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Allowance for Probable Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Dec. 31, 2011
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Financing receivable recorded investment |  |
Past due 30-59 days | $ 22,682 | $ 48,472
Past due 60-89 days | 38,425 | 19,594
Past due 90 days or greater | 64,902 | 71,614
Past due 90 days or greater and still accruing | 36,367 | 14,288
Past due, total | 126,009 | 139,680
Loans, current | 4,757,019 | 4,913,795
Portfolio, total | 4,883,028 | 5,053,475
Commercial |  |
Financing receivable recorded investment |  |
Past due 30-59 days | 6,497 | 5,180
Past due 60-89 days | 6,764 | 1,369
Past due 90 days or greater | 24,902 | 1,842
Past due 90 days or greater and still accruing | 24,239 | 1,490
Past due, total | 38,163 | 8,391
Loans, current | 778,553 | 765,425
Portfolio, total | 816,716 | 773,816
Commercial real estate: other construction and land development |  |
Financing receivable recorded investment |  |
Past due 30-59 days | 3,855 | 23,426
Past due 60-89 days | 25,458 | 4,360
Past due 90 days or greater | 18,716 | 49,887
Past due 90 days or greater and still accruing | 864 | 979
Past due, total | 48,029 | 77,673
Loans, current | 1,144,244 | 1,195,716
Portfolio, total | 1,192,273 | 1,273,389
Commercial real estate: farmland and commercial |  |
Financing receivable recorded investment |  |
Past due 30-59 days | 3,288 | 9,467
Past due 60-89 days | 2,298 | 10,269
Past due 90 days or greater | 8,486 | 7,879
Past due 90 days or greater and still accruing | 537 | 1,231
Past due, total | 14,072 | 27,615
Loans, current | 1,656,859 | 1,637,072
Portfolio, total | 1,670,931 | 1,664,687
Commercial real estate: multifamily |  |
Financing receivable recorded investment |  |
Past due 30-59 days | 161 | 450
Past due 90 days or greater | 504 | 411
Past due 90 days or greater and still accruing | 137 |
Past due, total | 665 | 861
Loans, current | 96,868 | 120,738
Portfolio, total | 97,533 | 121,599
Residential: first lien |  |
Financing receivable recorded investment |  |
Past due 30-59 days | 3,754 | 6,207
Past due 60-89 days | 2,272 | 2,757
Past due 90 days or greater | 10,892 | 10,295
Past due 90 days or greater and still accruing | 9,470 | 9,382
Past due, total | 16,918 | 19,259
Loans, current | 434,390 | 476,463
Portfolio, total | 451,308 | 495,722
Residential: junior lien |  |
Financing receivable recorded investment |  |
Past due 30-59 days | 1,007 | 1,433
Past due 60-89 days | 354 | 378
Past due 90 days or greater | 442 | 368
Past due 90 days or greater and still accruing | 223 | 320
Past due, total | 1,803 | 2,179
Loans, current | 380,028 | 397,969
Portfolio, total | 381,831 | 400,148
Consumer |  |
Financing receivable recorded investment |  |
Past due 30-59 days | 1,926 | 1,643
Past due 60-89 days | 348 | 408
Past due 90 days or greater | 809 | 912
Past due 90 days or greater and still accruing | 793 | 866
Past due, total | 3,083 | 2,963
Loans, current | 76,371 | 91,146
Portfolio, total | 79,454 | 94,109
Foreign |  |
Financing receivable recorded investment |  |
Past due 30-59 days | 2,194 | 666
Past due 60-89 days | 931 | 53
Past due 90 days or greater | 151 | 20
Past due 90 days or greater and still accruing | 104 | 20
Past due, total | 3,276 | 739
Loans, current | 189,706 | 229,266
Portfolio, total | $ 192,982 | $ 230,005

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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 8 -Subparagraph e -Chapter V -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 116 -IssueDate 2006-05-01 -Chapter 8 -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 3: 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=7512638&loc=d3e5074-111524 Reference 4: 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 5: 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. + Details
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