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Performance Awards - Summary of Grant Activity (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Grant Amount $ 0
2014 EIP | Performance Awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Grant Amount 4,608,000
Adjustments (53,000)
Forfeitures (483,000)
Payments (1,346,000)
Adjusted Award Value at December 31, 2019 2,726,000
2014 EIP | November 2016 | Performance Awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Grant Amount 1,434,000
Adjustments 0
Forfeitures (88,000)
Payments (1,346,000)
Adjusted Award Value at December 31, 2019 $ 0
Remaining Periods (in Months) to Vesting 0 months
2014 EIP | November 2017 | Performance Awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Grant Amount $ 1,584,000
Adjustments (16,000)
Forfeitures (195,000)
Payments 0
Adjusted Award Value at December 31, 2019 $ 1,373,000
Remaining Periods (in Months) to Vesting 9 months
2014 EIP | November 2018 | Performance Awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Grant Amount $ 1,590,000
Adjustments (37,000)
Forfeitures (200,000)
Payments 0
Adjusted Award Value at December 31, 2019 $ 1,353,000
Remaining Periods (in Months) to Vesting 21 months