Business Combination - Additional Information (Detail) $ / shares in Units, $ in Thousands			3 Months Ended	12 Months Ended
	Dec. 30, 2015 USD ($) $ / shares	Oct. 11, 2013 USD ($) $ / shares shares	Mar. 31, 2013 Location $ / shares	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Business Acquisition [Line Items]
Merger cost				$ 308	$ 0	$ 2,396
Deferred tax asset included in accrued interest receivable and other assets				6,470	7,297
Loans acquired with evidence of credit quality deterioration				2,225
Gross loans acquired				256,418
Combined yield and credit mark				8,681
Goodwill arising from Acquisition				27,194	$ 27,194	27,194
Farmers Citizens Bank [Member]
Business Acquisition [Line Items]
Outstanding equity interests of FC Banc Corp.			100.00%
Business acquisition share price | $ / shares		$ 17.91	$ 30.00
Number of branch locations | Location			8
Fair value of total consideration transferred		$ 41,600				41,574
Total consideration paid to FC Banc Corp. shareholders in cash		$ 8,000				8,013
Total consideration paid to FC Banc Corp. shareholders in shares | shares		1,873,879
Total value of common stock		$ 33,600				33,561
Total assets acquired						360,028
Total loans acquired						247,737
Deferred tax asset included in accrued interest receivable and other assets				5,696
Goodwill arising from Acquisition				16,248		16,248
Lake National Bank of Mentor, Ohio [Member]
Business Acquisition [Line Items]
Business acquisition share price | $ / shares	$ 22.50
Fair value of total consideration transferred	$ 24,750
Total assets acquired	153,000
Total loans acquired	122,300
Total deposits acquired	$ 134,800
Merger cost				$ 308		$ 2,396