Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Compensation Cost (Details)

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Stock-based Compensation - Compensation Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]        
Stock-based compensation $ 819 $ 272 $ 1,115 $ 382
Tax benefit from compensation expense 0 0 0 0
Cash received from option exercised $ 0 $ 4 $ 0 $ 9