Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock Outstanding [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Treasury Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Balance, beginning at Dec. 31, 2014 $ (18,502)   $ 406 $ 118,419 $ (11,343) $ (90,918) $ (35,066)
Balance, Shares beginning at Dec. 31, 2014   34,056,468          
Stock-based compensation 2,370     2,370      
Exercise of stock options 3,434   5 3,429      
Exercise of stock options, Shares   512,074          
Other comprehensive income (loss), net 47,570           47,570
Net income (loss) (107,721)       (107,721)    
Balance, ending at Sep. 30, 2015 (72,849)   411 124,218 (119,064) (90,918) 12,504
Balance, Shares ending at Sep. 30, 2015   34,568,542          
Balance, beginning at Jun. 30, 2015             (23,789)
Other comprehensive income (loss), net 36,293           36,293
Net income (loss) (57,066)            
Balance, ending at Sep. 30, 2015 (72,849)   411 124,218 (119,064) (90,918) 12,504
Balance, Shares ending at Sep. 30, 2015   34,568,542          
Balance, beginning at Dec. 31, 2015 $ (62,330)   411 124,618 (96,210) (90,918) (231)
Balance, Shares beginning at Dec. 31, 2015 34,568,942 34,568,942          
Stock-based compensation $ 2,966     2,966      
Exercise of stock options 1,503   3 1,500      
Exercise of stock options, Shares   255,500          
Settlement of restricted stock units     1 (1)      
Settlement of restricted stock units, Shares   162,812          
Other comprehensive income (loss), net (27,235)           (27,235)
Net income (loss) 20,175       20,175    
Balance, ending at Sep. 30, 2016 $ (64,921)   415 129,083 (76,035) (90,918) (27,466)
Balance, Shares ending at Sep. 30, 2016 34,987,254 34,987,254          
Balance, beginning at Jun. 30, 2016             (43)
Other comprehensive income (loss), net $ (27,423)           (27,423)
Net income (loss) 29,866            
Balance, ending at Sep. 30, 2016 $ (64,921)   $ 415 $ 129,083 $ (76,035) $ (90,918) $ (27,466)
Balance, Shares ending at Sep. 30, 2016 34,987,254 34,987,254