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Investment Securities (Details Textual) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2012 Position | Sep. 30, 2011 | Sep. 30, 2012 Position | Sep. 30, 2011 | Dec. 31, 2011
Investment Securities (Textual) [Abstract] |  |  |  |  |
Gain (Loss) on Sale of Securities, Gross |  |  | $ 12,000 | $ (358,000) |
Investment Securities (Additional Textual) [Abstract] |  |  |  |  |
Consolidated investment securities portfolio modified, years | 1 year 5 months 16 days |  | 1 year 5 months 16 days |  |
Proceeds from sales of investment securities - available for sale | 0 |  | 4,221,000 | 16,518,000 |
Book value of securities available for sale and held to maturity | 89,663,000 |  | 89,663,000 |  | 83,235,000
Positions considered temporarily impaired | 11 |  | 11 |  |
Standard & Poor's, AAA Rating [Member] |  |  |  |  |
Investment Securities (Textual) [Abstract] |  |  |  |  |
Portfolio rated | 93.70% |  | 93.70% |  | 98.40%
Standard & Poor's, A Rating [Member] |  |  |  |  |
Investment Securities (Textual) [Abstract] |  |  |  |  |
Portfolio rated | 1.20% |  | 1.20% |  |
Gross Investment Securities Gain [Member] |  |  |  |  |
Investment Securities (Textual) [Abstract] |  |  |  |  |
Gain (Loss) on Sale of Securities, Gross | 59,000 | 0 |  |  |
Gross Investment Securities Loss [Member] |  |  |  |  |
Investment Securities (Textual) [Abstract] |  |  |  |  |
Gain (Loss) on Sale of Securities, Gross |  |  | $ 47,000 | $ (358,000) |

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- Definition The net gain (loss) realized from the sale, exchange, redemption, or retirement of securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 3 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.3) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Subparagraph h -Article 9 + Details
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- Definition Disclosure regarding factors used to determine that the impairment of securities categorized as held-to-maturity where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the held-to-maturity investments determined to be temporarily impaired. + 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 (b)(3) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph b(3) -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 FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph b(3) -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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