Interest Expense (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Jun. 26, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.20%			4.20%
Repayments of Long-term Debt				$ 433,708	$ 110,000
Accretion of original issue discount on 2018 Term Loan Facility	$ 526		$ 178	2,002	1,043
Amortization of debt issuance costs and modification costs	740		642	3,883	2,818
Realized gain on termination of de-designated interest rate swap	0	$ 6,900	$ 4,605	6,918	4,605
AOCI Including Portion Attributable to Noncontrolling Interest, Period Increase (Decrease)				$ 13,500
2018 Term Loan Facility
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage							7.38%
Repayments of Long-term Debt					110,000
Accretion of original issue discount on 2018 Term Loan Facility	1,200				500
Amortization of debt issuance costs and modification costs	$ 1,900				$ 800
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%
Long-term debt, gross	$ 450,000			$ 450,000			$ 0
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	$ 0			$ 0		$ 433,700	$ 433,708