Statement of Cash Flows Supplemental Disclosure - Supplemental Disclosures of Cash Flow Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Supplemental Cash Flow Information [Line Items]
Interest on deposits and borrowings	$ 2,425	$ 2,090
Supplemental schedule of noncash activities:
Transfers from loans to real estate owned and other repossessed assets		303
Accretion of securities held to maturity	50	53
James & Sons Insurance Company [Member]
Supplemental schedule of noncash activities:
Issuance of common stock		$ 1,508
Ohio Legacy Corp. [Member]
Supplemental schedule of noncash activities:
Issuance of common stock	25,816
Net assets acquired excluding cash and cash equivalents	$ 36