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Allowance for Noncovered Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Analysis of Credit Quality of Noncovered Loan Portfolio) (Details) (Noncovered Loans [Member], USD $) In Thousands, unless otherwise specified
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12 Months Ended |
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Dec. 31, 2011
risk_rating
|
Dec. 31, 2010
risk_rating
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Recorded Investment Noncovered Loans |
|
$ 1,927,191 |
| Total noncovered loans, net of unearned income |
2,348,371 |
1,915,754 |
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Commercial Portfolio Segment [Member] | Secured Loans [Member]
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|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted-Average Risk Rating |
4.89 |
4.96 |
| Recorded Investment Noncovered Loans |
|
757,372 |
| Total noncovered loans, net of unearned income |
981,417 |
|
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Commercial Portfolio Segment [Member] | Unsecured Loans [Member]
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|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted-Average Risk Rating |
4.25 |
4.23 |
| Recorded Investment Noncovered Loans |
|
41,175 |
| Total noncovered loans, net of unearned income |
47,406 |
|
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Real Estate Portfolio Segment [Member] | One-to-Four Family Residential [Member]
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|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted-Average Risk Rating |
4.81 |
4.96 |
| Recorded Investment Noncovered Loans |
|
49,436 |
| Total noncovered loans, net of unearned income |
64,063 |
|
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Real Estate Portfolio Segment [Member] | Commercial Land [Member]
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|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted-Average Risk Rating |
5.22 |
5.75 |
| Recorded Investment Noncovered Loans |
|
24,956 |
| Total noncovered loans, net of unearned income |
50,681 |
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Real Estate Portfolio Segment [Member] | Income Property Multifamily [Member]
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|
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| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted-Average Risk Rating |
4.94 |
5.07 |
| Recorded Investment Noncovered Loans |
|
406,711 |
| Total noncovered loans, net of unearned income |
533,993 |
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Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
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|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted-Average Risk Rating |
5.05 |
5.12 |
| Recorded Investment Noncovered Loans |
|
366,284 |
| Total noncovered loans, net of unearned income |
404,789 |
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Real Estate Construction Portfolio Segment [Member] | Income Property Multifamily [Member]
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|
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| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted-Average Risk Rating |
5.49 |
6.38 |
| Recorded Investment Noncovered Loans |
|
18,296 |
| Total noncovered loans, net of unearned income |
20,877 |
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Real Estate Construction Portfolio Segment [Member] | Owner Occupied [Member]
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|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted-Average Risk Rating |
4.55 |
4.93 |
| Recorded Investment Noncovered Loans |
|
11,990 |
| Total noncovered loans, net of unearned income |
12,790 |
|
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Real Estate Construction Portfolio Segment [Member] | Land And Acquisition [Member]
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|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted-Average Risk Rating |
6.43 |
6.79 |
| Recorded Investment Noncovered Loans |
|
37,054 |
| Total noncovered loans, net of unearned income |
25,201 |
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Real Estate Construction Portfolio Segment [Member] | Residential Construction [Member]
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|
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| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted-Average Risk Rating |
5.94 |
6.63 |
| Recorded Investment Noncovered Loans |
|
31,293 |
| Total noncovered loans, net of unearned income |
23,931 |
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Consumer Portfolio Segment [Member]
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|
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| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted-Average Risk Rating |
4.24 |
4.31 |
| Recorded Investment Noncovered Loans |
|
182,624 |
| Total noncovered loans, net of unearned income |
$ 183,223 |
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