Derivative Instruments and Hedging Activities - Gains (Losses) Related to Interest Rate Derivatives Designated as Hedges of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Amounts Related To Interest Rate Derivatives Included In Income Designated As Hedges Of Cash Flows [Line Items]
Amount of (loss) gain reclassified from accumulated other comprehensive loss to interest expense	$ (32,741)	$ (65,966)	$ (71,872)	$ (164,420)
Amount of (loss) gain recognized in other comprehensive income (loss)	(158)	(1,773)	19	(3,253)
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) gain reclassified from accumulated other comprehensive loss to interest expense	$ (749)	$ 438	$ (1,664)	$ (177)