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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Balance at at Dec. 31, 2014 $ 347,489 $ 649 $ 526,669 $ (96,953) $ (82,876)
Balance at (in shares) at Dec. 31, 2014   64,854,950      
Stock-based compensation plans          
Grant of restricted stock 0 $ 2 (2)    
Grant of restricted stock (in shares)   170,800      
Issuance of common shares, net of withholdings (1,310) $ 1 (1,311)    
Withholdings of common shares, net of issuances (in shares)   137,457      
Forfeited restricted stock 0 $ 0 0    
Stock Repurchased and Retired During Period, Shares   (1,079,167)      
Stock Repurchased and Retired During Period, Value (10,345) $ (11) (10,334)    
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation 783   783    
Forfeited restricted stock (in shares)   (6,900)      
Amortization of stock awards and restricted stock 2,454   2,454    
Total comprehensive income (loss) 25,086     41,222 (16,136)
Balance at at Dec. 31, 2015 364,157 $ 641 518,259 (55,731) (99,012)
Balance at (in shares) at Dec. 31, 2015   64,077,140      
Stock-based compensation plans          
Grant of restricted stock 0 $ 2 (2)    
Grant of restricted stock (in shares)   171,500      
Issuance of common shares, net of withholdings (2,300) $ 0 (2,300)    
Issuance of common shares, net of withholdings (in shares)   42,796      
Forfeited restricted stock 0 $ 0 0    
Stock Repurchased and Retired During Period, Shares   (4,825,545)      
Stock Repurchased and Retired During Period, Value (63,570) $ (48) (63,522)    
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation 1,087   1,087    
Adjustments to Additional Paid in Capital, Warrant Issued (13,271)   13,271    
Forfeited restricted stock (in shares)   (4,600)      
Amortization of stock awards and restricted stock 3,165   3,165    
Total comprehensive income (loss) 42,634     23,488 19,146
Balance at at Dec. 31, 2016 $ 331,902 $ 595 443,416 (32,243) (79,866)
Balance at (in shares) at Dec. 31, 2016 59,461,291 59,461,291      
Stock-based compensation plans          
Grant of restricted stock $ 0 $ 1 (1)    
Grant of restricted stock (in shares)   113,000      
Issuance of common shares, net of withholdings (2,914) $ 0 (2,914)    
Withholdings of common shares, net of issuances (in shares)   17,441      
Forfeited restricted stock 0 $ 0 0    
Stock Repurchased and Retired During Period, Shares   (530,637)      
Stock Repurchased and Retired During Period, Value (11,184) $ (5) (11,179)    
Adjustments to Additional Paid in Capital, Warrant Issued (38,502)   (38,502)    
Forfeited restricted stock (in shares)   (3,900)      
Amortization of stock awards and restricted stock 3,632   3,632    
Total comprehensive income (loss) 35,341     18,495 16,846
Balance at at Dec. 31, 2017 $ 395,279 $ 591 $ 471,456 $ (13,748) $ (63,020)
Balance at (in shares) at Dec. 31, 2017 59,057,195 59,057,195