Debt Facilities - Interest Charges (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Interest expense	$ 479,684	$ 521,494	$ 478,698
Interest capitalized	32,173	19,880	22,625
Interest charges incurred	511,857	541,374	501,323
Cash paid for interest	$ 521,600	$ 476,900	$ 422,200