Income Taxes	3 Months Ended
Mar. 31, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company's effective income tax rate was 36.4% for the three months ended March 31, 2013 and differed from the U.S. federal statutory rate primarily due to state income taxes. For the three months ended March 31, 2012, the effective income tax rate was 27.9% and differed from the U.S. federal statutory rate primarily due to favorable adjustments to state tax credits that were recorded in the first quarter of 2012. In the ordinary course of business, the Company is subject to review by domestic and foreign taxing authorities, including the Internal Revenue Service (“IRS”). The Company was previously under audit by the IRS for the years 2008 through 2010. The Company has been notified that the audit was completed and approved. In general, the Company is no longer subject to audit by the IRS, state and local or foreign taxing authorities for tax years prior to 2008. Various other taxing authorities are in the process of auditing income tax returns of the Company and its subsidiaries. The Company does not anticipate that any adjustments from the audits would have a material impact on its consolidated financial position, results of operations or cash flows.

Income Taxes

3 Months Ended

Mar. 31, 2013

The Company's effective income tax rate was 36.4% for the three months ended March 31, 2013 and differed from the U.S. federal statutory rate primarily due to state income taxes. For the three months ended March 31, 2012, the effective income tax rate was 27.9% and differed from the U.S. federal statutory rate primarily due to favorable adjustments to state tax credits that were recorded in the first quarter of 2012.

In the ordinary course of business, the Company is subject to review by domestic and foreign taxing authorities, including the Internal Revenue Service (“IRS”). The Company was previously under audit by the IRS for the years 2008 through 2010. The Company has been notified that the audit was completed and approved. In general, the Company is no longer subject to audit by the IRS, state and local or foreign taxing authorities for tax years prior to 2008. Various other taxing authorities are in the process of auditing income tax returns of the Company and its subsidiaries. The Company does not anticipate that any adjustments from the audits would have a material impact on its consolidated financial position, results of operations or cash flows.