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Performance Awards - Schedule of Performance Activity (Details) - 2014 EIP - Performance Awards
$ in Thousands
6 Months Ended
Jun. 30, 2019
USD ($)
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]  
Grant Amount $ 4,608
Adjustments (102)
Forfeitures (196)
Adjusted Award Value 4,310
November 2016  
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]  
Grant Amount 1,434
Adjustments (7)
Forfeitures (88)
Adjusted Award Value $ 1,339
Remaining Periods (in Months) to Vesting 4 years
November 2017  
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]  
Grant Amount $ 1,584
Adjustments (36)
Forfeitures (53)
Adjusted Award Value $ 1,495
Remaining Periods (in Months) to Vesting 16 years
November 2018  
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]  
Grant Amount $ 1,590
Adjustments (59)
Forfeitures (55)
Adjusted Award Value $ 1,476
Remaining Periods (in Months) to Vesting 28 years