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Fair Value Measurements and Fair Value of Financial Instruments (Additional Qualitative Information about Level 3 Assets) (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2013 | Dec. 31, 2012
Minimum [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value Disclosure, Unbservable Input Range |  | 0.00
Maximum [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value Disclosure, Unbservable Input Range |  | -30%
Weighted Average [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value Disclosure, Unbservable Input Range |  | (24.10%)
Impaired Loans [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | $ 9,749 | $ 11,616
Fair Value Disclosure, Unbservable Input Range | 0-30% (11.77)% |
Impaired Loans [Member] | Unobservable Inputs Appraisal Adjustments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value Measurements, Valuation Techniques |  | Appraisal of collateral(1)
Fair Value Disclosure, Unbservable Input Range | Appraisal adjustments(2) | Appraisal adjustments(2)
Impaired Loans [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value Measurements, Valuation Techniques | Appraisal of collateral(1) |
Foreclosed Real Estate Owned [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | $ 1,297 | $ 852
Fair Value Disclosure, Unbservable Input Range | 20% | 20%
Foreclosed Real Estate Owned [Member] | Unobservable Inputs Appraisal Adjustments [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value Disclosure, Unbservable Input Range |  | Liquidation Expenses(2)
Foreclosed Real Estate Owned [Member] | Unobservable Inputs - Liquidation Expenses [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value Measurements, Valuation Techniques |  | Appraisal of collateral(1)(3)
Fair Value Disclosure, Unbservable Input Range | Liquidation Expenses(2) |
Foreclosed Real Estate Owned [Member] | Significant Unobservable Inputs (Level 3) [Member] | Unobservable Inputs - Liquidation Expenses [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value Measurements, Valuation Techniques | Appraisal of collateral(1)(3) |

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- Definition Fair Value Disclosure, Unbservable Input Range + References No definition available. + Details
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Data Type: | xbrli:stringItemType
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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=25499696&loc=d3e19207-110258 + Details
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