Income Taxes	9 Months Ended
Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Effective Tax Rate. Interim period income taxes are computed by applying an anticipated annual effective tax rate to year-to-date income or loss, except for significant unusual or infrequently occurring items, which are recorded in the period in which they occur. Changes in tax laws or rates are recorded in the period they are enacted. For the quarter and nine months ended September 30, 2015, our effective tax rates were 35% and 42%, respectively. Our effective tax rate for the nine months ended September 30, 2015 differs from the statutory rate primarily as a result of the effects of state income taxes (net of federal income tax effects) relative to our level of pre-tax book income (loss). Our effective tax rates for the quarter and nine months ended September 30, 2014 were 38% and 42%, respectively, and differed from the statutory rate as a result of the tax effects of state income taxes, non-deductible compensation expense and certain transaction costs related to our initial public offering. Generally, the Company's and certain subsidiaries’ income tax years remain open and subject to examination by both federal and state tax authorities. In the third quarter of 2015, we were notified of an IRS examination of one of our subsidiary’s 2013 U.S. tax return.

Income Taxes

9 Months Ended

Sep. 30, 2015

Effective Tax Rate. Interim period income taxes are computed by applying an anticipated annual effective tax rate to year-to-date income or loss, except for significant unusual or infrequently occurring items, which are recorded in the period in which they occur. Changes in tax laws or rates are recorded in the period they are enacted.

For the quarter and nine months ended September 30, 2015, our effective tax rates were 35% and 42%, respectively. Our effective tax rate for the nine months ended September 30, 2015 differs from the statutory rate primarily as a result of the effects of state income taxes (net of federal income tax effects) relative to our level of pre-tax book income (loss). Our effective tax rates for the quarter and nine months ended September 30, 2014 were 38% and 42%, respectively, and differed from the statutory rate as a result of the tax effects of state income taxes, non-deductible compensation expense and certain transaction costs related to our initial public offering. Generally, the Company's and certain subsidiaries’ income tax years remain open and subject to examination by both federal and state tax authorities. In the third quarter of 2015, we were notified of an IRS examination of one of our subsidiary’s 2013 U.S. tax return.