Derivatives - Effect of Our Derivative Financial Instruments on Our Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Amount of Gain or (Loss) Recognized in Other Comprehensive Income on Derivative Instruments	$ 300	$ (2,800)	$ (22,100)	$ (18,600)
Amount of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Interest Expense	3,700	(800)	6,400	(3,100)
Interest Expense	$ (20,260)	$ (15,534)	$ (54,300)	$ (46,986)