Supplemental Financial Statement Information (Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]
Purchases of property and equipment in accounts payable	$ 5,305	$ 16,098	$ 1,301
Cash interest paid	124,084	151,857	157,709
Cash income tax payments, net of refunds	$ 4,337	$ 20,185	$ 27,109