Summary of Amount of Gain or Loss Recognized in AOCI in Consolidated Statements of Comprehensive Income Related to Company's Derivative Assets and Liabilities (Detail) - Derivatives Designated as Hedging Instruments [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in other Comprehensive Income on Derivatives (Effective Portion)	$ (2,894)	$ (7,034)
Interest Rate Products [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in other Comprehensive Income on Derivatives (Effective Portion)	$ (2,894)	$ (7,034)