Premises and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation Expenses	$ 1,400	$ 1,300	$ 1,200
Construction in Progress [Member] | Indiana [Member]
Property, Plant and Equipment [Line Items]
Additional costs anticipated in construction of building	$ 722