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Portfolio Loans Not Covered by Loss Share ("Non-covered") - Summary of Aging of Recorded Investment in Past Due Non-covered Loans by Portfolio Class and Category (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Financing Receivable, Recorded Investment, Past Due [Line Items] | ||
| Total | $ 2,110,825 | $ 2,106,039 |
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Non-Covered Loans
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| Financing Receivable, Recorded Investment, Past Due [Line Items] | ||
| 30-89 Days Past Due | 1,915 | 3,217 |
| 90 or More Days Past Due | 10,899 | 8,278 |
| Total Past Due | 12,814 | 11,495 |
| Current | 2,098,011 | 2,094,544 |
| Total | 2,109,943 | 2,106,028 |
| Total | 2,110,825 | 2,106,039 |
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Non-Covered Loans | Commercial & Industrial
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||
| Financing Receivable, Recorded Investment, Past Due [Line Items] | ||
| 30-89 Days Past Due | 445 | 14 |
| 90 or More Days Past Due | 1,337 | 0 |
| Total Past Due | 1,782 | 14 |
| Current | 1,005,616 | 962,870 |
| Total | 1,007,398 | 962,884 |
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Non-Covered Loans | Commercial Real Estate Owner Occupied
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| Financing Receivable, Recorded Investment, Past Due [Line Items] | ||
| 30-89 Days Past Due | 442 | 1,352 |
| 90 or More Days Past Due | 190 | 2,081 |
| Total Past Due | 632 | 3,433 |
| Current | 350,021 | 329,809 |
| Total | 350,653 | 333,242 |
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Non-Covered Loans | Commercial Real Estate Investor Owned
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| Financing Receivable, Recorded Investment, Past Due [Line Items] | ||
| 30-89 Days Past Due | 1,025 | 0 |
| 90 or More Days Past Due | 6,842 | 4,045 |
| Total Past Due | 7,867 | 4,045 |
| Current | 443,235 | 482,422 |
| Total | 451,102 | 486,467 |
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Non-Covered Loans | Construction and Land Development
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| Financing Receivable, Recorded Investment, Past Due [Line Items] | ||
| 30-89 Days Past Due | 0 | 1,201 |
| 90 or More Days Past Due | 2,210 | 1,559 |
| Total Past Due | 2,210 | 2,760 |
| Current | 112,398 | 158,151 |
| Total | 114,608 | 160,911 |
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Non-Covered Loans | Residential Real Estate
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| Financing Receivable, Recorded Investment, Past Due [Line Items] | ||
| 30-89 Days Past Due | 0 | 616 |
| 90 or More Days Past Due | 320 | 593 |
| Total Past Due | 320 | 1,209 |
| Current | 150,000 | 144,349 |
| Total | 150,320 | 145,558 |
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Non-Covered Loans | Consumer & Other
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| Financing Receivable, Recorded Investment, Past Due [Line Items] | ||
| 30-89 Days Past Due | 3 | 34 |
| 90 or More Days Past Due | 0 | 0 |
| Total Past Due | 3 | 34 |
| Current | 36,741 | 16,943 |
| Total | 35,862 | 16,966 |
| Total | $ 36,744 | $ 16,977 |