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Securities (Details 1) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Gross unrealized losses, aggregated by investment category and length of time |  |
Gross unrealized losses, less than twelve months | $ (227) | $ (37)
Fair value, less than twelve months | 46,505 | 12,844
Gross unrealized losses, twelve months & over |  |
Fair value, twelve months & over |  |
U.S. Treasury [Member] |  |
Gross unrealized losses, aggregated by investment category and length of time |  |
Gross unrealized losses, less than twelve months | (36) |
Fair value, less than twelve months | 10,568 |
Gross unrealized losses, twelve months & over |  |
Fair value, twelve months & over |  |
U.S. Government agency [Member] |  |
Gross unrealized losses, aggregated by investment category and length of time |  |
Gross unrealized losses, less than twelve months | (171) | (18)
Fair value, less than twelve months | 33,034 | 12,192
Gross unrealized losses, twelve months & over |  |
Fair value, twelve months & over |  |
Mortgage-backed securities [Member] |  |
Gross unrealized losses, aggregated by investment category and length of time |  |
Gross unrealized losses, less than twelve months |  | (18)
Fair value, less than twelve months |  |
Gross unrealized losses, twelve months & over |  |
Fair value, twelve months & over |  |
State and local governments [Member] |  |
Gross unrealized losses, aggregated by investment category and length of time |  |
Gross unrealized losses, less than twelve months | (20) | (1)
Fair value, less than twelve months | 2,903 | 652
Gross unrealized losses, twelve months & over |  |
Fair value, twelve months & over |  |

X
- Definition Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for securities which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for less than twelve months for securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27337-111563 + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a(2) -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -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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