Business Acquisitions (Details Textual) - USD ($)				3 Months Ended		6 Months Ended
	Jun. 23, 2015	Jun. 19, 2015	Jul. 01, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill				$ 32,272,000		$ 32,272,000		$ 5,591,000
Business acquisition additional transaction expenses				1,912,000	$ 0	$ 2,157,000	$ 0
Tri-State 1st Banc Incorporation
Business Acquisition [Line Items]
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%
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 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
Shares of stock issued for acquisition		7,262,955
Fair value of total consideration transferred		$ 74,780,000
Maximum shares exchanged for stock		80.00%
Maximum shares exchanged for cash		20.00%
Goodwill		$ 26,681,000
Fair value of other intangible assets		4,409,000
National Bancshares Corporation | Core Deposits
Business Acquisition [Line Items]
Fair value of other intangible assets		$ 4,400,000
National Associates Incorporated
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition						Jul. 01, 2013
Fair value of total consideration transferred			$ 4,400,000
Time to due date once final contingent consideration amount is determined						5 days
EBITDA measurement start date						Aug. 01, 2014
EBITDA measurement end date						Jul. 31, 2015
Business acquisition additional transaction expenses						$ 849,000
Contingent consideration liability				1,000,000		1,000,000
National Associates Incorporated | Maximum
Business Acquisition [Line Items]
Contingent future payments				$ 1,500,000		$ 1,500,000