Loans, Acquired Loans Acquired In Accordance With FASB 310-30 (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Apr. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jan. 24, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Interest component of expected cash flows (accretable discount)	$ 1,654		$ 2,674	$ 2,898		$ 1,107
BNB Bancorp, Inc [Member]
Business Acquisition [Line Items]
Contractually required principal at acquisition		$ 3,511
Contractual cash flows not expected to be collected (nonaccretable difference)		(404)
Expected cash flows at acquisition		3,107
Interest component of expected cash flows (accretable discount)		(413)
Fair value of acquired impaired loans		$ 2,694
Eaton National Bank [Member]
Business Acquisition [Line Items]
Contractually required principal at acquisition					$ 23,414
Contractual cash flows not expected to be collected (nonaccretable difference)					(6,088)
Expected cash flows at acquisition					17,326
Interest component of expected cash flows (accretable discount)					(2,163)
Fair value of acquired impaired loans					$ 15,163