Derivative Instruments (Gross Fair Value of Derivative Instruments) (Details) - Designated as Hedging Instrument [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value		$ 62,160	$ 33,497
Liability Derivatives, Fair Value		7,197	24,060
Interest rate contracts [Member] | Other Noncurrent Assets [Member]
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value		57,487	31,306
Interest rate contracts [Member] | Other Assets Current [Member]
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	4,673	2,191
Interest rate contracts [Member] | Other Long-term Obligations [Member]
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair Value		7,197	24,060
Interest rate contracts [Member] | Accounts Payable and Accrued Liabilities [Member]
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair Value	[1]	$ 0

[1] Derivative instruments that mature within one year, as a whole, are classified as current.