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Stockholders' Equity Schedule of Compensation Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Restricted Stock        
Class of Stock [Line Items]        
Compensation cost $ 791 $ 684 $ 2,241 $ 3,050
Restricted Stock Units (RSUs)        
Class of Stock [Line Items]        
Compensation cost 62 0 1,167 0
Employee Stock Option        
Class of Stock [Line Items]        
Compensation cost $ 756 $ 380 $ 1,695 $ 994