Derivative Instruments and Hedging Activities - Schedule of Pre-tax Effect of Derivative Financial Instruments in Consolidated Statements of Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Derivatives in Cash Flow Hedging Relationships:
Gain related to effective portion of derivatives recognized in accumulated other comprehensive income (loss)	$ 14,262	$ 1,619
(Loss) gain related to effective portion of derivatives reclassified from accumulated other comprehensive income (loss) to interest expense	$ (2,697)	$ 12,733