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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Treasury Stock [Member]
Treasury Stock [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Common stock [Member]
Preferred Shares Issued [Member]
Additional Paid-In Capital [Member]
Additional Paid-In Capital [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Retained Earnings [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Beginning balance at Dec. 31, 2017 $ 439,988 $ 0 $ 439,988 $ (105,123) $ (105,123) $ 458   $ 86,186 $ 86,186 $ 464,748 $ (3,601) $ 461,147 $ (6,281) $ 3,601 $ (2,680)
Beginning balance, shares (in shares) at Dec. 31, 2017       11,043   45,778 10                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                              
Vesting of performance share units (1,273)     $ (1,273)   $ 1   (1)              
Vesting of performance share units, shares (in shares)       43 [1]   127                  
Grants and vesting of restricted stock (154)     $ (154)   $ 1   (1)              
Grants and vesting of restricted stock (in shares)       (4) [1]   (80)                  
Stock option exercises (11,185)     $ (47,772)   $ 19   36,568              
Stock option exercises, shares (in shares)       1,314 [1]   1,890                  
Retirement of treasury shares 0     $ 49,199   $ (14)   (49,185)              
Retirement of treasury shares, shares (in shares)       (1,361) [1]   (1,361)                  
Purchases of treasury stock (25,276)     $ (25,276)                      
Purchases of treasury stock, shares (in shares)       (688)                      
Share-based compensation 12,786             12,786              
Net income 117,051                 117,051          
Other comprehensive income (loss), net of taxes (4,748)                       (4,748)    
Reclassification of income taxes upon adoption of ASU 2018-02 0                 582     (582)    
Declaration of dividends (25,556)                 (25,556)          
Ending balance at Dec. 31, 2018 $ 501,633     $ (130,399)   $ 465   86,353   553,224     (8,010)    
Ending balance, shares (in shares) at Dec. 31, 2018       11,731   46,514 10                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                              
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201613Member                            
Vesting of performance share units $ (2,069)     $ (2,069)   $ 2   (2)              
Vesting of performance share units, shares (in shares)       56 [1]   148                  
Grants and vesting of restricted stock (1,183)     $ (1,183)                      
Grants and vesting of restricted stock (in shares)       (41) [1]   (50)                  
Vesting of restricted stock units (259)     $ (259)                      
Vesting of restricted stock units (in shares)       10 [1]   25                  
Stock option exercises 41     $ (2,622)   $ 2   2,661              
Stock option exercises, shares (in shares)       79 [1]   151                  
Common stock issued 147             147              
Common stock issued (in shares)           5                  
Retirement of treasury shares 0     $ 6,133   $ (2)   (6,131)              
Retirement of treasury shares, shares (in shares)       (186) [1]   (186)                  
Purchases of treasury stock (66,186)     $ (66,186)                      
Purchases of treasury stock, shares (in shares)       (2,338)                      
Share-based compensation 13,008             13,008              
Net income 46,514                 46,514          
Other comprehensive income (loss), net of taxes 28,374                       28,374    
Declaration of dividends (26,119)                 (26,119)          
Ending balance at Dec. 31, 2019 493,901 $ 0 $ 493,901 $ (196,585) $ (196,585) $ 467   96,036 $ 96,036 573,619 $ (597) $ 573,022 20,364 $ 597 $ 20,961
Ending balance, shares (in shares) at Dec. 31, 2019       14,069   46,707 10                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                              
Vesting of performance share units (646)     $ (646)   $ 1   (1)              
Vesting of performance share units, shares (in shares)       25 [1]   83                  
Grants and vesting of restricted stock (61)     $ (61)                      
Grants and vesting of restricted stock (in shares) [1]       (4)                      
Vesting of restricted stock units $ (608)     $ (608)                      
Vesting of restricted stock units (in shares)       35 [1]   90                  
Stock option exercises, shares (in shares) 0                            
Common stock issued $ 30             30              
Common stock issued (in shares)           1                  
Retirement of treasury shares 0     $ 1,315       (1,315)              
Retirement of treasury shares, shares (in shares)       (64) [1]   (64)                  
Purchases of treasury stock (28,921)     $ (28,921)                      
Purchases of treasury stock, shares (in shares)       (1,611)                      
Share-based compensation 8,695             8,695              
Net income 19,105                 19,105          
Other comprehensive income (loss), net of taxes (17,618)                       (17,618)    
Declaration of dividends (24,615)                 (24,615)          
Ending balance at Dec. 31, 2020 $ 449,262     $ (225,506)   $ 468   $ 103,445   $ 567,512     $ 3,343    
Ending balance, shares (in shares) at Dec. 31, 2020       15,680   46,817 10                
[1] All shares acquired represent shares tendered to cover the strike price for options and tax withholdings on the intrinsic value of stock options exercised, restricted stock vested, performance share units vested, or restricted stock units vested. These shares have been cancelled by the Company.