Income taxes	3 Months Ended
Mar. 31, 2013
Income Tax Disclosure [Abstract]
Income taxes	13. Income taxes The Company recognized a $3.3 million and $7.4 million provision for income tax which reflects an effective tax rate of 40.4% and 37.6% on pre-tax income for the three months ended March 31, 2013 and 2012, respectively. Excluding the impact of various discrete charges, the effective tax rate on continuing operations was 37% for the first three months of 2013 and 2012. The principal factors affecting the Company’s effective tax rate was the Company’s mix of earnings among various tax jurisdictions, state taxes and current period losses in certain jurisdictions for which the Company does not currently provide a tax benefit. On January 2, 2013, the American Taxpayer Relief Act of 2012 (“Act”) was enacted. The Act provides tax relief for businesses by reinstating certain tax benefits and credits retroactively to January 1, 2012. There are several provisions of the Act that impact the Company, most notably the extension of the Research and Development credit. Income tax accounting rules require tax law changes to be recognized in the period of enactment; as such, the associated tax benefits of the Act was recognized in the Company’s provision for income taxes in the first quarter of 2013. As of March 31, 2013 and December 31, 2012, the Company’s gross unrecognized tax benefit was $0.7 million and $1.0 million, respectively. The Company recognizes potential accrued interest and penalties related to unrecognized tax benefits in income tax expense. In March 2013 the Company settled a $0.9 million liability that had been previously accrued as of December 31, 2012. The entire amount of unrecognized tax benefits, including interest, would favorably impact the Company’s effective tax rate if recognized. As of March 31, 2013, the Company does not expect the amount of unrecognized tax benefits to change significantly over the next twelve months.

Income taxes

3 Months Ended

Mar. 31, 2013

13. Income taxes

The Company recognized a $3.3 million and $7.4 million provision for income tax which reflects an effective tax rate of 40.4% and 37.6% on pre-tax income for the three months ended March 31, 2013 and 2012, respectively. Excluding the impact of various discrete charges, the effective tax rate on continuing operations was 37% for the first three months of 2013 and 2012. The principal factors affecting the Company’s effective tax rate was the Company’s mix of earnings among various tax jurisdictions, state taxes and current period losses in certain jurisdictions for which the Company does not currently provide a tax benefit.

On January 2, 2013, the American Taxpayer Relief Act of 2012 (“Act”) was enacted. The Act provides tax relief for businesses by reinstating certain tax benefits and credits retroactively to January 1, 2012. There are several provisions of the Act that impact the Company, most notably the extension of the Research and Development credit. Income tax accounting rules require tax law changes to be recognized in the period of enactment; as such, the associated tax benefits of the Act was recognized in the Company’s provision for income taxes in the first quarter of 2013.

As of March 31, 2013 and December 31, 2012, the Company’s gross unrecognized tax benefit was $0.7 million and $1.0 million, respectively. The Company recognizes potential accrued interest and penalties related to unrecognized tax benefits in income tax expense. In March 2013 the Company settled a $0.9 million liability that had been previously accrued as of December 31, 2012. The entire amount of unrecognized tax benefits, including interest, would favorably impact the Company’s effective tax rate if recognized. As of March 31, 2013, the Company does not expect the amount of unrecognized tax benefits to change significantly over the next twelve months.