Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details 4)

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Income Taxes (Details 4) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Reconciliation of the total amounts of unrecognized tax benefits excluding interest and penalties      
Balance at Beginning of the Year $ 880 $ 1,470 $ 940
Decreases as a Result of Tax Positions Taken in Prior Years (220) (1,090) (270)
Increases as a Result of Tax Positions taken in the Current Year 180 500 800
Balance at End of the Year $ 840 $ 880 $ 1,470