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Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Common Stock [Member]
Treasury Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Retained Earnings [Member]
Cumulative Effect of Adoption Adjustment
Retained Earnings [Member]
Cumulative Effect of Adoption Adjustment
Total
Beginning Balance at Dec. 31, 2018 $ 527 $ (125,452) $ 256,806 $ (453)   $ 1,082,169   $ 1,213,597
Beginning Balance, shares at Dec. 31, 2018 52,690 4,489            
Comprehensive income       $ 453   259,175   259,628
Common stock purchased for treasury   $ (35,786)           (35,786)
Common stock purchased for treasury, shares   376            
Restricted shares forfeited, shares   16            
Share-based compensation $ 2 $ (8,127) 10,298         2,173
Share-based compensation, shares 152 68            
Exercise of stock options $ 2   3,819         3,821
Exercise of stock options, shares 212              
Ending Balance (ASU 2016-13) at Dec. 31, 2019         $ (3,832)   $ (3,832)  
Ending Balance at Dec. 31, 2019 $ 531 $ (169,365) 270,923     1,341,344   1,443,433
Ending Balance, shares at Dec. 31, 2019 53,054 4,949            
Comprehensive income           257,196   257,196
Common stock purchased for treasury   $ (129,045)           (129,045)
Common stock purchased for treasury, shares   1,602            
Restricted shares forfeited, shares   15            
Share-based compensation $ 1 $ (4,969) 10,662         5,694
Share-based compensation, shares 167 62            
Exercise of stock options $ 1   882         883
Exercise of stock options, shares 56              
Ending Balance at Dec. 31, 2020 $ 533 $ (303,379) 282,467     1,594,708   1,574,329
Ending Balance, shares at Dec. 31, 2020 53,277 6,628            
Comprehensive income           260,344   260,344
Common stock purchased for treasury   $ (797,838)           (797,838)
Common stock purchased for treasury, shares   9,199            
Restricted shares forfeited, shares   32            
Share-based compensation $ 1 $ (5,994) 11,525         5,532
Share-based compensation, shares 184 56            
Exercise of stock options $ 2   2,678         2,680
Exercise of stock options, shares 176              
Ending Balance at Dec. 31, 2021 $ 536 $ (1,107,211) $ 296,670     $ 1,855,052   $ 1,045,047
Ending Balance, shares at Dec. 31, 2021 53,637 15,915