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Performance Awards - Schedule of Performance Activity (Details) - 2014 EIP - Performance Awards
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]  
Grant Amount $ 4,608
Adjustments (154)
Forfeitures (196)
Adjusted Award Value 4,258
November 2016  
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]  
Grant Amount 1,434
Adjustments (16)
Forfeitures (88)
Adjusted Award Value $ 1,330
Remaining Periods (in Months) to Vesting 7 months
November 2017  
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]  
Grant Amount $ 1,584
Adjustments (54)
Forfeitures (53)
Adjusted Award Value $ 1,477
Remaining Periods (in Months) to Vesting 19 months
November 2018  
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]  
Grant Amount $ 1,590
Adjustments (84)
Forfeitures (55)
Adjusted Award Value $ 1,451
Remaining Periods (in Months) to Vesting 31 months