Other Real Estate Owned and Other Repossessed Assets - Expenses Related to Foreclosed and Repossessed Assets (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other Real Estate And Foreclosed Assets [Abstract]
Net (gain) loss on sales	$ 12	$ 10
Provision for unrealized losses, net	1	80
Operating expenses, net of rental income	72	141
Total expenses	$ 85	$ 231