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Portfolio Loans Covered by Loss Share (Covered loans) - Summary of Activity in the FDIC Loss Share Receivable (Details) (USD $)
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3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2013
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Sep. 30, 2013
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Sep. 30, 2012
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Dec. 31, 2012
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| PORTFOLIO LOANS COVERED BY LOSS SHARE [Abstract] | ||||
| FDIC loss share receivable | $ 40,054,000 | $ 40,054,000 | $ 61,475,000 | |
| Net cash proceeds received from FDIC loss share receivable | 9,654,000 | 85,173,000 | ||
| FDIC Indemnification Asset, Period Increase (Decrease) | 1,880,000 | |||
| FDIC Indemnification Asset, Accretion of Discount | (9,574,000) | |||
| Loan impairment recapture | 2,205,000 | |||
| Reductions for payments on Covered assets in excess of expected cash flows | (6,278,000) | |||
| Amount of Estimated Clawback Liability | 1,400,000 | 1,400,000 | ||
| Adjustment in FDIC clawback liability | $ 62,000 | |||