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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 (Loss)
Treasury Stock
Balance at Dec. 31, 2016 $ 865,842 $ 473 $ 255,917 $ 642,422 $ (32,970)  
Balance (in shares) at Dec. 31, 2016   47,437        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 92,617     92,617    
Translation adjustment, net of tax 21,418       21,418  
Pension adjustment, net of tax (944)       (944)  
Options exercised 6,610 $ 3 6,607      
Options exercised   223        
Stock-based compensation expense 12,565   12,565      
Repurchase of common stock (70,000)   (10,000)     $ (60,000)
Repurchase of common stock   (1,138)        
Retirement of common stock 0 $ (5)   (19,995)   20,000
Cash dividends declared on common stock, $0.91 per share (38,400)     (38,400)    
Shares issued from release of restricted stock units (5,341) $ 2 (5,343)      
Shares issued from release of restricted stock units (in shares)   214        
Common stock issued 411   411      
Common stock issued (in shares)   9        
Balance at Dec. 31, 2017 884,778 $ 473 260,157 676,644 (12,496) (40,000)
Balance (in shares) at Dec. 31, 2017   46,745        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 126,633     126,633    
Translation adjustment, net of tax (12,911)       (12,911)  
Pension adjustment, net of tax 376       376  
Options exercised 695 $ 0 695      
Options exercised   23        
Stock-based compensation expense 10,334   10,334      
Repurchase of common stock (110,540)   10,000     (120,540)
Repurchase of common stock   (1,955)        
Retirement of common stock 0 $ (22)   (135,518)   135,540
Cash dividends declared on common stock, $0.91 per share (39,962)     (39,962)    
Shares issued from release of restricted stock units (5,145) $ 2 (5,147)      
Shares issued from release of restricted stock units (in shares)   177        
Common stock issued 465   465      
Common stock issued (in shares)   8        
Balance at Dec. 31, 2018 $ 855,514 $ 453 276,504 628,207 (24,650) (25,000)
Balance (in shares) at Dec. 31, 2018 44,998 44,998        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Adoption of new accounting standards $ 791     410 381  
Net income 133,982     133,982    
Translation adjustment, net of tax 885       885  
Pension adjustment, net of tax (1,064)       (1,064)  
Stock-based compensation expense 9,325   9,325      
Repurchase of common stock (60,816)   0     (60,816)
Repurchase of common stock   (972)        
Retirement of common stock 0 $ (13)   (76,424)   76,437
Cash dividends declared on common stock, $0.91 per share (40,258)     (40,258)    
Shares issued from release of restricted stock units (5,903) $ 2 (5,905)      
Shares issued from release of restricted stock units (in shares)   178        
Common stock issued 292   292      
Common stock issued (in shares)   5        
Balance at Dec. 31, 2019 $ 891,957 $ 442 $ 280,216 $ 645,507 $ (24,829) $ (9,379)
Balance (in shares) at Dec. 31, 2019 44,209 44,209