Investment Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Available For Sale Securities Continuous Unrealized Loss Position [Abstract]
Available for sale less than twelve months, Fair value	$ 2,995	$ 6,994
Available for sale less than twelve months, Unrealized losses	3	3
Available for sale less than twelve months, Number of securities	1	3
Available for sale more than twelve months, Fair value	0	52
Available for sale more than twelve months, Unrealized losses	0	54
Available for sale more than twelve months, Number of securities	0	2
Corporate equity securities [Member]
Available For Sale Securities Continuous Unrealized Loss Position [Abstract]
Available for sale less than twelve months, Fair value		0
Available for sale less than twelve months, Unrealized losses		0
Available for sale less than twelve months, Number of securities		0
Available for sale more than twelve months, Fair value		52
Available for sale more than twelve months, Unrealized losses		54
Available for sale more than twelve months, Number of securities		2
U.S. government sponsored enterprises [Member]
Available For Sale Securities Continuous Unrealized Loss Position [Abstract]
Available for sale less than twelve months, Fair value	2,995	6,994
Available for sale less than twelve months, Unrealized losses	3	3
Available for sale less than twelve months, Number of securities	1	3
Available for sale more than twelve months, Fair value	0	0
Available for sale more than twelve months, Unrealized losses	$ 0	$ 0
Available for sale more than twelve months, Number of securities	0	0

Number of securities less than twelve months in continuous unrealized loss available for sale.

No definition available.

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- Definition

Number of securities more than twelve months in continuous unrealized loss available for sale.

+ 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 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

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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.

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- Definition

+ References

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