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Allowance for Probable Loan Losses (Details 3) (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Loan loss allowances, financing receivable past due |  |  |
Non-accrual loans, total | $ 62,823,000 | $ 71,768,000 | $ 118,505,000
Reduced interest income on non-accrual loans | 4,088,000 | 2,549,000 | 4,114,000
Accruing loans contractually past due 90 days or more as to principal or interest payments | 7,197,000 | 15,033,000 | 14,288,000
Commercial |  |  |
Loan loss allowances, financing receivable past due |  |  |
Non-accrual loans, total | 34,110,000 | 31,929,000 |
Accruing loans contractually past due 90 days or more as to principal or interest payments | 2,051,000 | 2,689,000 |
Commercial real estate: other construction and land development |  |  |
Loan loss allowances, financing receivable past due |  |  |
Non-accrual loans, total | 11,726,000 | 26,410,000 |
Accruing loans contractually past due 90 days or more as to principal or interest payments | 62,000 | 497,000 |
Commercial real estate: farmland and commercial |  |  |
Loan loss allowances, financing receivable past due |  |  |
Non-accrual loans, total | 13,775,000 | 11,681,000 |
Accruing loans contractually past due 90 days or more as to principal or interest payments | 417,000 | 929,000 |
Commercial real estate: multifamily |  |  |
Loan loss allowances, financing receivable past due |  |  |
Non-accrual loans, total | 295,000 | 353,000 |
Residential: first lien |  |  |
Loan loss allowances, financing receivable past due |  |  |
Non-accrual loans, total | 1,266,000 | 1,175,000 |
Accruing loans contractually past due 90 days or more as to principal or interest payments | 3,518,000 | 9,657,000 |
Residential: junior lien |  |  |
Loan loss allowances, financing receivable past due |  |  |
Non-accrual loans, total | 1,576,000 | 175,000 |
Accruing loans contractually past due 90 days or more as to principal or interest payments | 368,000 | 115,000 |
Consumer |  |  |
Loan loss allowances, financing receivable past due |  |  |
Non-accrual loans, total | 75,000 | 45,000 |
Accruing loans contractually past due 90 days or more as to principal or interest payments | $ 781,000 | $ 882,000 |

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- Definition Represents the reduction in interest income on recorded investment in financing receivables that are on nonaccrual status. + 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 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5111-111524 + 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 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5111-111524 + Details
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