Commitments and Contingencies - Gains (Losses) Related to Interest Rate Derivatives Designated as Hedges of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amounts Related To Interest Rate Derivatives Included In Income Designated As Hedges Of Cash Flows [Line Items]
Amount of loss reclassified from accumulated other comprehensive loss to interest expense	$ (264,815)	$ (422,952)	$ (302,045)
Amount of (loss) gain recognized in other comprehensive income	(3,169)	(1,380)	2,651
Amounts Reclassified from Accumulated Other Comprehensive Loss
Amounts Related To Interest Rate Derivatives Included In Income Designated As Hedges Of Cash Flows [Line Items]
Amount of loss reclassified from accumulated other comprehensive loss to interest expense	$ (2,912)	$ (1,808)	$ (3,493)