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Fair Value of Assets and Liabilities (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2012
Collateral-dependent impaired loans [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | $ 1,511 | $ 2,227
Fair Value Measurements, Valuation Techniques | Market comparable properties | Market comparable properties
Fair Value Measurements, Unobservable Inputs | Comparability adjustments (%) | Comparability adjustments (%)
Collateral-dependent impaired loans [Member] | Comparability adjustments (%) [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Range (Weighted Average) | 0.00% | 0.00%
Foreclosed assets [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 84 | 950
Fair Value Measurements, Valuation Techniques | Market comparable properties | Market comparable properties
Fair Value Measurements, Unobservable Inputs | Marketability discount | Marketability discount
Foreclosed assets [Member] | Marketability discount [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Range (Weighted Average) | 10.00% | 10.00%
Mortgage servicing rights [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | $ 2,388 | $ 2,667
Fair Value Measurements, Valuation Techniques | Discounted cash flow | Discounted cash flow
Fair Value Measurements, Unobservable Inputs | Discount Rate Constant prepayment rate P&I earnings credit T&I earnings credit Inflation for cost of servicing | Discount Rate Constant prepayment rate P&I earnings credit T&I earnings credit Inflation for cost of servicing.
Mortgage servicing rights [Member] | Discount Rate [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Range (Weighted Average) | 8.75% | 8.50%
Mortgage servicing rights [Member] | Constant prepayment rate [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Range (Weighted Average) | 13.10% | 15.60%
Mortgage servicing rights [Member] | P&I earnings credit [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Range (Weighted Average) | 0.20% | 0.21%
Mortgage servicing rights [Member] | T&I earnings credit [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Range (Weighted Average) | 0.96% | 0.81%
Mortgage servicing rights [Member] | Inflation for cost of servicing [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Range (Weighted Average) | 1.50% | 1.50%

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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 This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. + 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 (c) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c -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. + Details
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