Supplemental Cash Flow Information - Schedule Cash Paid For Interest Expenses And Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental Cash Flow Information [Abstract]
Interest (net of capitalized interest)	$ 314,276	$ 344,464	$ 281,364
Income Taxes	$ 1,155	$ 16,073	$ 1,688