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Accounting Policies and Other Matters (Details) (USD $) | 3 Months Ended | 6 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2012 | Jun. 30, 2012 Noncovered Loans | Mar. 31, 2012 Noncovered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Maximum period of fair value refinement after transaction closing date |  | 1 year |  |
Adjustments to acquisition gains | $ 0 |  |  |
Threshold amount for individual impairment analysis |  |  | 500,000 | 1,000,000
Impact of change in estimation method on allowance |  |  | $ 2,615,000 |

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- Definition Receivables, Change in Method of Calculating Impairment, Threshold Amount + References No definition available. + Details
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- Details
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