Business Acquisitions (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Oct. 01, 2015	Jun. 19, 2015	Mar. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill			$ 35,090	$ 35,090
Tri-State 1st Banc Incorporation
Business Acquisition [Line Items]
Shares of stock issued for acquisition	1,296,517
Fair value of total consideration transferred	$ 14,340
Shares shareholders are entitled to elect to receive per shares	174.70%
Cash shareholders are entitled to elect to receive per share	$ 14.20
Business Acquisition Shares Being Exchanged for Stock	75.00%
Business Acquisition Shares Being Exchanged for Cash	25.00%
Business Acquisition, Effective Date of Acquisition			Oct. 01, 2015
Goodwill	$ 2,818
Fair value of other intangible assets	1,173
Tri-State 1st Banc Incorporation | Core Deposits
Business Acquisition [Line Items]
Fair value of other intangible assets	$ 1,200
Tri-State 1st Banc Incorporation | Series A Preferred Stock
Business Acquisition [Line Items]
Cash shareholders are entitled to elect to receive per share	$ 13.60
National Bancshares Corporation
Business Acquisition [Line Items]
Shares of stock issued for acquisition		7,262,955
Fair value of total consideration transferred		$ 74,780
Shares shareholders are entitled to elect to receive per shares		403.40%
Cash shareholders are entitled to elect to receive per share		$ 32.15
Business Acquisition, Effective Date of Acquisition			Jun. 19, 2015
Goodwill		$ 26,681
Fair value of other intangible assets		$ 4,409
Maximum shares exchanged for stock		80.00%
Maximum shares exchanged for cash		20.00%
National Bancshares Corporation | Core Deposits
Business Acquisition [Line Items]
Fair value of other intangible assets		$ 4,400