Derivatives - Schedule of Changes in Fair Value of Derivative Assets and Liabilities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (531)	$ 593	$ (1,545)	$ 363
Derivative Instruments Designated As Hedging Instruments Interest Income	424	557	854	938
Derivative, Net Hedge Ineffectiveness Gain (Loss)	$ 26	$ 12	$ 41	$ 21