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

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.

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

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- Definition

Amount of investment in financing receivables (after modification) modified by troubled debt restructurings.

+ References

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- Definition

Amount of investment in financing receivables (before modification) modified by troubled debt restructurings.

+ References

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