Income Taxes	6 Months Ended
Jun. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company's effective income tax rate was 36.2% and 38.4% for the three months ended June 30, 2013 and 2012, respectively, and 36.3% and 36.2% for the six months ended June 30, 2013 and 2012, respectively. For the three months ended June 30, 2013, the Company's effective tax rate differed from the U.S. federal statutory rate primarily due to state income taxes. The effective tax rate for the three months ended June 30, 2012 differed from the U.S. federal statutory rate primarily due to state income taxes and non-deductible expenses, primarily equity-based compensation and meals and entertainment. The non-deductible expenses had a greater impact on the effective tax rate for the three months ended June 30, 2012 than for the three months ended June 30, 2013. For the six months ended June 30, 2013, the Company's effective tax rate differed from the U.S. federal statutory rate primarily due to state income taxes. The effective tax rate for the six months ended June 30, 2012 also differed from the U.S. federal statutory rate primarily due to state income taxes. While the non-deductible expenses had a greater impact on the effective tax rate for the six months ended June 30, 2012 than for the six months ended June 30, 2013, the effect was offset by additional state tax credits that were recorded in the first three months 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”). In general, the Company is no longer subject to audit by the IRS for tax years through 2010 and state, local or foreign taxing authorities for tax years through 2007. Various 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

6 Months Ended

Jun. 30, 2013

The Company's effective income tax rate was 36.2% and 38.4% for the three months ended June 30, 2013 and 2012, respectively, and 36.3% and 36.2% for the six months ended June 30, 2013 and 2012, respectively.

For the three months ended June 30, 2013, the Company's effective tax rate differed from the U.S. federal statutory rate primarily due to state income taxes. The effective tax rate for the three months ended June 30, 2012 differed from the U.S. federal statutory rate primarily due to state income taxes and non-deductible expenses, primarily equity-based compensation and meals and entertainment. The non-deductible expenses had a greater impact on the effective tax rate for the three months ended June 30, 2012 than for the three months ended June 30, 2013.

For the six months ended June 30, 2013, the Company's effective tax rate differed from the U.S. federal statutory rate primarily due to state income taxes. The effective tax rate for the six months ended June 30, 2012 also differed from the U.S. federal statutory rate primarily due to state income taxes. While the non-deductible expenses had a greater impact on the effective tax rate for the six months ended June 30, 2012 than for the six months ended June 30, 2013, the effect was offset by additional state tax credits that were recorded in the first three months 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”). In general, the Company is no longer subject to audit by the IRS for tax years through 2010 and state, local or foreign taxing authorities for tax years through 2007. Various 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.