Business Combinations (Details Textual) - USD ($)					1 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2018	Aug. 15, 2017	Jul. 31, 2017	Jun. 01, 2016	Aug. 11, 2017	Sep. 30, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill						$ 38,201,000	$ 38,201,000
Monitor Bancorp, Inc.
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Aug. 15, 2017
Shares of stock issued for acquisition		465,787
Fair value of total consideration transferred		$ 7,512,000
Maximum shares exchanged for stock		85.00%
Maximum shares exchanged for cash		15.00%
Cash consideration per share		$ 769.38
Multiplier used to calculate per share cash consideration		1.25
Period of trading days considered for volume weighted average closing price					20 days
Volume weighted average closing price per share of common shares		$ 14.04
Final stock exchange ratio		54.80
Goodwill		$ 1,037,000
Monitor Bancorp, Inc. | Core Deposits
Business Acquisition [Line Items]
Fair value of other intangible assets		$ 673,000
Bowers Insurance Agency, Inc.
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition						Jun. 01, 2016
Shares of stock issued for acquisition				123,280
Fair value of total consideration transferred				$ 3,155,000
Goodwill				1,849,000
Fair value of other intangible assets				1,630,000
Contingent future payments				1,200,000
Contingent consideration			$ 316,000	$ 880,000
Contingent consideration future payment liability							200,000
Reduction to acquisition related costs							$ 364,000
Bowers Insurance Agency, Inc. | Earnout Payment
Business Acquisition [Line Items]
Contingent consideration	$ 0		$ 564,000