| **Short-Term Borrowings and Long-Term Debt (FHLB Advances) (Details) (USD $)**     | Dec. 31, 2012 | Dec. 31, 2011 |
|------------------------------------------------------------------------------------|---------------|---------------|
| **Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]**             |          |          |
| FHLB advances                                                                      | $ 58,328,000  | $ 58,370,000  |
| FHLB Advances, interest rate, ranging from                                         | 2.33%         | 2.33%         |
| FHLB Advances, interest rate, ranging to                                           | 6.15%         | 6.15%         |
| **Scheduled Maturities of FHLB Advances**                                          |          |          |
| 2013                                                                               | 0             |          |
| 2014                                                                               | 5,000,000     |          |
| 2015                                                                               | 3,000,000     |          |
| 2016                                                                               | 0             |          |
| 2017                                                                               | 0             |          |
| 2018 and thereafter                                                                | 50,328,000    |          |
| FHLB advances                                                                      | 58,328,000    | 58,370,000    |
| FHLB Advances, Maturing December 29, 2014 [Member]                                 |          |          |
| **Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]**             |          |          |
| FHLB advances                                                                      | 5,000,000     | 5,000,000     |
| **Scheduled Maturities of FHLB Advances**                                          |          |          |
| FHLB advances                                                                      | 5,000,000     | 5,000,000     |
| FHLB Advances, interest rate                                                       | 3.3125%       |          |
| FHLB Advances, Maturing September 8, 2015 [Member]                                 |          |          |
| **Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]**             |          |          |
| FHLB advances                                                                      | 3,000,000     | 3,000,000     |
| **Scheduled Maturities of FHLB Advances**                                          |          |          |
| FHLB advances                                                                      | 3,000,000     | 3,000,000     |
| FHLB Advances, interest rate                                                       | 3.71%         |          |
| FHLB Advances, Maturing March 19, 2018 [Member]                                    |          |          |
| **Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]**             |          |          |
| FHLB advances                                                                      | 10,000,000    | 10,000,000    |
| **Scheduled Maturities of FHLB Advances**                                          |          |          |
| FHLB advances                                                                      | 10,000,000    | 10,000,000    |
| FHLB Advances, interest rate                                                       | 2.81%         |          |
| FHLB Advances, Maturing July 6, 2018 [Member]                                      |          |          |
| **Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]**             |          |          |
| FHLB advances                                                                      | 20,000,000    | 20,000,000    |
| **Scheduled Maturities of FHLB Advances**                                          |          |          |
| FHLB advances                                                                      | 20,000,000    | 20,000,000    |
| FHLB Advances, interest rate                                                       | 2.43%         |          |
| FHLB Advances, Maturing July 18, 2018 [Member]                                     |          |          |
| **Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]**             |          |          |
| FHLB advances                                                                      | 20,000,000    | 20,000,000    |
| **Scheduled Maturities of FHLB Advances**                                          |          |          |
| FHLB advances                                                                      | 20,000,000    | 20,000,000    |
| FHLB Advances, interest rate                                                       | 2.33%         |          |
| FHLB Advances, Maturing August 27, 2018 [Member]                                   |          |          |
| **Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]**             |          |          |
| FHLB advances                                                                      | 328,000       | 370,000       |
| **Scheduled Maturities of FHLB Advances**                                          |          |          |
| FHLB advances                                                                      | 328,000       | 370,000       |
| FHLB Advances, interest rate                                                       | 6.15%         |          |
| CommunityOne [Member]                                                              |          |          |
| **Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]**             |          |          |
| FHLB Advances, available borrowing capacity without pledging additional collateral | 19,100,000    |          |
| FHLB Advances, additional borrowing by pledging additional collateral              | 60,800,000    |          |
| Bank of Granite [Member]                                                           |          |          |
| **Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]**             |          |          |
| FHLB Advances, available borrowing capacity without pledging additional collateral | 0             |          |
| FHLB Advances, additional borrowing by pledging additional collateral              | $ 24,000,000  |          |

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| - Definition
Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds, by Pledging Additional Collateral
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
States the interest rate applicable to Federal Home Loan Bank advances outstanding as of the Balance Sheet date.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
States the lowest interest rate applicable to any of the advances from the Federal Home Loan Bank as of the Balance Sheet date.
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| - Definition
States the highest interest rate applicable to any of the advances from the Federal Home Loan Bank as of the Balance Sheet date.
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| - Definition
Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of federal home loan bank advances maturing after the fifth fiscal year following the latest fiscal year.
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| - Definition
Amount of federal home loan bank advances maturing in the fifth fiscal year following the latest fiscal year.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of federal home loan bank advances maturing in the second fiscal year following the latest fiscal year.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of federal home loan bank advances maturing in the fourth fiscal year following the latest fiscal year.
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| - Definition
Amount of federal home loan bank advances maturing in the third fiscal year following the latest fiscal year.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of federal home loan bank advances maturing in the next fiscal year following the latest fiscal year.
+ References
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