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Business Combinations (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Aug. 15, 2017 | Jul. 31, 2017 | Jun. 01, 2016 | Aug. 11, 2017 | Mar. 31, 2018 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  |  |  | $ 38,201 | $ 38,201
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 |  |  |  |  |
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 |  |  |  |  |
Monitor Bancorp, Inc. | Core Deposits |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Fair value of other intangible assets | $ 673 |  |  |  |  |
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 |  |  |
Goodwill |  |  | 1,849 |  |  |
Fair value of other intangible assets |  |  | 1,630 |  |  |
Contingent future payments |  |  | 1,200 |  |  |
Contingent consideration |  | $ 316 | $ 880 |  |  |
Contingent consideration future payment liability |  |  |  |  |  | 200
Reduction to acquisition related costs |  |  |  |  |  | $ 364
Bowers Insurance Agency, Inc. | Earnout Payment |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Contingent consideration |  | $ 564 |  |  |  |

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