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Acquisition of Delaware Bancshares, Inc. (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 6 Months Ended |
--- | --- | --- | --- | ---
Jul. 31, 2016 | Oct. 31, 2010 | Jun. 30, 2016 | Dec. 31, 2015
Business Acquisition [Line Items] |  |  |  |
Assets |  |  | $ 767,829 | $ 750,505
Deposits, total |  |  | 584,259 | 550,909
Stockholders' equity |  |  | 104,591 | $ 100,998
Delaware Bancshares, Inc. Acquisition [Member] | Delaware Bancshares, Inc. [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Assets |  |  | 378,300 |
Deposits, total |  |  | 327,500 |
Stockholders' equity |  |  | $ 24,100 |
Proceeds from Issuance of Trust Preferred Securities |  | $ 8,000 |  |
Delaware Bancshares, Inc. Acquisition [Member] | Delaware Bancshares, Inc. [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 2.40% |
Delaware Bancshares, Inc. Acquisition [Member] | Subsequent Event [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired | $ 3,859 |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | 431,605 |  |  |
Business Acquisition, Share Price | $ 16.68 |  |  |
Business Acquisition, shares exchanged | 0.6221 |  |  |

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