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Debt Facilities - Interest Charges (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Interest expense	$ 406,466	$ 479,684	$ 521,494
Interest capitalized	26,750	32,173	19,880
Interest charges incurred	433,216	511,857	541,374
Cash paid for interest	$ 471,700	$ 521,600	$ 476,900

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Amount of interest capitalized during the period.

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Total interest costs incurred during the period and either capitalized or charged against earnings.

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