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Consolidated Statements of Changes In Shareholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
AOCI Attributable to Parent
Retained Earnings
Beginning Balance at Dec. 31, 2016 $ 460,405 $ 262,251 $ 10,323 $ (69,091) $ 256,922
Beginning Balance (in shares) at Dec. 31, 2016   36,534,000      
Cumulative effect of accounting change due to adoption of ASU | ASU 2016-09 1,496       1,496
Stock repurchase (5,326) $ (5,326)      
Stock repurchase (in shares)   (164,000)      
Exercise of Common Stock options for cash $ 2,755 $ 3,662 (907)    
Exercise of Common Stock options for cash (in shares) 202,328 202,000      
Cancellation of restricted stock $ (1,837) $ (1,837)      
Cancelation of restricted stock (in shares)   (53,000)      
Stock option compensation 6,209   6,209    
Common stock issued to Board of Directors and employees 6,298 $ 6,298      
Commons stock issued to Board of Directors and employees (in shares)   242,000      
Currency translation, net 48,207     48,207  
Foreign currency hedge, net 220     220  
Commodity hedge, net 36     36  
Net gain (loss) on pension benefit obligation, net 184     184  
Net income 35,227       35,227
Ending Balance at Dec. 31, 2017 553,874 $ 265,048 15,625 (20,444) 293,645
Ending Balance (in shares) at Dec. 31, 2017   36,761,000      
Cumulative effect of accounting change due to adoption of ASU | ASU 2016-16 31,645       31,645
Cumulative effect of accounting change due to adoption of ASU | ASU 2018-02       (40) 40
Cumulative effect of accounting change due to adoption of ASU | ASU 2014-09 (3,264)       (3,264)
Stock repurchase (148,074) $ (148,074)      
Stock repurchase (in shares)   (3,470,000)      
Exercise of Common Stock options for cash $ 14,776 $ 18,755 (3,979)    
Exercise of Common Stock options for cash (in shares) 615,358 615,000      
Cancellation of restricted stock $ (1,188) $ (1,188)      
Cancelation of restricted stock (in shares)   (71,000)      
Stock option compensation 3,288   3,288    
Common stock issued to Board of Directors and employees 5,759 $ 5,759      
Commons stock issued to Board of Directors and employees (in shares)   22,000      
Currency translation, net (19,602)     (19,602)  
Foreign currency hedge, net 796     796  
Commodity hedge, net (286)     (286)  
Net gain (loss) on pension benefit obligation, net 76     76  
Net income 41,899       41,899
Ending Balance at Dec. 31, 2018 $ 479,699 $ 140,300 14,934 (39,500) 363,965
Ending Balance (in shares) at Dec. 31, 2018 33,856,629 33,857,000      
Cumulative effect of accounting change due to adoption of ASU | ASU 2016-02 $ 261       261
Stock repurchase (63,283) $ (63,283)      
Stock repurchase (in shares)   (1,595,000)      
Exercise of Common Stock options for cash $ 16,557 $ 21,524 (4,967)    
Exercise of Common Stock options for cash (in shares) 428,250 431,000      
Cancellation of restricted stock $ (1,402) $ (1,402)      
Cancelation of restricted stock (in shares)   (62,000)      
Stock option compensation 885   885    
Common stock issued to Board of Directors and employees 5,368 $ 5,368      
Commons stock issued to Board of Directors and employees (in shares)   43,000      
Currency translation, net (2,808)     (2,808)  
Foreign currency hedge, net 899     899  
Net gain (loss) on pension benefit obligation, net (1,032)     (1,032)  
Net income 37,506       37,506
Ending Balance at Dec. 31, 2019 $ 472,650 $ 102,507 $ 10,852 $ (42,441) $ 401,732
Ending Balance (in shares) at Dec. 31, 2019 32,674,354 32,674,000