Financial Commitments (Reconciliation Of Outstanding Debt Balance To Reported Debt Balance) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 15, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Outstanding Debt	$ 1,010,763
Unamortized Discounts and Issuance Costs	(17,109)
Total debt	993,654		$ 1,025,465
Term Loan B
Debt Instrument [Line Items]
Outstanding Debt	419,688		423,938
Unamortized Discounts and Issuance Costs	(13,353)		(15,480)
Total debt	406,335		408,458
Convertible Notes
Debt Instrument [Line Items]
Outstanding Debt		$ 69,900	69,918
Unamortized Discounts and Issuance Costs			(2,040)
Total debt	0		67,878
2017 Senior Notes | 2017 Senior Notes
Debt Instrument [Line Items]
Outstanding Debt	500,000		500,000
Unamortized Discounts and Issuance Costs	(3,756)		(4,729)
Total debt	$ 496,244		$ 495,271