| **Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $)**         | Total         | Preferred stock [Member] | Common stock and additional paid-in capital [Member] | Retained earnings [Member] | Accumulated other comprehensive income [Member] |
|--------------------------------------------------------------------------------------------|---------------|--------------------------|------------------------------------------------------|----------------------------|-------------------------------------------------|
| Balance, beginning balance at Dec. 31, 2012                                                | $ 156,323,000 | $ 12,402,000             | $ 46,412,000                                         | $ 89,692,000               | $ 7,817,000                                     |
| Balance, beginning period (in shares) at Dec. 31, 2012                                     |          |                     | 9,859,914                                            |                       |                                            |
| **Increase (Decrease) in Stockholders' Equity [Roll Forward]**                             |          |                     |                                                 |                       |                                            |
| Net income                                                                                 | 6,098,000     |                     |                                                 | 6,098,000                  |                                            |
| Net unrealized loss on securities available for sale, net of tax                           | (11,373,000)  |                     |                                                 |                       | (11,373,000)                                    |
| Amortization of unrecognized transition obligation for postretirement benefits, net of tax | 8,000         |                     |                                                 |                       | 8,000                                           |
| Comprehensive income                                                                       | (5,267,000)   |                     |                                                 | 6,098,000                  | (11,365,000)                                    |
| Dividends, Preferred Stock                                                                 | (247,000)     |                     |                                                 | (247,000)                  |                                            |
| Dividends, Common Stock, Cash                                                              | (4,195,000)   |                     |                                                 | (4,195,000)                |                                            |
| Equity compensation expense                                                                | 107,000       |                     | 107,000                                              |                       |                                            |
| Amortization of premium for preferred stock issuance                                       |          | 98,000                   | (98,000)                                             |                       |                                            |
| Payment to repurchase preferred stock                                                      | (12,500,000)  | (12,500,000)             |                                                 |                       |                                            |
| Proceeds from sale of common stock (in shares)                                             |          |                     | 799,850                                              |                       |                                            |
| Proceeds from sale of common stock                                                         | 11,751,000    |                     | 11,751,000                                           |                       |                                            |
| Balance, ending period at Jun. 30, 2013                                                    | 145,972,000   | 0                        | 58,172,000                                           | 91,348,000                 | (3,548,000)                                     |
| Balance, ending balance (in shares) at Jun. 30, 2013                                       | 10,659,764    |                     | 10,659,764                                           |                       |                                            |
| Balance, beginning balance at Dec. 31, 2013                                                | 146,098,000   | 0                        | 58,501,000                                           | 94,000,000                 | (6,403,000)                                     |
| Balance, beginning period (in shares) at Dec. 31, 2013                                     | 10,671,192    |                     | 10,671,192                                           |                       |                                            |
| **Increase (Decrease) in Stockholders' Equity [Roll Forward]**                             |          |                     |                                                 |                       |                                            |
| Net income                                                                                 | 7,175,000     |                     |                                                 | 7,175,000                  |                                            |
| Net unrealized loss on securities available for sale, net of tax                           | 8,137,000     |                     |                                                 |                       | 8,137,000                                       |
| Comprehensive income                                                                       | 15,312,000    |                     |                                                 | 7,175,000                  | 8,137,000                                       |
| Dividends, Common Stock, Cash                                                              | (4,390,000)   |                     |                                                 | (4,390,000)                |                                            |
| Equity compensation expense                                                                | 205,000       |                     | 205,000                                              |                       |                                            |
| Issuance of restricted stock (in shares)                                                   |          |                     | 25,843                                               |                       |                                            |
| Issuance of restricted stock                                                               | 0             |                     | 0                                                    | 0                          |                                            |
| Proceeds from sale of common stock (in shares)                                             |          |                     | 13,638                                               |                       |                                            |
| Proceeds from sale of common stock                                                         | 224,000       |                     | 224,000                                              |                       |                                            |
| Balance, ending period at Jun. 30, 2014                                                    | $ 157,449,000 | $ 0                      | $ 58,930,000                                         | $ 96,785,000               | $ 1,734,000                                     |
| Balance, ending balance (in shares) at Jun. 30, 2014                                       | 10,710,673    |                     | 10,710,673                                           |                       |                                            |

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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of decrease (increase) in additional paid in capital (APIC) for the increase in carrying amount of redeemable preferred stock.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.
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| - Definition
Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount after tax and reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of new stock issued during the period.
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| - Definition
Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.
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| - Definition
Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.
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| - Definition
Aggregate value of stock related to Restricted Stock Awards issued during the period.
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| - Definition
Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.
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