Income Taxes	6 Months Ended
Jun. 30, 2011
Income Taxes [Abstract]
Income Taxes	Note 6. Income Taxes The Company’s effective tax rate for the six months ended June 30, 2011 and 2010 was 34.0% and 59.1%, respectively. The Company recognized tax expense of $4.0 million and a tax benefit of $7.2 million for the six months ended June 30, 2011 and 2010, respectively. The difference between the June 30, 2011 and June 30, 2010 effective tax rate is primarily due to the exclusion of the federal research and development tax credit and certain acquisition related non-deductible transaction costs during the first six months of 2010. The Company is subject to periodic audits by domestic and foreign tax authorities. The Company’s federal tax years for 1995 and forward are subject to examination by the U.S. authorities due to the carry forward of unutilized net operating losses and research and development credits. With few exceptions, the Company’s tax years for 1999 and forward are subject to examination by state and foreign tax authorities. The Company believes that it has appropriate support for the income tax positions taken on its tax returns and that its accruals for tax liabilities are adequate for all open years based on its assessment of many factors, including past experience and interpretations of tax law applied to the facts of each matter.

Income Taxes

6 Months Ended

Jun. 30, 2011

Note 6. Income Taxes

The Company’s effective tax rate for the six months ended June 30, 2011 and 2010 was 34.0% and 59.1%, respectively. The Company recognized tax expense of $4.0 million and a tax benefit of $7.2 million for the six months ended June 30, 2011 and 2010, respectively. The difference between the June 30, 2011 and June 30, 2010 effective tax rate is primarily due to the exclusion of the federal research and development tax credit and certain acquisition related non-deductible transaction costs during the first six months of 2010.

The Company is subject to periodic audits by domestic and foreign tax authorities. The Company’s federal tax years for 1995 and forward are subject to examination by the U.S. authorities due to the carry forward of unutilized net operating losses and research and development credits. With few exceptions, the Company’s tax years for 1999 and forward are subject to examination by state and foreign tax authorities. The Company believes that it has appropriate support for the income tax positions taken on its tax returns and that its accruals for tax liabilities are adequate for all open years based on its assessment of many factors, including past experience and interpretations of tax law applied to the facts of each matter.