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Debt - Senior Debt (Details) - USD ($)			9 Months Ended
Debt - Senior Debt (Details) - USD ($)	May 28, 2021	May 04, 2021	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Debt Instrument, Redemption [Line Items]
Loss on debt extinguishment			$ 77,940,000	$ 0
Senior Secured Credit Facility \| Secured Credit Facility
Debt Instrument, Redemption [Line Items]
Maximum borrowing capacity under credit facility			410,000,000
Senior Notes
Debt Instrument, Redemption [Line Items]
Loss on debt extinguishment			$ 77,900,000
Senior Notes \| Senior Notes, 8.250%, Due 2025
Debt Instrument, Redemption [Line Items]
Proceeds from redemption of senior debt	$ 298,725,000	$ 500,000
Interest Rate %			8.25%
Redemption price, as a percentage	104.125%	104.125%
Lines of credit \| Secured Credit Facility
Debt Instrument, Redemption [Line Items]
Amount borrowed on line of credit			$ 0		$ 0