Derivatives and Hedging Activities (Derivatives Included in AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Derivative [Line Items]
Amount of loss recognized in accumulated other comprehensive loss on interest rate derivatives	$ (37,265)	$ (2,419)
Total amount of interest expense presented in the consolidated statements of operations and comprehensive loss	(13,257)	(13,943)
Derivatives designated as hedging instruments: | Interest rate “pay-fixed” swaps
Derivative [Line Items]
Amount of loss recognized in accumulated other comprehensive loss on interest rate derivatives	(37,715)	(2,028)
Amount of (loss) gain reclassified from accumulated other comprehensive income into income as interest expense (effective portion)	$ (450)	$ 391