Supplemental Data - Statements of Cash Flows (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019
Supplemental Data - Statements of Cash Flows
Cash paid for interest (including capitalized interest)		$ 404,158	$ 445,713
Cash received for interest		5,153	12,962
Cash paid for income taxes		4,294	18,350
Capitalized interest (1)	[1]	451,026	500,222
Employee benefits paid in Class A common stock		28,301	27,004
Reclassification of a receivable from noncurrent to current			$ 140,810
Tax impact of the CARES Act		$ 97,256

[1] See Note 2 for further information.