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Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Apr. 13, 2020	Sep. 27, 2018	Dec. 21, 2017
Debt Instrument [Line Items]
Principal amount of long-term debt	$ 588,125	$ 731,523
Less: unamortized discount and deferred financing costs	(17,144)	(22,930)
Total debt, net of unamortized discount and deferred financing costs	570,981	708,593
Less: current maturities, net of unamortized discount and deferred financing costs	(10,840)	(59,933)
Long-term debt, net of current maturities	$ 560,141	$ 648,660
5.00% Convertible Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument, interest rate (in percent)		5.00%
7.75% Senior Secured Notes due 2025
Debt Instrument [Line Items]
Debt instrument, interest rate (in percent)	7.75%	7.75%
12.875% Senior Secured Notes due 2026
Debt Instrument [Line Items]
Debt instrument, interest rate (in percent)	12.875%	12.875%
Convertible Debt \| 5.00% Convertible Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument, interest rate (in percent)	5.00%
Principal amount of long-term debt	$ 0	$ 48,665
Term Loan \| Retail Property Term Loan due 2024
Debt Instrument [Line Items]
Principal amount of long-term debt	0	42,494
Term Loan \| Term Loan B due 2026
Debt Instrument [Line Items]
Principal amount of long-term debt	221,875	228,125
Term Loan \| Mid Pac Term Loan due 2028
Debt Instrument [Line Items]
Debt instrument, interest rate (in percent)				4.375%
Principal amount of long-term debt	0	1,399
Term Loan \| PHL Term Loan
Debt Instrument [Line Items]
Debt instrument, interest rate (in percent)			2.75%
Principal amount of long-term debt	$ 0	5,840
Senior Notes \| 7.75% Senior Secured Notes due 2025
Debt Instrument [Line Items]
Debt instrument, interest rate (in percent)	7.75%				7.75%
Principal amount of long-term debt	$ 298,000	300,000			$ 300,000
Senior Notes \| 12.875% Senior Secured Notes due 2026
Debt Instrument [Line Items]
Debt instrument, interest rate (in percent)	12.875%
Principal amount of long-term debt	$ 68,250	105,000
Revolving Credit Facility \| ABL Credit Facility due 2022
Debt Instrument [Line Items]
Principal amount of long-term debt	0	0
Letters of credit outstanding, amount	19,500	1,700
Letters of Credit and Surety Bonds
Debt Instrument [Line Items]
Letters of credit outstanding, amount	$ 3,600	$ 3,600