Statement of Cash Flows Supplemental Disclosure - Supplemental Disclosures of Cash Flow Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Supplemental Cash Flow Information [Abstract]
Interest on deposits and borrowings	$ 2,090	$ 2,120
Supplemental schedule of noncash activities:
Transfers from loans to real estate owned and other repossessed assets	$ 303	$ 493