Long-Term Debt and Credit Facilities - Senior Credit Facilities (Details) - USD ($) $ in Thousands					3 Months Ended		9 Months Ended
	Jul. 12, 2023	Jul. 11, 2023	Dec. 09, 2021	Jul. 13, 2018	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2019	Jul. 12, 2017
Long-Term Debt and Credit Facilities.
Outstanding debt					$ 1,091,996		$ 1,091,996		$ 1,096,837
Amount of cash payment							48,529	$ 59,209
Gain on early extinguishment of debt, net					571	$ 4,696	16,129	$ (4,305)
2026 notes
Long-Term Debt and Credit Facilities.
Principal amount											$ 1,000,000
Outstanding debt		$ 24,000			$ 0		$ 0		$ 980,000
Amount exchanged		$ 956,000	$ 662,700
Interest rate (in percent)					11.50%		11.50%
New 11.500% First-Priority Senior Secured Notes Due 2026
Long-Term Debt and Credit Facilities.
Interest rate (in percent)		11.50%
Amount of minimum unrestricted cash remaining after the interest payment		$ 15,000
2023 Term Loans
Long-Term Debt and Credit Facilities.
Principal amount											350,000
Original issue discount											7,000
Outstanding debt	$ 48,400
Amount exchanged			212,100
Amount exchanged for cash			84,300
Amount of cash payment	44,800
Gain on early extinguishment of debt, net					$ 600		$ 600
2023 Term Loans | 2026 notes
Long-Term Debt and Credit Facilities.
Applicable margin rate				5.50%
2023 Term Loans | New 11.500% First-Priority Senior Secured Notes Due 2026
Long-Term Debt and Credit Facilities.
Principal amount	$ 3,000
Interest rate (in percent)	11.50%
2023 Term Loans | LIBOR
Long-Term Debt and Credit Facilities.
Floor interest rate (in percent)				1.00%
Adjustment rate on variable rate (in percent)				6.50%
2023 Term Loans | Federal funds
Long-Term Debt and Credit Facilities.
Applicable margin rate				0.50%
2023 Term Loans | Base rate | New 11.500% First-Priority Senior Secured Notes Due 2026
Long-Term Debt and Credit Facilities.
Amount exchanged for Notes			$ 127,800
Interest rate (in percent)			11.50%
Repricing Term Loans
Long-Term Debt and Credit Facilities.
Outstanding debt				$ 343,400
2018 Incremental Term Loans
Long-Term Debt and Credit Facilities.
Amount borrowed				30,000
2019 Incremental Term Loans
Long-Term Debt and Credit Facilities.
Amount borrowed				$ 30,000
Senior secured revolving facility
Long-Term Debt and Credit Facilities.
Maximum borrowing capacity										$ 100,000	$ 100,000
Letters of credit outstanding										$ 500