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Stockholders' Equity Schedule of Compensation Costs (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Restricted Stock |  |
Class of Stock [Line Items] |  |
Compensation cost | $ 1,703 | $ 684
Restricted Stock Units (RSUs) |  |
Class of Stock [Line Items] |  |
Compensation cost | 84 | 1,062
Employee Stock Option |  |
Class of Stock [Line Items] |  |
Compensation cost | $ 750 | $ 441

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