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Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (3) (Details) (USD $) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2012 | Dec. 31, 2011
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |  |
Past Due 30 - 89 Days | $ 26,163,000 |  | $ 34,265,000 |
Past Due Greater Than 90 Days | 5,699,000 | [1] | 4,230,000 | [1]
Total Past Due | 31,862,000 |  | 38,495,000 |
Nonaccrual | 80,658,000 |  | 110,458,000 |
Current Loans | 5,415,443,000 |  | 5,708,531,000 |
Total LHFI | 5,527,963,000 |  | 5,857,484,000 |
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due | 45,200,000 |  | 43,600,000 |
Covered Serviced Financing Receivable Available for Repurchase, Recorded Investment, Equal to Greater than 90 Days Past Due | 39,500,000 |  | 39,400,000 |
Percentage of Outstanding Principal To Be Repurchased Under GNMA Optional Repurchase Program (in hundredths) | 100.00% |  |  |
Real Estate Secured Financing Receivable [Member] | Construction Land Development And Other Financing Receivable [Member] |  |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |  |
Past Due 30 - 89 Days | 1,762,000 |  | 1,784,000 |
Past Due Greater Than 90 Days | 0 | [1] | 1,657,000 | [1]
Total Past Due | 1,762,000 |  | 3,441,000 |
Nonaccrual | 26,077,000 |  | 40,413,000 |
Current Loans | 432,760,000 |  | 430,228,000 |
Total LHFI | 460,599,000 |  | 474,082,000 |
Real Estate Secured Financing Receivable [Member] | Secured by 1-4 Family Residential Properties[Member] |  |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |  |
Past Due 30 - 89 Days | 12,672,000 |  | 9,755,000 |
Past Due Greater Than 90 Days | 2,843,000 | [1] | 1,306,000 | [1]
Total Past Due | 15,515,000 |  | 11,061,000 |
Nonaccrual | 24,260,000 |  | 24,348,000 |
Current Loans | 1,471,739,000 |  | 1,725,521,000 |
Total LHFI | 1,511,514,000 |  | 1,760,930,000 |
Real Estate Secured Financing Receivable [Member] | Secured by NonFarm, Nonresidential Properties [Member] |  |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |  |
Past Due 30 - 89 Days | 3,364,000 |  | 9,925,000 |
Past Due Greater Than 90 Days | 91,000 | [1] | 0 | [1]
Total Past Due | 3,455,000 |  | 9,925,000 |
Nonaccrual | 18,873,000 |  | 23,981,000 |
Current Loans | 1,375,208,000 |  | 1,391,868,000 |
Total LHFI | 1,397,536,000 |  | 1,425,774,000 |
Real Estate Secured Financing Receivable [Member] | Other Real Estate Secured Financing Receivable [Member] |  |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |  |
Past Due 30 - 89 Days | 184,000 |  | 879,000 |
Past Due Greater Than 90 Days | 0 | [1] | 0 | [1]
Total Past Due | 184,000 |  | 879,000 |
Nonaccrual | 3,900,000 |  | 5,871,000 |
Current Loans | 180,720,000 |  | 198,099,000 |
Total LHFI | 184,804,000 |  | 204,849,000 |
Commercial And Industrial Loans [Member] |  |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |  |
Past Due 30 - 89 Days | 3,861,000 |  | 1,646,000 |
Past Due Greater Than 90 Days | 2,532,000 | [1] | 769,000 | [1]
Total Past Due | 6,393,000 |  | 2,415,000 |
Nonaccrual | 6,215,000 |  | 14,148,000 |
Current Loans | 1,151,073,000 |  | 1,122,802,000 |
Total LHFI | 1,163,681,000 |  | 1,139,365,000 |
Consumer Loans [Member] |  |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |  |
Past Due 30 - 89 Days | 4,246,000 |  | 7,172,000 |
Past Due Greater Than 90 Days | 233,000 | [1] | 498,000 | [1]
Total Past Due | 4,479,000 |  | 7,670,000 |
Nonaccrual | 411,000 |  | 825,000 |
Current Loans | 177,006,000 |  | 235,261,000 |
Total LHFI | 181,896,000 |  | 243,756,000 |
Other Loans [Member] |  |  |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |  |  |
Past Due 30 - 89 Days | 74,000 |  | 3,104,000 |
Past Due Greater Than 90 Days | 0 | [1] | 0 | [1]
Total Past Due | 74,000 |  | 3,104,000 |
Nonaccrual | 922,000 |  | 872,000 |
Current Loans | 626,937,000 |  | 604,752,000 |
Total LHFI | $ 627,933,000 |  | $ 608,728,000 |
[1] | Past due greater than 90 days but still accruing interest.

X
- Definition Covered serviced financing receivables eligible for repurchase that are equal to or greater than 90 days past due. + References No definition available. + Details
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X
- Definition Financing receivables that are less than 90 days past due but more than 29 days past due. + References No definition available. + Details
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- Definition The amount of the outstanding principal of a loan to be repurchased under GNMA Optional repurchase Program for loans in a pool that become delinquent. + References No definition available. + Details
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- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5111-111524 -Subparagraph (d) + Details
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- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953401-111524 + Details
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- Definition Financing receivables that are equal to or greater than 90 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953401-111524 + Details
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5111-111524 -Subparagraph (d) + Details
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- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953401-111524 + Details
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- Definition Reflects the aggregate gross carrying amount of all categories of loans and leases held in portfolio, after deducting deferred income, but before deducting the allowance for losses on loans and leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Chapter 8 -Paragraph 116 -IssueDate 2006-05-01 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 8 -Subparagraph e -Subsection I -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. + Details
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