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Investments and Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2012

Investments and Fair Value Measurements [Abstract]

Schedule of investments

		September 30, 2012				December 31, 2011
		Held-to- Maturity				Held-to- Maturity
Federal agency debt instruments		$	9,412			$	9,056

Schedule of unrealized gains, losses, and fair value of investments

		September 30, 2012				December 31, 2011
		Held-to- Maturity				Held-to- Maturity
Cost/amortized cost		$	9,412			$	9,056
Gross unrealized gains			88				53
Gross unrealized losses			(95	)			(112	)
Fair value		$	9,405			$	8,997

Schedule of maturity profile of investments

		September 30, 2012				December 31, 2011
		Held-to- Maturity				Held-to- Maturity
Due within one year		$	—			$	—
Due one year through five years			—				250
Due five years through ten years			389				1,134
Due over ten years			9,023				7,672
Total		$	9,412			$	9,056

X

- Definition

Tabular disclosure of all investments in certain debt and equity securities for which the entity has the positive intent and ability to hold until maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=6435544&loc=d3e41834-113960



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 137

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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