Revenues (Schedule of Contract with Customer, Assets and Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Contract Liabilities
Beginning balance	$ 431,177	$ 360,416
Consideration earned during the period	(31,897)	(43,967)
Consideration received during the period	68,389	61,221
Ending balance	$ 467,669	$ 377,670