Income Taxes	9 Months Ended
Sep. 30, 2012
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective income tax rates were 20.3% and 25.7% for the three months ended September 30, 2012 and 2011, respectively. The effective income tax rates were 28.1% and 29.2% for the nine months ended September 30, 2012 and September 30, 2011, respectively. The effective income tax rate for the three and nine months ended September 30, 2012 were lower than the U.S federal income tax rate of 35% due to the impact of foreign operations, partially offset by state taxes. Additionally, the effective income tax rates also reflect a nonrecurring favorable adjustment of $4.5 million related to foreign operations. The effective income tax rates for the three and nine months ended September 30, 2011 were lower than the U.S. federal statutory rate of 35% due to the identification of $2.1 million of additional federal tax benefits, and a nonrecurring favorable adjustment of $1.9 million for unrecognized tax positions. Additionally, an adjustment to our current federal taxes payable of $1.4 million reduced the effective tax rate for the nine months ended September 30, 2011. The Company's U.S. federal income tax returns for tax years 2007, 2009 and 2010 are currently under examination by the Internal Revenue Service. As of September 30, 2011, the Company has not been advised of any material adjustments.

Income Taxes

9 Months Ended

Sep. 30, 2012

The effective income tax rates were 20.3% and 25.7% for the three months ended September 30, 2012 and 2011, respectively.

The effective income tax rates were 28.1% and 29.2% for the nine months ended September 30, 2012 and September 30, 2011, respectively. The effective income tax rate for the three and nine months ended September 30, 2012 were lower than the U.S federal income tax rate of 35% due to the impact of foreign operations, partially offset by state taxes. Additionally, the effective income tax rates also reflect a nonrecurring favorable adjustment of $4.5 million related to foreign operations. The effective income tax rates for the three and nine months ended September 30, 2011 were lower than the U.S. federal statutory rate of 35% due to the identification of $2.1 million of additional federal tax benefits, and a nonrecurring favorable adjustment of $1.9 million for unrecognized tax positions. Additionally, an adjustment to our current federal taxes payable of $1.4 million reduced the effective tax rate for the nine months ended September 30, 2011.

The Company's U.S. federal income tax returns for tax years 2007, 2009 and 2010 are currently under examination by the Internal Revenue Service. As of September 30, 2011, the Company has not been advised of any material adjustments.