Interest Expense (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2024	Sep. 30, 2023	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Jun. 26, 2023
Debt Instrument [Line Items]
Accretion of original issue discount on 2018 Term Loan Facility	$ 521		$ 1,308	$ 1,041	$ 1,476
Amortization of debt issuance costs and modification costs	$ 749		2,488	$ 1,497	$ 3,143
Realized gain on interest rate swap termination		$ 6,900	6,900
AOCI including portion attributable to noncontrolling interest, period increase (decrease)			13,500
2018 Term Loan Facility
Debt Instrument [Line Items]
Accretion of original issue discount on 2018 Term Loan Facility			1,200
Amortization of debt issuance costs and modification costs			$ 1,900
Secured Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	4.625%			4.625%
Secured Notes | 2023 Senior Secured Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	9.875%	9.875%		9.875%
Long-term debt, gross	$ 450,000	$ 450,000		$ 450,000		$ 450,000
Secured Notes | 2020 Senior Secured Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	4.625%			4.625%
Long-term debt, gross	$ 500,000			$ 500,000		$ 500,000
2018 Term Loan Facility
Debt Instrument [Line Items]
Long-term debt, gross							$ 433,700