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Debt And Liquidity (Summary Of Long-Term Debt) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Unamortized debt discount and issuance costs	$ (13,641)	$ (14,449)
Total debt	920,461	1,029,688
Less: Long-term debt, current portion	(119)	(127)
Long-term debt	920,342	1,029,561
2018 Term Loan Facility
Debt Instrument [Line Items]
Long-term Debt, Gross	433,708	543,708
2020 Senior Secured Notes
Debt Instrument [Line Items]
Long-term Debt, Gross	500,000	500,000
Other debt
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 394	$ 429

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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