Revenue from Contracts with Customers (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) revenueStream segment	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Revenue from Contract with Customer [Abstract]
Number of geographic segments (in segments) | segment			2
Number of revenue streams (in revenue streams) | revenueStream			3
Revenue from sales to customers	$ 687,549	$ 425,324	$ 2,038,905	$ 1,311,627
Receivables from contracts with customers	$ 144,000		$ 144,000		$ 135,200