| **Acquisitions and Intangible Assets (Details) (USD $)**             | 12 Months Ended |              |
|----------------------------------------------------------------------|-----------------|--------------|
||
| Bank Acquisitions From Camden National Bank [Member]                 |            |         |
| **Business Acquisition [Line Items]**                                |            |         |
| Deposit liabilities assumed in acquisition                           |            | $ 32,300,000 |
| **Assets [Abstract]**                                                |            |         |
| Cash                                                                 |            | 25,297,000   |
| Loans                                                                |            | 224,000      |
| Bank premises and equipment                                          |            | 3,776,000    |
| Accrued interest receivable and other assets                         |            | 24,000       |
| Core deposit intangible                                              |            | 432,000      |
| Goodwill                                                             |            | 2,121,000    |
| **Liabilities [Abstract]**                                           |            |         |
| Deposits                                                             |            | 31,858,000   |
| Accrued interest and other liabilities                               |            | 16,000       |
| Business combination purchase premium                                |            | 2,553,000    |
| **Future amortization expense of core deposits acquired [Abstract]** |            |         |
| 2013                                                                 | 43,000          |         |
| 2014                                                                 | 43,000          |         |
| 2015                                                                 | 43,000          |         |
| 2016                                                                 | 43,000          |         |
| 2017                                                                 | 43,000          |         |
| Thereafter                                                           | 217,000         |         |
| Total                                                                | 432,000         |         |
| One time acquisition costs                                           |            | 251,000      |
| **Pro forma information [Abstract]**                                 |            |         |
| Interest income                                                      | 2,000           |         |
| Interest expense                                                     | 21,000          |         |
| Net interest income                                                  | (19,000)        |         |
| Non-interest income                                                  | 36,000          |         |
| Non-interest expense                                                 | 55,000          |         |
| Loss before taxes                                                    | (38,000)        |         |
| Tax benefit                                                          | (13,000)        |         |
| Net loss                                                             | (25,000)        |         |
| FNB Bankshares [Member]                                              |            |         |
| **Business Acquisition [Line Items]**                                |            |         |
| Total value of transaction                                           | 47,955,000      |         |
| **Assets [Abstract]**                                                |            |         |
| Goodwill                                                             | 27,559,000      |         |
| Acquisition in 2001 [Member]                                         |            |         |
| **Assets [Abstract]**                                                |            |         |
| Goodwill                                                             | $ 125,000       |         |

| X                                                                                                                                                                                                                                                                                                                                                                                                                            |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The pro forma income from continuing operations before the tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.
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The pro forma interest expense for a period as if the business combination or combinations had been completed at the beginning of the period.
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The pro forma interest revenue for a period as if the business combination or combinations had been completed at the beginning of the period.
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The pro forma non-interest expense for a period as if the business combination or combinations had been completed at the beginning of the period.
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The amount of fair value of identifiable accrued interest receivable and other assets, recognized as of the acquisition date.
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The premium paid to acquire an entity.
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| - Definition
The pro forma net amount of operating income (expense) for a period as if the business combination or combinations had been completed at the beginning of the period.
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| - Definition
The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.
+ References
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| - Definition
Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.
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| - Definition
The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.
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| - Definition
The amount of acquisition cost of a business combination allocated to receivables.
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| - Definition
The amount of acquisition cost of a business combination allocated to accrued expenses of the acquired entity.
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| - Definition
The amount of acquisition cost of a business combination allocated to other current liabilities of the acquired entity. Does not include amounts allocated to the current portion of long-term debt, accounts payable and accrued expenses.
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| - Definition
Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.
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| - Definition
The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations.
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| - Definition
The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.
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| - Definition
The aggregate estimated amortization expense for succeeding fiscal years for intangible assets subject to amortization.
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The amount of amortization expense expected to be recognized for the remainder of the finite-lived intangible asset useful life after the fifth succeeding fiscal year.
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The amount of amortization expense expected to be recognized during year five of the five succeeding fiscal years.
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The amount of amortization expense expected to be recognized during year four of the five succeeding fiscal years.
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The amount of amortization expense expected to be recognized during year one of the five succeeding fiscal years.
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The amount of amortization expense expected to be recognized during year three of the five succeeding fiscal years.
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The amount of amortization expense expected to be recognized during year two of the five succeeding fiscal years.
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