| **CommunityOne Bancrop (Parent Company) (Details) (USD $)In Thousands, unless otherwise specified** | 12 Months Ended |           |
|-----------------------------------------------------------------------------------------------------|-----------------|-----------|
||
| **Assets**                                                                                          |            |      |   |   |
| Other assets                                                                                        | $ 33,551        | $ 26,062  |   |   |
| Total Assets                                                                                        | 1,985,032       | 2,151,565 |   |   |
| **Liabilities and shareholders’ equity**                                                     |            |      |   |   |
| Borrowed funds                                                                                      | 135,248         | 115,030   |   |   |
| Shareholders’ equity                                                                         | 80,361          | 98,445    | 129,015 | (28,837) |
| Total Liabilities and Shareholders' Equity                                                          | 1,985,032       | 2,151,565 |   |   |
| **Condensed Statements of Operations**                                                              |            |      |   |   |
| Noninterest income                                                                                  | 20,414          | 21,958    | 21,970 |   |
| Interest expense                                                                                    | (10,559)        | (16,708)  | (23,576) |   |
| Noninterest expense                                                                                 | (84,481)        | (110,206) | (125,040) |   |
| Loss from continuing operations, before income taxes                                                | (157)           | (41,017)  | (130,877) |   |
| Income tax expense/(benefit)                                                                        | 1,326           | (1,039)   | 641 |   |
| Net loss                                                                                            | (1,483)         | (40,005)  | (137,314) |   |
| Preferred stock gain on retirement, net of accretion, and dividends                                 | 0               | 0         | 44,592 |   |
| Net loss to common shareholders                                                                     | (1,483)         | (40,005)  | (92,722) |   |
| **Cash flows from operating activities**                                                            |            |      |   |   |
| Net loss                                                                                            | (1,483)         | (40,005)  | (137,314) |   |
| **Adjustments to reconcile net income to net cash provided by operating activities:**               |            |      |   |   |
| Net cash (used in)/provided by operating activities                                                 | (4,487)         | (35,961)  | 53,732 |   |
| **Cash flows from investing activities**                                                            |            |      |   |   |
| Net cash (used in) provided by investing activities                                                 | (23,080)        | (63,917)  | 427,498 |   |
| **Cash flows from financing activities**                                                            |            |      |   |   |
| Issuance of common stock, net of expense                                                            | 0               | 6,694     | 289,571 |   |
| Net cash used in financing activities                                                               | (144,613)       | (213,928) | (88,408) |   |
| Net (Decrease) Increase in Cash and Cash Equivalents                                                | (172,180)       | (313,806) | 392,822 |   |
| Parent Company [Member]                                                                             |            |      |   |   |
| **Assets**                                                                                          |            |      |   |   |
| Cash                                                                                                | 637             | 606       | 2,808 |   |
| Investment in subsidiaries                                                                          | 143,683         | 161,007   |   |   |
| Other assets                                                                                        | 505             | 81        |   |   |
| Total Assets                                                                                        | 144,825         | 161,694   |   |   |
| **Liabilities and shareholders’ equity**                                                     |            |      |   |   |
| Accrued liabilities                                                                                 | 7,762           | 6,547     |   |   |
| Borrowed funds                                                                                      | 56,702          | 56,702    |   |   |
| Shareholders’ equity                                                                         | 80,361          | 98,445    |   |   |
| Total Liabilities and Shareholders' Equity                                                          | 144,825         | 161,694   |   |   |
| **Condensed Statements of Operations**                                                              |            |      |   |   |
| Noninterest income                                                                                  | 31              | 34        | 32 |   |
| Interest expense                                                                                    | (1,092)         | (1,157)   | (1,072) |   |
| Noninterest expense                                                                                 | (742)           | (970)     | (3,351) |   |
| Loss from continuing operations, before income taxes                                                | (1,803)         | (2,093)   | (4,391) |   |
| Income tax expense/(benefit)                                                                        | 0               | (311)     | 723 |   |
| Loss before equity in undistributed net loss of subsidiaries                                        | (1,803)         | (1,782)   | (5,114) |   |
| Equity in undistributed net loss of subsidiaries                                                    | (320)           | 38,223    | 132,200 |   |
| Net loss                                                                                            | (1,483)         | (40,005)  | (137,314) |   |
| Preferred stock gain on retirement, net of accretion, and dividends                                 | 0               | 0         | 44,592 |   |
| Net loss to common shareholders                                                                     | (1,483)         | (40,005)  | (92,722) |   |
| **Cash flows from operating activities**                                                            |            |      |   |   |
| Net loss                                                                                            | (1,483)         | (40,005)  | (137,314) |   |
| **Adjustments to reconcile net income to net cash provided by operating activities:**               |            |      |   |   |
| Equity in undistributed net loss of subsidiaries                                                    | (320)           | 38,223    | 132,200 |   |
| Other, net                                                                                          | 1,153           | 503       | 6,638 |   |
| Net cash (used in)/provided by operating activities                                                 | (650)           | (1,279)   | 1,524 |   |
| **Cash flows from investing activities**                                                            |            |      |   |   |
| Downstream cash investment in subsidiary                                                            | 0               | (6,709)   | (287,711) |   |
| Net cash (used in) provided by investing activities                                                 | 0               | (6,709)   | (287,711) |   |
| **Cash flows from financing activities**                                                            |            |      |   |   |
| Issuance of common stock, net of expense                                                            |       | 6,694     | 289,571 |   |
| Cash dividends paid on preferred stock                                                              | 0               | 0         | (756) |   |
| Other                                                                                               | 681             | (908)     | 0 |   |
| Net cash used in financing activities                                                               | 681             | 5,786     | 288,815 |   |
| Net (Decrease) Increase in Cash and Cash Equivalents                                                | 31              | (2,202)   | 2,628 |   |
| Cash at beginning of period                                                                         | 606             | 2,808     | 180 |   |
| Cash at end of period                                                                               | $ 637           | $ 606     | $ 2,808 |   |

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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Income (Loss) from Continuing Operations before Income (Loss) from Subsidiaries, Equity Method Investments, Extraordinary Items, Noncontrolling Interest
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Increase (Decrease) in Cash Investment in Subsidiaries
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Investments in Subsidiaries
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The cash inflow from the additional capital contribution to the entity, net of stock issuance costs.
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| - Definition
Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities.
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| - Definition
Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.
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| - Definition
Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.
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| - Definition
Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.
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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.
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Amount after tax of income (loss) of subsidiary attributable to the parent entity.
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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
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| - Definition
Amount of the cost of borrowed funds accounted for as interest expense.
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Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.
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| - Definition
Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.
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| - Definition
Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.
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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.
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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.
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| - Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
+ References
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| - Definition
Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Total aggregate amount of all noninterest expense.
+ References
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| - Definition
The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.
+ References
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| - Definition
The aggregate carrying amounts, as of the balance sheet date, of assets not separately disclosed in the balance sheet.
+ References
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| - Definition
Other cash or noncash adjustments to reconcile net income to cash provided by (used in) operating activities that are not separately disclosed in the statement of cash flows (for example,  cash received or cash paid during the current period for miscellaneous operating activities, net change during the reporting period in other assets or other liabilities).
+ References
No definition available.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash outflow in the form of ordinary dividends to preferred shareholders of the parent entity.
+ References
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| - Definition
The amount of preferred stock dividends that is an adjustment to net income apportioned to common stockholders.
+ References
No definition available.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.
+ References
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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.
+ References
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