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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, 2018 $ 1,601,713 $ 21,167 $ 832,121 $ (45,968) $ 627,969 $ (87,440) $ 253,864
Beginning balance (in shares) at Dec. 31, 2018   37,461,643          
Net income 43,804       35,037   8,767
Other comprehensive income (loss) 4,195     2,783     1,412
Issuances of non-vested restricted shares of common stock   $ 39 (39)        
Issuances of non-vested restricted shares of common stock (in shares)   77,049          
Forfeitures of non-vested restricted shares of common stock   $ (3) 3        
Forfeitures of non-vested restricted shares of common stock (in shares)   (5,000)          
Common stock contribution to 401(k) plan 4,274 $ 15 4,259        
Common stock contribution to 401(k) plan (in shares)   30,715          
Stock issuances from exercise of stock options and employee stock purchase plan 1,125 $ 4 1,121        
Stock issuances from exercise of stock options and employee stock purchase plan (in shares)   8,925          
Retirement of common stock (428) $ (1) (427)        
Retirement of common stock (in shares)   (2,985)          
Share-based compensation 4,537   4,537        
Cash dividends declared and paid on Common and Class B common stock (59,965)       (59,965)    
Ending balance at Mar. 31, 2019 1,599,255 $ 21,221 841,575 (43,185) 603,041 (87,440) 264,043
Ending balance (in shares) at Mar. 31, 2019   37,570,347          
Beginning balance at Dec. 31, 2019 1,714,767 $ 21,533 907,877 (39,050) 632,507 (87,440) 279,340
Beginning balance (in shares) at Dec. 31, 2019   38,194,056          
Net income 36,247       30,502   5,745
Other comprehensive income (loss) (19,280)     (12,739)     (6,541)
Issuances of non-vested restricted shares of common stock   $ 57 (57)        
Issuances of non-vested restricted shares of common stock (in shares)   113,765          
Common stock contribution to 401(k) plan 4,543 $ 13 4,530        
Common stock contribution to 401(k) plan (in shares)   25,216          
Stock issuances from exercise of stock options and employee stock purchase plan 2,541 $ 9 2,532        
Stock issuances from exercise of stock options and employee stock purchase plan (in shares)   18,674          
Retirement of common stock (791) $ (2) (789)        
Retirement of common stock (in shares)   (4,828)          
Share-based compensation 6,097   6,097        
Cash dividends declared and paid on Common and Class B common stock (61,238)       (61,238)    
Ending balance at Mar. 31, 2020 $ 1,682,886 $ 21,610 $ 920,190 $ (51,789) $ 601,771 $ (87,440) $ 278,544
Ending balance (in shares) at Mar. 31, 2020   38,346,883