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Disclosures About Fair Value Measurements (Assets Measured at Fair Value Measured on Non-Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified |  |  | 3 Months Ended |  |  |  |  |  |  |  |  |  |  |  |
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Mar. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2013 Level 3 [Member] | Mar. 31, 2013 Level 3 [Member] Minimum [Member] | Dec. 31, 2012 Level 3 [Member] Minimum [Member] | Mar. 31, 2013 Level 3 [Member] Maximum [Member] | Dec. 31, 2012 Level 3 [Member] Maximum [Member] | Mar. 31, 2013 Fair Value Measurements, Nonrecurring Basis [Member] | Dec. 31, 2012 Fair Value Measurements, Nonrecurring Basis [Member] | Mar. 31, 2013 Fair Value Measurements, Nonrecurring Basis [Member] Level 1 [Member] | Dec. 31, 2012 Fair Value Measurements, Nonrecurring Basis [Member] Level 1 [Member] | Mar. 31, 2013 Fair Value Measurements, Nonrecurring Basis [Member] Level 2 [Member] | Dec. 31, 2012 Fair Value Measurements, Nonrecurring Basis [Member] Level 2 [Member] | Mar. 31, 2013 Fair Value Measurements, Nonrecurring Basis [Member] Level 3 [Member] | Dec. 31, 2012 Fair Value Measurements, Nonrecurring Basis [Member] Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other real estate owned |  |  |  |  |  |  |  | $ 1,205 | $ 1,228 |  |  |  |  | $ 1,205 | $ 1,228
Liquidation Expense |  |  |  | 1.00% | 1.00% | 15.00% | 15.00% |  |  |  |  |  |  |  |
Estimated Liquidation Expense |  |  |  | 1.00% | 1.00% | 20.00% | 20.00% |  |  |  |  |  |  |  |
Valuation Techniques |  |  | Appraisal of Collateral |  |  |  |  |  |  |  |  |  |  |  |
Appraisal of Adjustment |  |  |  | 1.00% | 1.00% | 35.00% | 35.00% |  |  |  |  |  |  |  |
Carrying value of impaired loans | $ 2,339 | $ 4,806 |  |  |  |  |  | $ 1,862 | $ 3,220 |  |  |  |  | $ 1,862 | $ 3,220

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- Definition Fair value of impaired loans appraisal of adjustments. + References No definition available. + Details
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- Definition Fair value of impaired loans liquidation expenses. + References No definition available. + Details
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- Definition Fair value of other real estate owned estimated liquidation expenses. + References No definition available. + Details
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- Details
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- Definition Description of the inputs and valuation technique(s) used to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition The fair value as of the balance sheet date of firm holdings in other positions not elsewhere specified in the taxonomy. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6475986&loc=d3e42546-110969 + Details
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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 + Details
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