Supplemental Financial Information - Noncash Investing and Financing Activities, Narrative and Research and Development (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Supplemental disclosure of cash flow information:
Cash paid for interest, net of amounts capitalized	$ 43,847	$ 54,572
Cash paid for income taxes	716	772
Non-cash investing and financing activities:
Employee benefits paid in Class A common stock	6,920	6,654
Increase (decrease) in capital expenditures included in accounts payable, net	(5,549)	(15,320)
Noncash net assets exchanged for BSS Transaction (Note 5)	$ (2,824)	$ 0