Interest Rate Swaps - Impact of Interest Rate Swaps on Consolidated Statements of Operations - (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative [Line Items]
Total interest expense presented in the Consolidated Statement of Operations in which the effects of cash flow hedges are recorded (line item “Interest expense”)	$ 7,299	$ 6,785	$ 22,176	$ 19,511
Increase in interest expense	8,200		8,200
Interest Rate Swap
Derivative [Line Items]
Total interest expense presented in the Consolidated Statement of Operations in which the effects of cash flow hedges are recorded (line item “Interest expense”)	7,299	6,785	22,176	19,511
Interest Rate Swap | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Derivative [Line Items]
Amount of loss recognized in AOCI on derivatives	(46)	(2,642)	(17,364)	(14,678)
Reclassification out of Accumulated Other Comprehensive Income | Interest Rate Swap | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Derivative [Line Items]
Amount of (loss) gain reclassified from AOCI into earnings under “Interest expense”	$ (2,093)	$ 454	$ (4,217)	$ 2,094