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Stock-based Compensation - Narrative (Details) - 2015 Omnibus Incentive Plan - Restricted Stock Units (RSUs) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2016
Jun. 30, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted in period     390,352
Stock granted, value     $ 4,100
Share-based compensation expense $ 204 $ 409  
Share-based compensation expense not yet recognized $ 3,400 $ 3,400