Derivative Instruments and Hedging Activities - Interest Rate Derivatives Designated as Cash Flow Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Amounts Related To Interest Rate Derivatives Included In Income Designated As Hedges Of Cash Flows [Line Items]
Amount of gain (loss) reclassified from accumulated other comprehensive loss to interest expense	$ (65,966)	$ (107,508)	$ (164,420)	$ (209,084)
Amount of loss recognized in other comprehensive income	(1,773)	(962)	(3,253)	(1,512)
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 gain (loss) reclassified from accumulated other comprehensive loss to interest expense	$ 438	$ (383)	$ (177)	$ (673)