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Securities (Details 1) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Trading securities accounted for under the fair value option |  |
Trading securities | $ 4,459 | $ 3,233
Corporate equity securities [Member] |  |
Trading securities accounted for under the fair value option |  |
Trading securities | 3,117 | 1,959
Certificates of deposit [Member] |  |
Trading securities accounted for under the fair value option |  |
Trading securities | 408 | 255
International mutual funds [Member] |  |
Trading securities accounted for under the fair value option |  |
Trading securities | 287 | 257
Large cap growth mutual funds [Member] |  |
Trading securities accounted for under the fair value option |  |
Trading securities | 157 | 145
Money market mutual funds [Member] |  |
Trading securities accounted for under the fair value option |  |
Trading securities | 110 | 241
Large cap value mutual funds [Member] |  |
Trading securities accounted for under the fair value option |  |
Trading securities | 104 | 105
Corporate notes and bonds [Member] |  |
Trading securities accounted for under the fair value option |  |
Trading securities | 101 | 100
Real estate investment trust mutual funds [Member] |  |
Trading securities accounted for under the fair value option |  |
Trading securities | 65 | 68
U.S. Government sponsored entities [Member] |  |
Trading securities accounted for under the fair value option |  |
Trading securities | 58 | 55
Small cap mutual funds [Member] |  |
Trading securities accounted for under the fair value option |  |
Trading securities | 26 | 25
Mid cap mutual funds [Member] |  |
Trading securities accounted for under the fair value option |  |
Trading securities | $ 26 | $ 23

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- Definition Financial instruments that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time, usually less than one year or the normal operating cycle, whichever is longer) or for debt and equity securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Implementation Guide (Q and A) -Number FAS115 -Paragraph 35 -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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 13 -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 29 -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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 12 -Subparagraph a -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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