Income Taxes	3 Months Ended
Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Our effective tax rate was 30% for the three months ended March 31, 2017, compared to 33% for three months ended March 31, 2016. The difference in the effective rates for the current year compared to prior year is primarily attributable to the mix of pretax income among domestic and foreign jurisdictions which are taxed at different rates. In addition, the effective tax rate reflects incremental benefits associated with equity awards in accordance with new accounting rules, as well as the impact on deferred taxes of reductions in the statutory tax rates in Quebec, Canada and India. As of March 31, 2017, our gross liability for unrecognized tax benefits was $4.3 million. If fully recognized, these tax benefits would decrease our income tax expense by $4.3 million ($2.8 million, net of federal tax). Based upon the status of current state income tax audits and our expectation of the ultimate resolution, we believe that it is reasonably possible that we will recognize a tax benefit of $4.3 million ($2.8 million, net of federal tax) within the next 12 months.

Income Taxes

3 Months Ended

Mar. 31, 2017

Our effective tax rate was 30% for the three months ended March 31, 2017, compared to 33% for three months ended March 31, 2016. The difference in the effective rates for the current year compared to prior year is primarily attributable to the mix of pretax income among domestic and foreign jurisdictions which are taxed at different rates. In addition, the effective tax rate reflects incremental benefits associated with equity awards in accordance with new accounting rules, as well as the impact on deferred taxes of reductions in the statutory tax rates in Quebec, Canada and India.

As of March 31, 2017, our gross liability for unrecognized tax benefits was $4.3 million. If fully recognized, these tax benefits would decrease our income tax expense by $4.3 million ($2.8 million, net of federal tax). Based upon the status of current state income tax audits and our expectation of the ultimate resolution, we believe that it is reasonably possible that we will recognize a tax benefit of $4.3 million ($2.8 million, net of federal tax) within the next 12 months.