Foreclosed Assets - Summary of Expenses Related to Foreclosed Real Estate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Banking and Thrift [Abstract]
Net loss (gain) on sale	$ 3	$ (71)	$ (252)
Operating expenses, net of rental income	169	254	81
Total	$ 172	$ 183	$ (171)