Income Taxes	6 Months Ended
Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The provision for income taxes was $26.2 million for the three months ended June 30, 2014 compared to $25.0 million in the three months ended June 30, 2013. The effective income tax rate was 33.1% for the three months ended June 30, 2014 and 35.0% for the same period in 2013. The quarter-over-quarter decrease in the effective income tax rate was primarily due to a favorable shift in the estimated annual mix of pre-tax income by jurisdiction as well as the recognition of previously unrecognized federal and state income tax benefits in the second quarter of 2014. The provision for income taxes was $45.2 million for the six months ended June 30, 2014 compared to $40.2 million in the six months ended June 30, 2013. The effective income tax rate was 33.2% for the six months ended June 30, 2014 and 32.6% for the same period in 2013. The increase in the effective income tax rate was primarily due to a favorable retroactive tax law change enacted in the first quarter of 2013, which was partially offset by a favorable shift in the estimated annual mix of pre-tax income by jurisdiction in 2014. As of June 30, 2014 and December 31, 2013, the Company had gross unrecognized tax benefits of $17.4 million and $14.5 million, respectively. It is reasonably possible that gross unrecognized tax benefits will decrease by approximately $4.0 million within the next 12 months, due to the anticipated closure of audits and the expiration of certain statutes of limitation. These unrecognized tax benefits relate primarily to the utilization of tax attributes, as well as certain other unrecognized tax positions, each of which are individually insignificant. In 2013, the Internal Revenue Service commenced an audit of the Company's federal income tax returns for the 2010 and 2011 tax years. Although the final resolution of these audits is uncertain, the Company believes the ultimate disposition will not have a material adverse effect on its consolidated financial position, cash flows, or results of operations.

Income Taxes

6 Months Ended

Jun. 30, 2014

The provision for income taxes was $26.2 million for the three months ended June 30, 2014 compared to $25.0 million in the three months ended June 30, 2013. The effective income tax rate was 33.1% for the three months ended June 30, 2014 and 35.0% for the same period in 2013. The quarter-over-quarter decrease in the effective income tax rate was primarily due to a favorable shift in the estimated annual mix of pre-tax income by jurisdiction as well as the recognition of previously unrecognized federal and state income tax benefits in the second quarter of 2014.

The provision for income taxes was $45.2 million for the six months ended June 30, 2014 compared to $40.2 million in the six months ended June 30, 2013. The effective income tax rate was 33.2% for the six months ended June 30, 2014 and 32.6% for the same period in 2013. The increase in the effective income tax rate was primarily due to a favorable retroactive tax law change enacted in the first quarter of 2013, which was partially offset by a favorable shift in the estimated annual mix of pre-tax income by jurisdiction in 2014.

As of June 30, 2014 and December 31, 2013, the Company had gross unrecognized tax benefits of $17.4 million and $14.5 million, respectively. It is reasonably possible that gross unrecognized tax benefits will decrease by approximately $4.0 million within the next 12 months, due to the anticipated closure of audits and the expiration of certain statutes of limitation. These unrecognized tax benefits relate primarily to the utilization of tax attributes, as well as certain other unrecognized tax positions, each of which are individually insignificant.

In 2013, the Internal Revenue Service commenced an audit of the Company's federal income tax returns for the 2010 and 2011 tax years. Although the final resolution of these audits is uncertain, the Company believes the ultimate disposition will not have a material adverse effect on its consolidated financial position, cash flows, or results of operations.