Income Taxes	3 Months Ended
Mar. 31, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our effective tax rate was 36.6% for the three months ended March 31, 2013 compared to 36.8% for the same period in 2012. The provision for income taxes for both the three months ended March 31, 2013 and 2012 included a $0.1 million net benefit which reduced our effective tax rate by approximately 2.4% and 2.0%, respectively. The net benefit related primarily to federal tax credits during the three months ended March 31, 2013 and to the expiration of the statute of limitations for uncertain tax positions during the same period in 2012. The total gross amount of unrecognized tax benefits related to federal, state and foreign taxes was approximately $1.6 million and $1.7 million at March 31, 2013 and 2012, respectively, all of which would impact our effective tax rate, if recognized. The expiration of the statute of limitations for certain tax positions in future years and expected settlement of certain tax audit issues could impact the total gross amount of unrecognized tax benefits by $1.1 million through March 31, 2014. We file U.S. federal, state and foreign income tax returns in jurisdictions with varying statutes of limitations. In 2011, the IRS initiated an examination of our federal tax returns for 2009 and 2010. The examination was finalized in the quarter and resulted in no adjustments. The 2011 to 2012 tax years remain subject to examination by federal authorities. In addition, certain pre-acquisition income tax returns are still subject to examination by federal and state tax authorities for 2009 to 2012 tax years. The 2009 to 2012 tax years remain subject to examination by state tax authorities with the 2008 tax year still open for certain state tax authorities. The 2005 to 2012 tax years remain subject to examination by the tax authorities in certain foreign jurisdictions.

Income Taxes

3 Months Ended

Mar. 31, 2013

Our effective tax rate was 36.6% for the three months ended March 31, 2013 compared to 36.8% for the same period in 2012. The provision for income taxes for both the three months ended March 31, 2013 and 2012 included a $0.1 million net benefit which reduced our effective tax rate by approximately 2.4% and 2.0%, respectively. The net benefit related primarily to federal tax credits during the three months ended March 31, 2013 and to the expiration of the statute of limitations for uncertain tax positions during the same period in 2012.

The total gross amount of unrecognized tax benefits related to federal, state and foreign taxes was approximately $1.6 million and $1.7 million at March 31, 2013 and 2012, respectively, all of which would impact our effective tax rate, if recognized. The expiration of the statute of limitations for certain tax positions in future years and expected settlement of certain tax audit issues could impact the total gross amount of unrecognized tax benefits by $1.1 million through March 31, 2014.

We file U.S. federal, state and foreign income tax returns in jurisdictions with varying statutes of limitations. In 2011, the IRS initiated an examination of our federal tax returns for 2009 and 2010. The examination was finalized in the quarter and resulted in no adjustments. The 2011 to 2012 tax years remain subject to examination by federal authorities. In addition, certain pre-acquisition income tax returns are still subject to examination by federal and state tax authorities for 2009 to 2012 tax years. The 2009 to 2012 tax years remain subject to examination by state tax authorities with the 2008 tax year still open for certain state tax authorities. The 2005 to 2012 tax years remain subject to examination by the tax authorities in certain foreign jurisdictions.