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Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income
Treasury Stock
Balance at Dec. 31, 2013 $ 841,279 $ 486 $ 207,418 $ 615,289 $ 18,086  
Balance (in shares) at Dec. 31, 2013   48,712        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 63,531     63,531    
Translation adjustment, net of tax (24,896)       (24,896)  
Pension adjustment net of tax (370)       (370)  
Options exercised 4,582 $ 2 4,580      
Options exercised (in shares)   161        
Stock-based compensation expense 12,354   12,354      
Tax benefit of options exercised (268)   (268)      
Repurchase of common stock (2,981)         $ (2,981)
Repurchase of common stock (in shares)   (95)        
Retirement of common stock   $ (1)   (2,980)   2,981
Cash dividends declared on common stock, $0.62, $0.545 and $0.375 per share for the year ended December 31, 2015, 2014 and 2013, respectively (26,666)     (26,666)    
Shares issued from release of restricted stock units (3,502) $ 2 (3,504)      
Shares issued from release of restricted stock units (in shares)   177        
Common stock issued at $34.32, $35.87 and $33.81 for the years ended December 31, 2015, 2014 and 2013 During Period, Value, Share-based Compensation, Net of Forfeitures 402   402      
Common stock issued (in shares)   11        
Balance at Dec. 31, 2014 863,465 $ 489 220,982 649,174 (7,180)  
Balance (in shares) at Dec. 31, 2014   48,966        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 67,888     67,888    
Translation adjustment, net of tax (20,939)       (20,939)  
Pension adjustment net of tax (457)       (457)  
Options exercised 9,720 $ 3 9,717      
Options exercised (in shares)   331        
Stock-based compensation expense 10,997   10,997      
Tax benefit of options exercised (318)   (318)      
Repurchase of common stock (47,144)         (47,144)
Repurchase of common stock (in shares)   (1,339)        
Retirement of common stock   $ (13)   (47,131)   47,144
Cash dividends declared on common stock, $0.62, $0.545 and $0.375 per share for the year ended December 31, 2015, 2014 and 2013, respectively (30,224)     (30,224)    
Shares issued from release of restricted stock units (3,716) $ 2 (3,718)      
Shares issued from release of restricted stock units (in shares)   210        
Common stock issued at $34.32, $35.87 and $33.81 for the years ended December 31, 2015, 2014 and 2013 During Period, Value, Share-based Compensation, Net of Forfeitures 552   552      
Common stock issued (in shares)   16        
Balance at Dec. 31, 2015 $ 849,824 $ 481 238,212 639,707 (28,576)  
Balance (in shares) at Dec. 31, 2015 48,184 48,184        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income $ 89,734     89,734    
Translation adjustment, net of tax (3,920)       (3,920)  
Pension adjustment net of tax (474)       (474)  
Options exercised 7,976 $ 3 7,973      
Options exercised (in shares)   270        
Stock-based compensation expense 13,186   13,186      
Tax benefit of options exercised 251   251      
Repurchase of common stock (53,502)         (53,502)
Repurchase of common stock (in shares)   (1,244)        
Retirement of common stock   $ (13)   (53,489)   $ 53,502
Cash dividends declared on common stock, $0.62, $0.545 and $0.375 per share for the year ended December 31, 2015, 2014 and 2013, respectively (33,530)     (33,530)    
Shares issued from release of restricted stock units (4,018) $ 2 (4,020)      
Shares issued from release of restricted stock units (in shares)   217        
Common stock issued at $34.32, $35.87 and $33.81 for the years ended December 31, 2015, 2014 and 2013 During Period, Value, Share-based Compensation, Net of Forfeitures 315   315      
Common stock issued (in shares)   10        
Balance at Dec. 31, 2016 $ 865,842 $ 473 $ 255,917 $ 642,422 $ (32,970)  
Balance (in shares) at Dec. 31, 2016 47,437 47,437