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Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Changes in fair value: |  |  |  |  |  |
Balance at end of year | $ 2,762 us-gaap_ServicingAssetAtFairValueAmount |  | $ 3,036 us-gaap_ServicingAssetAtFairValueAmount |  |  |
Mortgage servicing rights (MSRs) |  |  |  |  |  |
Changes in mortgage servicing rights |  |  |  |  |  |
Balance at beginning of year | 3,036 us-gaap_ServicingAssetAtFairValueAmount / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |  | 2,549 us-gaap_ServicingAssetAtFairValueAmount / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |  | 2,308 us-gaap_ServicingAssetAtFairValueAmount / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |
Re-measurement to fair value upon election to measure servicing rights at fair value | 0 us-gaap_AssetsFairValueAdjustment / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |  | 0 us-gaap_AssetsFairValueAdjustment / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |  | 742 us-gaap_AssetsFairValueAdjustment / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |
Originated mortgage servicing rights | 302 us-gaap_ServicingAssetAtFairValueAdditions / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |  | 512 us-gaap_ServicingAssetAtFairValueAdditions / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |  | 830 us-gaap_ServicingAssetAtFairValueAdditions / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |
Changes in fair value: |  |  |  |  |  |
Due to change in model inputs and assumptions | 66 us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember | [1] | 723 us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember | [1] | 241 us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember | [1]
Other changes in fair value | (642)us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember | [2] | (748)us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember | [2] | (1,572)us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember | [2]
Amortization | 0 us-gaap_ServicingAssetAtAmortizedValueAmortization1 / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |  | 0 us-gaap_ServicingAssetAtAmortizedValueAmortization1 / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |  | 0 us-gaap_ServicingAssetAtAmortizedValueAmortization1 / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |
Balance at end of year | $ 2,762 us-gaap_ServicingAssetAtFairValueAmount / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |  | $ 3,036 us-gaap_ServicingAssetAtFairValueAmount / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |  | $ 2,549 us-gaap_ServicingAssetAtFairValueAmount / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember |
[1] | The change in fair value resulting from changes in valuation inputs or assumptions used in the valuation model reflects the change in discount rates and prepayment speed assumptions primarily due to changes in interest rates.
[2] | Other changes in fair value reflect changes due to customer payments and passage of time. The year ended December 31, 2012 includes a one time adjustment of a $538,000 correction of an immaterial prior period error due to changing from the straight-line amortization method to an accelerated amortization method of accounting for amortizing MSRs in prior years.

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- Definition Amount of addition (reduction) to the amount at which an asset could be incurred (settled) in a current transaction between willing parties. + References No definition available. + Details
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- Definition Amount of amortization of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746 + Details
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- Definition The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746 + Details
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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746 + Details
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- Definition The net Increase or Decrease in fair value as a result of changes in the inputs, assumptions, or model used to calculate the fair value of servicing assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(4)(i) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746 + Details
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- Definition The net Increase or Decrease in fair value as a result of other changes that are not additions, disposals, or a result of change in the inputs, assumptions, or model used to calculate the fair value of servicing assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(4)(ii) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746 + Details
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