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Consolidated Condensed Statement of Changes In Shareholders' Equity - 3 months ended Mar. 31, 2017 - USD ($)
$ in Thousands
Total
Common Stock
Paid-in Capital
Accumulated Other Comprehensive Loss
Accumulated 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 36,534,464 36,534,000      
Cumulative effect of accounting change due to adoption of ASU 2016-09 $ 1,496       1,496
Exercise of Common Stock options for cash 881 $ 1,206 (325)    
Exercise of Common Stock options for cash (in shares)   87,000      
Cancellation of restricted stock (926) $ (926)      
Cancellation of restricted stock (in shares)   (27,000)      
Stock option compensation 1,178   1,178    
Common Stock issued to Board of Directors and employees 1,125 $ 1,125      
Common Stock issued to Board of Directors and employees (in shares)   134,000      
Currency translation, net 5,512     5,512  
Foreign currency hedge, net 2,165     2,165  
Commodity hedge, net 21     21  
Net income 25,402       25,402
Ending Balance at Mar. 31, 2017 $ 497,259 $ 263,656 $ 11,176 $ (61,393) $ 283,820
Ending Balance (in shares) at Mar. 31, 2017 36,727,501 36,728,000