Financial Commitments (Reconciliation of Outstanding Debt Balance to Reported Debt Balance) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 15, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total debt	$ 970,244		$ 1,025,465
Term Loan B
Debt Instrument [Line Items]
Outstanding Debt	422,875		423,938
Unamortized Discounts and Issuance Costs	(14,461)		(15,480)
Total debt	408,414		408,458
Convertible Notes
Debt Instrument [Line Items]
Outstanding Debt	0	$ 69,900	69,918
Unamortized Discounts and Issuance Costs	0		(2,040)
Total debt	0		67,878
2017 Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Outstanding Debt	500,000		500,000
Unamortized Discounts and Issuance Costs	(4,251)		(4,729)
Total debt	$ 495,749		$ 495,271

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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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