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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Income Taxes [Abstract]    
Unrecognized tax benefits that would impact effective tax rate $ 3,229  
Accrued interest and penalties 477  
Reduction of unrecognized tax benefits for the expiration of statute of limitations in various jurisdictions and settlements of foreign audits 85  
Income Tax benefits relating to stock plans 1,076 739
Unrecognized Tax Benefits $ 3,454