Financial Commitments (Reconciliation of Outstanding Debt Balance to Reported Debt Balance) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total debt	$ 1,003,054	$ 993,654
Term Loan B
Debt Instrument [Line Items]
Outstanding Debt	418,625	419,688
Unamortized Discounts and Issuance Costs	(12,848)	(13,353)
Total debt	405,777	406,335
2017 Senior Notes | Senior Notes
Debt Instrument [Line Items]
Outstanding Debt	500,000	500,000
Unamortized Discounts and Issuance Costs	(3,502)	(3,756)
Total debt	$ 496,498	$ 496,244