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Loans, Troubled Debt Restructuring (Details) (USD $) | Sep. 30, 2012 | Dec. 31, 2011
--- | --- | ---
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | 138 | 315
Pre-Modification Outstanding Recorded Investment | $ 32,431,000 | $ 54,660,000
Post-Modification Outstanding Recorded Investment | 21,835,000 | 44,133,000
Performing troubled debt restructuring loan | 1,800,000 | 15,100,000
Real Estate Loans - Construction and land development [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | 20 | 29
Pre-Modification Outstanding Recorded Investment | 16,735,000 | 19,762,000
Post-Modification Outstanding Recorded Investment | 9,824,000 | 12,840,000
Real Estate Loans - Single-family residential [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | 97 | 241
Pre-Modification Outstanding Recorded Investment | 10,965,000 | 25,541,000
Post-Modification Outstanding Recorded Investment | 10,118,000 | 24,846,000
Real Estate Loans - Commercial [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | 5 | 15
Pre-Modification Outstanding Recorded Investment | 3,136,000 | 7,200,000
Post-Modification Outstanding Recorded Investment | 981,000 | 5,013,000
Real Estate Loans - Multifamily and farmland [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | 1 | 1
Pre-Modification Outstanding Recorded Investment | 322,000 | 322,000
Post-Modification Outstanding Recorded Investment | 200,000 | 209,000
Total real estate TDR loans [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | 123 | 286
Pre-Modification Outstanding Recorded Investment | 31,158,000 | 52,825,000
Post-Modification Outstanding Recorded Investment | 21,123,000 | 42,908,000
Commercial (not secured by real estate) [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | 14 | 21
Pre-Modification Outstanding Recorded Investment | 1,271,000 | 1,711,000
Post-Modification Outstanding Recorded Investment | 706,000 | 1,083,000
Consumer loans (not secured by real estate) [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | 1 | 8
Pre-Modification Outstanding Recorded Investment | 2,000 | 124,000
Post-Modification Outstanding Recorded Investment | $ 6,000 | $ 142,000

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- Definition Financing arrangement that represents a contractual right to receive money either on demand or on fixed or determinable dates that are current in regards to payments. + References No definition available. + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953676-111524 + Details
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- Definition Amount of investment in financing receivables (after modification) modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953676-111524 + Details
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- Definition Amount of investment in financing receivables (before modification) modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953676-111524 + Details
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