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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
Noncontrolling Interest
Balance (in shares) at Dec. 31, 2015   23,176 8,825        
Balance at Dec. 31, 2015 $ 257,908 $ 232 $ (210,333) $ 228,269 $ (15,799) $ 255,240 $ 299
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 20,384         20,354 30
Currency translation adjustment (7,022)       (7,022)    
Shares issued for employee benefit plan and compensation (in shares)   130          
Shares issued for employee benefit plan and compensation $ 913 $ 1   912      
Purchase of treasury shares (in shares) (198)   (198)        
Purchase of treasury shares $ (12,647)   $ (12,647)        
Stock options exercised (in shares) 239 239          
Stock options exercised $ 6,244 $ 3   6,241      
Shares Issued to directors (in shares)   30          
Shares issued to directors 0 $ 0   0      
Employee and director stock-based compensation 10,324     10,324      
Tax benefit from exercise of non-qualified stock options and vested restricted stock 2,007     2,007      
Performance - based common stock warrants 2,728     2,728      
Deconsolidation of Encore Controls LLC (329)           (329)
Balance (in shares) at Dec. 31, 2016   23,575 9,023        
Balance at Dec. 31, 2016 280,510 $ 236 $ (222,980) 250,481 (22,821) 275,594 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Impact to retained earnings from adoption of new accounting pronouncement 1,509         1,509  
Balance at January 1 282,019 $ 236 $ (222,980) 250,481 (22,821) 277,103 0
Net income (loss) (10,323)         (10,323)  
Currency translation adjustment 6,222       6,222    
Shares issued for employee benefit plan and compensation (in shares)   99          
Shares issued for employee benefit plan and compensation $ 648 $ 1   647      
Purchase of treasury shares (in shares) (680)   (680)        
Purchase of treasury shares $ (39,085)   $ (39,085)        
Stock options exercised (in shares) 56 56          
Stock options exercised $ 1,442 $ 1   1,441      
Shares Issued to directors (in shares)   30          
Shares issued to directors 0 $ 0   0      
Employee and director stock-based compensation 11,943     11,943      
Performance-based common stock warrants 683     683      
Balance (in shares) at Dec. 31, 2017   23,760 9,703        
Balance at Dec. 31, 2017 253,549 $ 238 $ (262,065) 265,195 (16,599) 266,780 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Impact to retained earnings from adoption of new accounting pronouncement 4,084         4,084  
Balance at January 1 257,633 $ 238 $ (262,065) 265,195 (16,599) 270,864 0
Net income (loss) 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 $ 0