Receivables (Schedule of Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 6,258	$ 1,062	$ 7,393
Charges to (recoveries of) costs and expenses, net	(902)	5,504	(5,572)
Amounts written off	(531)	(308)	(759)
Balance at end of period	$ 4,825	$ 6,258	$ 1,062