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Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Common Stock
Treasury Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Loss
Retained Earnings
Cumulative Effect of Adoption Adjustment
Retained Earnings
Cumulative Effect of Adoption Adjustment
Total
Beginning Balance (ASU 2016-13) at Dec. 31, 2019         $ (3,832)   $ (3,832)  
Beginning Balance at Dec. 31, 2019 $ 531 $ (169,365) $ 270,923     $ 1,341,344   $ 1,443,433
Beginning Balance, shares at Dec. 31, 2019 53,054 4,949            
Comprehensive income           71,385   71,385
Common stock purchased for treasury   $ (60,737)           (60,737)
Common stock acquired, shares   787            
Restricted shares forfeited, shares   10            
Share-based compensation $ 1 $ (4,969) 2,655         (2,313)
Share-based compensation, shares 164 62            
Exercise of stock options     72         72
Exercise of stock options, shares 3              
Ending Balance at Mar. 31, 2020 $ 532 $ (235,071) 273,650     1,408,897   1,448,008
Ending Balance, shares at Mar. 31, 2020 53,221 5,808            
Comprehensive income           47,010   47,010
Common stock purchased for treasury   $ (8,311)           (8,311)
Common stock acquired, shares   111            
Share-based compensation     2,678         2,678
Share-based compensation, shares 3              
Exercise of stock options     2         2
Exercise of stock options, shares 1              
Ending Balance at Jun. 30, 2020 $ 532 $ (243,382) 276,330     1,455,907   1,489,387
Ending Balance, shares at Jun. 30, 2020 53,225 5,919            
Comprehensive income           52,046   52,046
Common stock purchased for treasury   $ (23,267)           (23,267)
Common stock acquired, shares   266            
Restricted shares forfeited, shares   1            
Share-based compensation     2,713         2,713
Exercise of stock options     104         104
Exercise of stock options, shares 6              
Ending Balance (ASU 2016-13) at Sep. 30, 2020             $ (3,832)  
Ending Balance at Sep. 30, 2020 $ 532 $ (266,649) 279,147     1,507,953   1,520,983
Ending Balance, shares at Sep. 30, 2020 53,231 6,186            
Beginning Balance at Dec. 31, 2020 $ 533 $ (303,379) 282,467     1,594,708   1,574,329
Beginning Balance, shares at Dec. 31, 2020 53,277 6,628            
Comprehensive income       $ (120)   78,112   77,992
Common stock purchased for treasury   $ (56,348) (7,000)         (63,348)
Common stock acquired, shares   567            
Share-based compensation $ 1 $ (5,994) 3,018         (2,975)
Share-based compensation, shares 180 56            
Exercise of stock options $ 2   2,678         2,680
Exercise of stock options, shares 176              
Ending Balance at Mar. 31, 2021 $ 536 $ (365,721) 281,163 (120)   1,672,820   1,588,678
Ending Balance, shares at Mar. 31, 2021 53,633 7,251            
Beginning Balance at Dec. 31, 2020 $ 533 $ (303,379) 282,467     1,594,708   1,574,329
Beginning Balance, shares at Dec. 31, 2020 53,277 6,628            
Ending Balance at Sep. 30, 2021 $ 536 $ (663,558) 293,859     1,769,939   1,400,776
Ending Balance, shares at Sep. 30, 2021 53,637 10,583            
Beginning Balance at Mar. 31, 2021 $ 536 $ (365,721) 281,163 (120)   1,672,820   1,588,678
Beginning Balance, shares at Mar. 31, 2021 53,633 7,251            
Comprehensive income       (65)   49,461   49,396
Common stock purchased for treasury   $ (95,331) (3,000)         (98,331)
Common stock acquired, shares   982            
Restricted shares forfeited, shares   8            
Share-based compensation     2,940         2,940
Share-based compensation, shares 4              
Ending Balance at Jun. 30, 2021 $ 536 $ (461,052) 281,103 (185)   1,722,281   1,542,683
Ending Balance, shares at Jun. 30, 2021 53,637 8,241            
Comprehensive income       $ 185   47,658   47,843
Common stock purchased for treasury   $ (202,506) 10,000         (192,506)
Common stock acquired, shares   2,324            
Restricted shares forfeited, shares   18            
Share-based compensation     2,756         2,756
Ending Balance at Sep. 30, 2021 $ 536 $ (663,558) $ 293,859     $ 1,769,939   $ 1,400,776
Ending Balance, shares at Sep. 30, 2021 53,637 10,583