Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Publisher FASB

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+ Details

- Definition

Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

+ References+ Details

Loans and Allowance for Loan Losses (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2013 loan	Mar. 31, 2012 loan	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, unearned income	$ 530,000		$ 736,000
Loan participations purchased during period, held for investment		0
Allowance for loan losses, historical period used for loss rates	5 years
Credit commitments available for construction and land development restructured loans	0		0
Loans restructured during the period	0	0
Commercial and Consumer \| Federal Reserve Bank
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral	14,635,000		16,703,000
Individual Real Estate-Secured Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfer of mortgage loans from held-for-sale to loans held for investment	1,833,000	1,997,000
Individual Real Estate-Secured Loans \| Federal Home Loan Bank Advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral	103,412,000		145,064,000
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan participations purchased during period, held for investment	$ 561,000
Adjustment to historical loan loss rate due to environmental factors (as a percentage)			0.15%
Commerical Agricultural and Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Adjustment to historical loan loss rate due to environmental factors (as a percentage)			0.35%