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Allowance for Probable Loan Losses (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Allowance for probable loan losses |  |  |
Balance at the beginning of the period | $ 58,193,000 | $ 84,192,000 |
Losses charged to allowance | (14,455,000) | (58,346,000) |
Recoveries credited to allowance | 3,455,000 | 4,388,000 |
Net losses charged to allowance | (11,000,000) | (53,958,000) |
Provision (credit) charged to operations | 22,968,000 | 27,959,000 | 17,318,000
Balance at the end of the period | 70,161,000 | 58,193,000 | 84,192,000
Commercial |  |  |
Allowance for probable loan losses |  |  |
Balance at the beginning of the period | 11,632,000 | 26,617,000 |
Losses charged to allowance | (11,737,000) | (34,721,000) |
Recoveries credited to allowance | 2,690,000 | 3,547,000 |
Net losses charged to allowance | (9,047,000) | (31,174,000) |
Provision (credit) charged to operations | 19,848,000 | 16,189,000 |
Balance at the end of the period | 22,433,000 | 11,632,000 |
Risks related to family development loans |  |  |
Increase in allowance for probable loan losses due to the addition of a specific reserve | 12,000,000 |  |
Commercial real estate: other construction and land development |  |  |
Allowance for probable loan losses |  |  |
Balance at the beginning of the period | 12,720,000 | 19,940,000 |
Losses charged to allowance | (278,000) | (7,617,000) |
Recoveries credited to allowance | 87,000 | 229,000 |
Net losses charged to allowance | (191,000) | (7,388,000) |
Provision (credit) charged to operations | 12,000 | 168,000 |
Balance at the end of the period | 12,541,000 | 12,720,000 |
Risks related to family development loans |  |  |
Minimum number of family development loans | 1 |  |
Maximum number of family development loans | 4 |  |
Commercial real estate: farmland and commercial |  |  |
Allowance for probable loan losses |  |  |
Balance at the beginning of the period | 21,880,000 | 24,227,000 |
Losses charged to allowance | (600,000) | (13,724,000) |
Recoveries credited to allowance | 152,000 | 220,000 |
Net losses charged to allowance | (448,000) | (13,504,000) |
Provision (credit) charged to operations | 3,035,000 | 11,157,000 |
Balance at the end of the period | 24,467,000 | 21,880,000 |
Commercial real estate: multifamily |  |  |
Allowance for probable loan losses |  |  |
Balance at the beginning of the period | 694,000 | 1,003,000 |
Losses charged to allowance | (5,000) |  |
Net losses charged to allowance | (5,000) |  |
Provision (credit) charged to operations | 87,000 | (309,000) |
Balance at the end of the period | 776,000 | 694,000 |
Residential: first lien |  |  |
Allowance for probable loan losses |  |  |
Balance at the beginning of the period | 4,390,000 | 4,562,000 |
Losses charged to allowance | (632,000) | (227,000) |
Recoveries credited to allowance | 61,000 | 13,000 |
Net losses charged to allowance | (571,000) | (214,000) |
Provision (credit) charged to operations | (7,000) | 42,000 |
Balance at the end of the period | 3,812,000 | 4,390,000 |
Residential: junior lien |  |  |
Allowance for probable loan losses |  |  |
Balance at the beginning of the period | 4,448,000 | 4,760,000 |
Losses charged to allowance | (620,000) | (1,190,000) |
Recoveries credited to allowance | 298,000 | 195,000 |
Net losses charged to allowance | (322,000) | (995,000) |
Provision (credit) charged to operations | 123,000 | 683,000 |
Balance at the end of the period | 4,249,000 | 4,448,000 |
Consumer |  |  |
Allowance for probable loan losses |  |  |
Balance at the beginning of the period | 1,289,000 | 1,724,000 |
Losses charged to allowance | (561,000) | (756,000) |
Recoveries credited to allowance | 162,000 | 184,000 |
Net losses charged to allowance | (399,000) | (572,000) |
Provision (credit) charged to operations | (140,000) | 137,000 |
Balance at the end of the period | 750,000 | 1,289,000 |
Foreign |  |  |
Allowance for probable loan losses |  |  |
Balance at the beginning of the period | 1,140,000 | 1,359,000 |
Losses charged to allowance | (22,000) | (111,000) |
Recoveries credited to allowance | 5,000 |  |
Net losses charged to allowance | (17,000) | (111,000) |
Provision (credit) charged to operations | 10,000 | (108,000) |
Balance at the end of the period | $ 1,133,000 | $ 1,140,000 |
Commercial real estate relationships |  |  |
Risks related to family development loans |  |  |
Number of relationships charged off | 4 |  |

X
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- Definition Reflects the minimum number of family development loans that include restrictive underwriting standards that inhibit the buys from obtaining long term financing and excessive housing and lot inventory in the market. + References No definition available. + Details
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- Definition Amount of increase (decrease) of allowance reserve for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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