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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, 2007 | Jun. 30, 2017 | Dec. 31, 2016
Business Acquisition [Line Items] |  |  |  |
Business Acquisition, Share Price | $ 16.68 |  |  |
Business Acquisition, shares exchanged | 431,605,000 |  |  |
Common Stock, Par or Stated Value Per Share |  |  | $ 0.10 | $ 0.10
Loans and Leases Receivable, Net Reported Amount |  |  | $ 727,607 | $ 707,426
Loans Receivable, Fair Value Disclosure |  |  | 731,573 | 716,661
Goodwill | $ 1,616 |  | 11,331 | $ 11,331
Finite-Lived Intangible Assets, Gross |  |  | 449 |
Finite-Lived Intangible Assets, Accumulated Amortization |  |  | 75 |
Delaware Bancshares, Inc. Acquisition [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired | $ 3,860 |  |  |
Business Acquisition, Share Price | $ 16.68 |  |  |
Business Acquisition, shares exchanged | 0.6221 |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | 431,605 |  |  |
Credit impaired loans acquired subject to a non-accretable difference | $ 1,410 |  |  |
Non-accretable difference for credit impaired loans acquired | $ 260 |  |  |
Loans and Leases Receivable, Net Reported Amount |  |  | 111,307 |
Loans Receivable, Fair Value Disclosure |  |  | 109,693 |
Goodwill |  |  | 1,616 |
Goodwill, Impairment Loss |  |  | $ 0 |
Delaware Bancshares, Inc. Acquisition [Member] | Delaware Bancshares, Inc. [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
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% |

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