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CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock Issued
Common Stock in Treasury
Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Balance (in shares) at Dec. 31, 2017   23,760 (9,703)      
Balance at Dec. 31, 2017 $ 257,633 $ 238 $ (262,065) $ 265,195 $ (16,599) $ 270,864
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 11,924         11,924
Currency translation adjustment (3,682)       (3,682)  
Shares issued for employee benefit plan and compensation (in shares)   108        
Shares issued for employee benefit plan and compensation $ 1,062 $ 1   1,061    
Purchase of treasury shares (in shares) (413)   (413)      
Purchase of treasury shares $ (13,824)   $ (13,824)      
Stock options exercised (in shares) 35 35        
Stock options exercised $ 864 $ 0   864    
Shares Issued to directors (in shares)   30        
Shares issued to directors 0 $ 0   0    
Employee and director stock-based compensation 8,820     8,820    
Performance-based common stock warrants 163     163    
Balance (in shares) at Dec. 31, 2018   23,933 (10,116)      
Balance at Dec. 31, 2018 262,960 $ 239 $ (275,889) 276,103 (20,281) 282,788
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 3,630         3,630
Currency translation adjustment (2,500)       (2,500)  
Shares issued for employee benefit plan and compensation (in shares)   133        
Shares issued for employee benefit plan and compensation $ 947 $ 2   945    
Purchase of treasury shares (in shares) (58)   (58)      
Purchase of treasury shares $ (1,928)   $ (1,928)      
Stock options exercised (in shares) 22 22        
Stock options exercised $ 448 $ 0   448    
Shares Issued to directors (in shares)   30        
Shares issued to directors 0 $ 0   0    
Employee and director stock-based compensation 8,845     8,845    
Performance-based common stock warrants 1,997     1,997    
Balance (in shares) at Dec. 31, 2019   24,118 (10,174)      
Balance at Dec. 31, 2019 274,399 $ 241 $ (277,817) 288,338 (22,781) 286,418
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 38,572         38,572
Currency translation adjustment 4,259       4,259  
Shares issued for employee benefit plan and compensation (in shares)   169        
Shares issued for employee benefit plan and compensation $ 1,136 $ 1   1,135    
Purchase of treasury shares (in shares) (444)   (444)      
Purchase of treasury shares $ (17,678)   $ (17,678)      
Stock options exercised (in shares) 80 80        
Stock options exercised $ 2,805 $ 1   2,804    
Shares Issued to directors (in shares)   25        
Shares issued to directors 0 $ 1   (1)    
Employee and director stock-based compensation 9,122     9,122    
Performance-based common stock warrants 686     686    
Balance (in shares) at Dec. 31, 2020   24,392 (10,618)      
Balance at Dec. 31, 2020 $ 313,301 $ 244 $ (295,495) $ 302,084 $ (18,522) $ 324,990