| **CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (USD $)**                     | Total         | Preferred     | Common Stock | Additional Paid in Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) |
|--------------------------------------------------------------------------------|---------------|---------------|--------------|----------------------------|-------------------|-----------------------------------------------|
| Beginning Balance at Dec. 31, 2009                                             | $ 463,785,000 | $ 112,498,000 | $ 2,653,000  | $ 206,600,000              | $ 150,860,000     | $ (8,826,000)                                 |
| Beginning Balance (in shares) at Dec. 31, 2009                                 |          | 116,125       | 21,227,741   |                       |              |                                          |
| **Comprehensive Income**                                                       |          |          |         |                       |              |                                          |
| Net income                                                                     | 6,909,000     |          |         |                       | 6,909,000         |                                          |
| Other Comprehensive Income, net of tax                                         | (1,331,000)   |          |         |                       |              | (1,331,000)                                   |
| Cash Dividends on Common Stock ($.04 in 2010 and 2011, $.10 in 2012 per Share) | (989,000)     |          |         |                       | (989,000)         |                                          |
| Cash Dividends on Preferred Stock                                              | (5,366,000)   |          |         |                       | (5,366,000)       |                                          |
| Cumulative Preferred Stock Converted to Trust Preferred Securities (shares)    |          | (46,400)      |         |                       |              |                                          |
| Cumulative Preferred Stock Converted to Trust Preferred Securities             | (46,400,000)  | (46,400,000)  |         |                       |              |                                          |
| Gain on exchange of preferred stock for trust preferred debt                   | 11,353,000    |          |         |                       | 11,353,000        |                                          |
| Tax Benefit (Loss) from Stock Options Exercised                                | (50,000)      |          |         | (50,000)                   |              |                                          |
| Accretion of Discount on Preferred Stock                                       |          | 606,000       |         |                       | (606,000)         |                                          |
| Loss on Capital Purchase Program Unamortized Discount                          | (1,301,000)   | 1,301,000     |         |                       | (1,301,000)       |                                          |
| Private Stock Issuance (shares)                                                |          |          | 4,200,000    |                       |              |                                          |
| Private Stock Issuance                                                         | 24,150,000    |          | 525,000      | 23,625,000                 |              |                                          |
| Share-based Compensation (in shares)                                           |          |          | 49,833       |                       |              |                                          |
| Share-based Compensation                                                       | 1,750,000     |          | 6,000        | 1,744,000                  |              |                                          |
| Stock Issued Under Employee Benefit Plans (in shares)                          |          |          | 97,966       |                       |              |                                          |
| Stock Issued Under Employee Benefit Plans                                      | 582,000       |          | 12,000       | 570,000                    |              |                                          |
| Stock Issued Under Dividend Reinvestment and Stock Purchase Plan (in shares)   |          |          | 11,545       |                       |              |                                          |
| Stock Issued Under Dividend Reinvestment and Stock Purchase Plan               | 91,000        |          | 2,000        | 89,000                     |              |                                          |
| Stock Redeemed (in shares)                                                     |          |          | (12,834)     |                       |              |                                          |
| Stock Redeemed                                                                 | (76,000)      |          | (1,000)      | (75,000)                   |              |                                          |
| Ending Balance at Dec. 31, 2010                                                | 454,408,000   | 68,005,000    | 3,197,000    | 232,503,000                | 160,860,000       | (10,157,000)                                  |
| Ending Balance (in shares) at Dec. 31, 2010                                    |          | 69,725        | 25,574,251   |                       |              |                                          |
| **Comprehensive Income**                                                       |          |          |         |                       |              |                                          |
| Net income                                                                     | 25,252,000    |          |         |                       | 25,252,000        |                                          |
| Other Comprehensive Income, net of tax                                         | 6,555,000     |          |         |                       |              | 6,555,000                                     |
| Cash Dividends on Common Stock ($.04 in 2010 and 2011, $.10 in 2012 per Share) | (1,067,000)   |          |         |                       | (1,067,000)       |                                          |
| Cash Dividends on Preferred Stock                                              | (3,662,000)   |          |         |                       | (3,662,000)       |                                          |
| Accretion of Discount on Preferred Stock                                       |          | 319,000       |         |                       | (319,000)         |                                          |
| Loss on Capital Purchase Program Unamortized Discount                          | (1,401,000)   | 1,401,000     |         |                       | (1,401,000)       |                                          |
| Repurchase of Capital Purchase Program Warrants                                | (368,000)     |          |         | (368,000)                  |              |                                          |
| Loss on extinguishment of trust preferred securities                           | (10,857,000)  |          |         |                       | (10,857,000)      |                                          |
| Equity Adjustment Related to First Merchant Reinsurance Co. LTD                | (89,000)      |          |         |                       | (89,000)          |                                          |
| Preferred Stock Redeemed under Capital Purchase Program (in shares)            |          | (69,600)      |         |                       |              |                                          |
| Preferred Stock Redeemed under Capital Purchase Program                        | (69,600,000)  | (69,600,000)  |         |                       |              |                                          |
| Preferred Stock issued under the Small Business Lending Fund (shares)          |          | 90,783        |         |                       |              |                                          |
| Preferred Stock issued under the Small Business Lending Fund                   | 90,783,000    | 90,783,000    |         |                       |              |                                          |
| Private Stock Issuance (shares)                                                |          |          | 2,822,000    |                       |              |                                          |
| Private Stock Issuance                                                         | 21,165,000    |          | 353,000      | 20,812,000                 |              |                                          |
| Share-based Compensation (in shares)                                           |          |          | 72,824       |                       |              |                                          |
| Share-based Compensation                                                       | 1,315,000     |          | 9,000        | 1,306,000                  |              |                                          |
| Stock Issued Under Employee Benefit Plans (in shares)                          |          |          | 93,797       |                       |              |                                          |
| Stock Issued Under Employee Benefit Plans                                      | 669,000       |          | 12,000       | 657,000                    |              |                                          |
| Stock Issued Under Dividend Reinvestment and Stock Purchase Plan (in shares)   |          |          | 11,073       |                       |              |                                          |
| Stock Issued Under Dividend Reinvestment and Stock Purchase Plan               | 89,000        |          | 1,000        | 88,000                     |              |                                          |
| Stock Redeemed (in shares)                                                     |          |          | (14,238)     |                       |              |                                          |
| Stock Redeemed                                                                 | (126,000)     |          | (2,000)      | (124,000)                  |              |                                          |
| Ending Balance at Dec. 31, 2011                                                | 514,467,000   |          | 3,570,000    | 254,874,000                | 168,717,000       | (3,602,000)                                   |
| Ending Balance (in shares) at Dec. 31, 2011                                    |          |          | 28,559,707   |                       |              |                                          |
| **Comprehensive Income**                                                       |          |          |         |                       |              |                                          |
| Net income                                                                     | 45,122,000    |          |         |                       | 45,122,000        |                                          |
| Other Comprehensive Income, net of tax                                         | (1,897,000)   |          |         |                       |              | (1,897,000)                                   |
| Cash Dividends on Common Stock ($.04 in 2010 and 2011, $.10 in 2012 per Share) | (2,903,000)   |          |         |                       | (2,903,000)       |                                          |
| Cash Dividends on Preferred Stock                                              | (4,539,000)   |          |         |                       | (4,539,000)       |                                          |
| Share-based Compensation (in shares)                                           |          |          | 86,325       |                       |              |                                          |
| Share-based Compensation                                                       | 1,492,000     |          | 11,000       | 1,481,000                  |              |                                          |
| Stock Issued Under Employee Benefit Plans (in shares)                          |          |          | 41,867       |                       |              |                                          |
| Stock Issued Under Employee Benefit Plans                                      | 449,000       |          | 5,000        | 444,000                    |              |                                          |
| Stock Issued Under Dividend Reinvestment and Stock Purchase Plan (in shares)   |          |          | 15,709       |                       |              |                                          |
| Stock Issued Under Dividend Reinvestment and Stock Purchase Plan               | 202,000       |          | 2,000        | 200,000                    |              |                                          |
| Stock Options Exercised (in shares)                                            | 10,500        |          | 10,500       |                       |              |                                          |
| Stock Options Exercised                                                        | 78,000        |          | 1,000        | 77,000                     |              |                                          |
| Stock Redeemed (in shares)                                                     |          |          | (21,492)     |                       |              |                                          |
| Stock Redeemed                                                                 | (235,000)     |          | (2,000)      | (233,000)                  |              |                                          |
| Ending Balance at Dec. 31, 2012                                                | $ 552,236,000 | $ 90,908,000  | $ 3,587,000  | $ 256,843,000              | $ 206,397,000     | $ (5,499,000)                                 |
| Ending Balance (in shares) at Dec. 31, 2012                                    |          | 90,908        | 28,692,616   |                       |              |                                          |

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Loss on CPP unamortized discount.
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Represents increases or decreases in additional paid in capital not separately disclosed.
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| - Definition
Tax benefit associated with any equity-based compensation plan other than an employee stock ownership plan (ESOP). The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. Includes any resulting tax benefit that exceeds the previously recognized deferred tax asset (excess tax benefits).
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| - Definition
Equity impact of common stock cash dividends declared by an entity during the period. This element includes paid and unpaid dividends declared during the period.
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Equity impact of preferred stock cash dividends declared by an entity during the period. This element includes paid and unpaid dividends declared during the period.
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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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Net of tax amount of other comprehensive income (loss) attributable to both parent entity and noncontrolling interest.
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The amount of accretion of the preferred stock redemption discount during the period.
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Number of shares issued and outstanding as of the balance sheet date.
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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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Number of shares issued during the period to an employee benefit plan, such as a defined contribution or defined benefit plan.
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No definition available.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of new stock issued during the period.
+ References
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| - Definition
Number of shares of stock issued during the period that is attributable to transactions involving issuance of stock not separately disclosed.
+ References
No definition available.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of share options (or share units) exercised during the current period.
+ References
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| - Definition
Value of shares issued during the period to an employee benefit plan, such as a defined contribution or defined benefit plan.
+ References
No definition available.
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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.
+ References
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| - Definition
Value of shares of stock issued during the period that is attributable to transactions involving issuance of stock not separately disclosed.
+ References
No definition available.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Value of stock issued as a result of the exercise of stock options.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of stock bought back by the entity at the exercise price or redemption price.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Equity impact of the value of stock bought back by the entity at the exercise price or redemption price.
+ References
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