Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011
Total amount of unrecognized tax benefits
Total unrecognized tax benefits as of December 31, 2010	$ 425
Tax positions taken during a prior period	0
Tax positions taken during the current period	0
Settlements with taxing authorities	(40)
Lapse of applicable statute of limitations	0
Total unrecognized tax benefits as of December 31, 2011	$ 385

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The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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