Revenue from Contracts with Customers (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) revenueStream segment	Jun. 30, 2020 USD ($)	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	$ 758,829	$ 285,745	$ 1,351,356	$ 886,303
Receivables from contracts with customers	$ 206,600		$ 206,600		$ 135,200