
Purchase of treasury stock (in shares)               614,077          
Purchase of Treasury Stock $ (15,740)             $ (15,740)          
Common stock, ending balance (in shares) at Dec. 31, 2019     9,000     9,000 101,130,379            
Treasury stock, ending balance (in shares) at Dec. 31, 2019 8,375,077             8,375,077          
Ending balance at Dec. 31, 2019 $ 1,041,280       392,210     $ (281,032) 930,351   (249)    
Increase (Decrease) in Temporary Equity [Roll Forward]                          
Net Income                         4,786
Other Comprehensive Income (Loss), net of tax                         6,907
Consolidation/(Deconsolidation)                         9,356
Stock Award Activity                         454
Stock Award Activity                         7,888
Distributions to Noncontrolling Interest in Subsidiaries                         (3,580)
Business Acquisition                         (386)
Change in Estimated Redemption Value of Redeemable Noncontrolling Interests                         4,148
Temporary equity, ending balance at Dec. 31, 2019                         212,086
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Net Income 326,364               326,364        
Other Comprehensive Income (Loss), net of tax 15,420                   15,420    
Stock Award Activity (in shares)             1,141,331            
Stock Award Activity (in shares)               (1,141,331)          
Stock Award Activity 28,103       26,648     $ 24,206 (22,751)        
Dividends Declared (207,744)               (207,744)        
Change in Estimated Redemption Value of Redeemable Noncontrolling Interests 1,479               1,479        
Purchase of treasury stock (in shares)             (2,940,267)            
Purchase of treasury stock (in shares)       2,900,000       2,940,267          
Purchase of Treasury Stock $ (67,905)     $ (67,900)       $ (67,905)          
Common stock, ending balance (in shares) at Dec. 31, 2020     9,000     9,000 99,331,443            
Treasury stock, ending balance (in shares) at Dec. 31, 2020 10,174,013             10,174,013          
Ending balance at Dec. 31, 2020 $ 1,136,997       $ 418,858     $ (324,731) $ 1,027,699   $ 15,171    
Increase (Decrease) in Temporary Equity [Roll Forward]                          
Net Income                         9,658
Other Comprehensive Income (Loss), net of tax                         6,593
Consolidation/(Deconsolidation)                         20,985
Stock Award Activity                         (3,424)
Stock Award Activity                         8,786
Distributions to Noncontrolling Interest in Subsidiaries                         (16,218)
Change in Estimated Redemption Value of Redeemable Noncontrolling Interests                         (1,479)
Temporary equity, ending balance at Dec. 31, 2020                         $ 236,987