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Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - 3 months ended Mar. 31, 2018 - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock [Member]
Additional Paid in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (loss) [Member]
Beginning Balance at Dec. 31, 2017 $ 486,104 $ 275 $ 292,494 $ 211,080 $ (17,745)
Beginning Balance, Shares at Dec. 31, 2017   27,572      
Net loss (5,983)     (5,983)  
Dividends declared (1,955)     (1,955)  
Share-based compensation expense 1,256 $ 1 1,255    
Share-based compensation expense, shares   87      
Shares issued for option exercises $ 242   242    
Shares issued for option exercises, shares 23 23      
Restricted shares forgiven for taxes and forfeited $ (287)   (287)    
Restricted shares forgiven for taxes and forfeited, shares   (16)      
Foreign currency translation gain (loss) 5,465       5,465
Adoption of new accounting standard (Note 1) 17     17  
Ending Balance at Mar. 31, 2018 $ 484,859 $ 276 $ 293,704 $ 203,159 $ (12,280)
Ending Balance, Shares at Mar. 31, 2018   27,666