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Securities (Details Textual) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2012
Available-for-sale Securities, Gross Realized Gains | $ 102 | $ 40 |
Available-for-sale Securities, Gross Realized Losses | 287 | 0 |
Available For Sale Securities Continuous Unrealized Loss Position Fair Value In Percentage | 19.00% |  | 27.00%
Securities available for sale, Total, Fair Value | $ 31,079 |  | $ 41,986
I Pretsl I B 2 Pooled Trust Security [Member] |  |  |
Investment Par Value | $ 2,000 |  |
Alesco Iv Series B2 Pooled Trust Security [Member] |  |  |
Investment Par Value | $ 2,000 |  |

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- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position in percentage. + References No definition available. + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are 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)(1) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 Reference 2: 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-Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 3: 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FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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