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Fair Value Measurements And Derivative Instruments (Narrative) (Details 4) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2018
Derivatives, Fair Value [Line Items]
Effective interest rate	4.20%
Repayments of Secured Debt	$ 400,000,000	$ 896,214,000	$ 350,140,000
Interest expense	68,760,000	98,074,000	$ 127,331,000
host financial instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives	7,000,000
Derivatives not designated as hedges:
Derivatives, Fair Value [Line Items]
Liability Derivatives	2,000	1,063,000
Other long-term obligations | host financial instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives	4,400,000
2018 Credit Agreement [Member] | Senior Subordinated Notes [Member]
Derivatives, Fair Value [Line Items]
Repayments of Secured Debt		500,000,000
Interest rate swap
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 500,000,000
Derivative, Term of Contract	2 years
Effective interest rate				5.10%
Assets, Fair Value Disclosure	$ 5,900,000
Interest rate swap | Derivatives not designated as hedges:
Derivatives, Fair Value [Line Items]
Interest expense	900,000
Interest rate swap | Other Current Liabilities [Member] | Derivatives not designated as hedges:
Derivatives, Fair Value [Line Items]
Liability Derivatives		$ 952,000
Interest rate swap | Derivatives not designated as hedges:
Derivatives, Fair Value [Line Items]
Derivative, notional amount	250,000,000
Interest rate swap 2
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 500,000,000
Derivative, Term of Contract	5 years
Interest Rate Swap Four
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 250,000,000
Plan
Derivatives, Fair Value [Line Items]
Effective interest rate	3.95%
Plan | Interest rate swap
Derivatives, Fair Value [Line Items]
Effective interest rate				4.85%

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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- Definition

Nominal or face amount used to calculate payment on derivative.

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Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of the cost of borrowed funds accounted for as interest expense.

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