Derivative Financial Instruments - Summary of Changes in AOCL (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss beginning of period			$ 2,132,894
Realized loss reclassified from accumulated other comprehensive loss to interest expense	$ 230	$ 229	688	$ 687
Accumulated other comprehensive loss end of period	2,249,888		2,249,888
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss beginning of period	(5,500)	(6,417)	(5,958)	(6,875)
Accumulated other comprehensive loss end of period	$ (5,270)	$ (6,188)	$ (5,270)	$ (6,188)