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Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Summary of carrying basis and accumulated amortization of recognized intangible assets |  |
Gross Carrying Amount | $ 6,793 | $ 6,492
Accumulated Amortization | (5,244) | (4,484)
Banking intangibles [Member] |  |
Summary of carrying basis and accumulated amortization of recognized intangible assets |  |
Gross Carrying Amount | 5,651 | 5,651
Accumulated Amortization | (4,432) | (3,802)
Banking intangibles [Member] | Core deposits intangible [Member] |  |
Summary of carrying basis and accumulated amortization of recognized intangible assets |  |
Gross Carrying Amount | 5,451 | 5,451
Accumulated Amortization | (4,302) | (3,680)
Banking intangibles [Member] | Customer relationship intangible [Member] |  |
Summary of carrying basis and accumulated amortization of recognized intangible assets |  |
Gross Carrying Amount | 200 | 200
Accumulated Amortization | (130) | (122)
Purchased software [Member] |  |
Summary of carrying basis and accumulated amortization of recognized intangible assets |  |
Gross Carrying Amount | 1,142 | 841
Accumulated Amortization | (812) | (682)
Purchased software [Member] | Banking [Member] |  |
Summary of carrying basis and accumulated amortization of recognized intangible assets |  |
Gross Carrying Amount | 978 | 679
Accumulated Amortization | (700) | (598)
Purchased software [Member] | Data processing [Member] |  |
Summary of carrying basis and accumulated amortization of recognized intangible assets |  |
Gross Carrying Amount | 164 | 162
Accumulated Amortization | $ (112) | $ (84)

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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