Derivative Instruments and Hedging Activities - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Accumulated other comprehensive income (loss) (In thousands):
Beginning Balance	$ 265,194
Ending Balance	226,420
Accumulated Other Comprehensive Income [Member]
Accumulated other comprehensive income (loss) (In thousands):
Beginning Balance	2,284
Ending Balance	220
Income (Losses) on Cash Flow Hedges [Member]
Accumulated other comprehensive income (loss) (In thousands):
Other comprehensive loss before reclassifications	(1,435)
Amounts reclassified from accumulated other comprehensive income to interest expense	(629)
Unrealized loss on derivatives, net of tax	$ (2,064)