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Loans and Related Allowance for Loan Losses (Narrative) (Details) | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2015 USD ($) loan | Mar. 31, 2014 USD ($) loan | Jun. 30, 2015 USD ($) loan | Jun. 30, 2014 USD ($) loan | Mar. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
Commercial amount benchmark minimum for internal annual review |  |  | $ 500,000 |  |  |  |
Commercial amount benchmark minimum for annual review by independent reviewer |  |  | 1,000,000 |  |  |  |
Commercial amount benchmark minimum criticized relationships for annual review by independent reviewer |  |  | 500,000 |  |  |  |
Commerical amount benchmark internal impairment review |  |  | 500,000 |  |  |  |
Commerical amount benchmark internal impairment review minimum relationship amount |  |  | 750,000 |  |  |  |
Commercial amount benchmark to require external appraisal |  |  | 500,000 |  |  |  |
Nonaccrual loans subject to partial charge off | $ 11,882,000 |  | 11,882,000 |  |  | $ 11,551,000 |
Reduction of the ALL resulting |  |  | 4,324 | $ 1,055 |  |  |
Loans in process of foreclosure | 2,100,000 |  | 2,100,000 |  |  | 1,900,000 |
Total allowance for loan losses | 11,809,000 | $ 12,572,000 | 11,809,000 | $ 12,463,000 | $ 11,751,000 | 12,065,000 | $ 13,594,000
Partial Charge Off [Member] |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
Nonaccrual loans subject to partial charge off | 5,000,000 |  | $ 5,000,000 |  |  | 4,600,000 |
New TDR [Member] |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
Financing receivable, modifications, number of contracts | loan |  |  | 7 | 2 |  |  |
Pre Existing TDR Loans Remodified After Maturity [Member] |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
Financing receivable, modifications, number of contracts | loan |  |  | 8 | 5 |  |  |
Acquisition and Development (A&D) TDR [Member] |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
Financing receivable, modifications, number of contracts | loan |  | 1 |  |  |  |  |
Financing receivable, modifications, subsequent default, recorded investment |  | $ 1,400,000 |  |  |  |  |
Unallocated [Member] |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
Total allowance for loan losses | $ 500,000 |  | $ 500,000 |  |  |  |
Residential Mortgage [Member] |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
Financing receivable, modifications, subsequent default, number of contracts | loan | 1 |  |  |  |  |  |
Financing receivable, modifications, subsequent default, recorded investment | $ 70,000 |  |  |  |  |  |
Commercial real estate- non owner-occupied [Member] |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
Nonaccrual loans subject to partial charge off | $ 1,645,000 |  | $ 1,645,000 |  |  | $ 1,152,000 |

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