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Available-for-Sale Securities (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Carrying Value [Member]
Available-for-sale securities original contractual maturity
Due in one year or less	$ 9,214	$ 8,683
Due greater than three years and less than five years	0	287
Total available-for-sale securities	9,214	8,970
Fair Value [Member]
Available-for-sale securities original contractual maturity
Due in one year or less	9,214	8,683
Due greater than three years and less than five years	0	287
Total available-for-sale securities	$ 9,214	$ 8,970

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Available-for-sale securities by contractual maturity due greater than three years and less than five years.

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Available-for-sale securities by contractual maturity due in one year.

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- Definition

Available-for-sale securities by contractual maturity total.

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