Income Taxes	6 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective income tax rate was 8.0% for the three months ended June 30, 2018 and 4.3% for the six months ended June 30, 2018. In comparison, the effective income tax rate was 17.1% for the three months ended June 30, 2017 and 17.5% for the six months ended June 30, 2017. The benefit from income taxes varies from the amount computed by applying the federal corporate income tax rate of 21.0% and 35.0% for 2018 and 2017, respectively, to the loss before income taxes primarily due to state income taxes (net of federal tax effect) and adjustments for permanent differences (primarily the non-deductible interest expense associated with the Company's preferred stock). In determining the benefit from income taxes, the Company applied an estimated annual effective tax rate to its ordinary operating results, and calculated the tax benefit or provision, if any, of other discrete items individually as they occurred. The estimated annual effective tax rate was based on expected ordinary operating results, statutory tax rates, and the Company's best estimate of non-deductible and non-taxable items of ordinary income and expense.

Income Taxes

6 Months Ended

Jun. 30, 2018

The effective income tax rate was 8.0% for the three months ended June 30, 2018 and 4.3% for the six months ended June 30, 2018. In comparison, the effective income tax rate was 17.1% for the three months ended June 30, 2017 and 17.5% for the six months ended June 30, 2017. The benefit from income taxes varies from the amount computed by applying the federal corporate income tax rate of 21.0% and 35.0% for 2018 and 2017, respectively, to the loss before income taxes primarily due to state income taxes (net of federal tax effect) and adjustments for permanent differences (primarily the non-deductible interest expense associated with the Company's preferred stock). In determining the benefit from income taxes, the Company applied an estimated annual effective tax rate to its ordinary operating results, and calculated the tax benefit or provision, if any, of other discrete items individually as they occurred. The estimated annual effective tax rate was based on expected ordinary operating results, statutory tax rates, and the Company's best estimate of non-deductible and non-taxable items of ordinary income and expense.