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Income Taxes
6 Months Ended
Jul. 01, 2012
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes

The income tax provision for the three and six months ended July 1, 2012 was $9.9 million or an effective tax rate of 31.6% and $20.5 million or an effective tax rate of 30.5%, respectively. The income tax provision for the three and six months ended July 3, 2011 was $6.7 million or an effective tax rate of 24.7% and $15.9 million or an effective tax rate of 27.5%, respectively. The increase in the effective tax rate for the three and six month periods ended July 1, 2012, compared to the same period in the prior year was primarily caused by reductions in stock option benefits and the expiration of the federal research tax credit.

The Company has recorded the portion of its liability for uncertain tax positions that are not expected to be paid over the next 12 months as part of its long-term liability. The existing tax positions of the Company continue to generate an increase in the liability for uncertain tax positions. The Company is under examination in various US and foreign jurisdictions including by the U.S. Internal Revenue Service. The examination by the Internal Revenue Service includes the 2008 and 2009 calendar years. The liability for uncertain tax positions may be reduced for liabilities that are settled with taxing authorities or on which the statute of limitations could expire without assessment from tax authorities. The possible reduction in uncertain tax positions in multiple jurisdictions that may impact the statement of operations in the next 12 months is approximately $3.0 million, excluding interest, penalties and the effect of any related deferred tax assets or liabilities.