Income Taxes	9 Months Ended
Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	16.Income Taxes The Company’s effective income tax rate, as calculated by dividing income tax expense by income before income taxes, was 24.1% for the first three quarters of 2018 and 34.8% for the first three quarters of 2017. The decrease in the effective tax rate was primarily driven by the corporate rate reduction due to the Tax Act and its impact on prior estimates and lower income before income taxes, which was offset by an increase in certain non-deductible expenses. The Company’s effective income tax rate, as calculated by dividing income tax expense by income before income taxes minus net income attributable to noncontrolling interest, was 32.5% for the first three quarters of 2018 and 38.8% for the first three quarters of 2017. Shortly after the Tax Act was enacted, the SEC issued guidance under Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (“SAB 118”) to address the application of GAAP and direct taxpayers to consider the impact of the Tax Act as “provisional” when a registrant does not have the necessary information available, prepared or analyzed (including computations) in reasonable detail to complete the accounting for the change in tax law. In accordance with SAB 118, the Company recognized a provisional tax benefit related to the re-measurement of its net deferred tax liability of $69.0 million as of December 31, 2017. During the third quarter of 2018, the Company recorded an additional provisional tax benefit of $1.9 million attributable to the re-measurement of its net deferred tax liability in connection with the filing of its 2017 federal income tax return. The ultimate impact may differ from the provisional amounts, possibly materially, due to, among other things, the significant complexity of the Tax Act, anticipated additional regulatory guidance or related interpretations that may be issued by the Internal Revenue Service (the “IRS”), changes in accounting standards, legislative actions, future actions by states within the U.S. and changes in estimates, analysis, interpretations and assumptions made by the Company. The Company had uncertain tax positions, including accrued interest, of $3.0 million on September 30, 2018 and $2.4 million on December 31, 2017, all of which would affect the Company’s effective tax rate if recognized. While it is expected the amount of uncertain tax positions may change in the next 12 months, the Company does not expect such change would have a significant impact on the consolidated condensed financial statements. Prior tax years beginning in year 2002 remain open to examination by the IRS, and various tax years beginning in year 1998 remain open to examination by certain state tax jurisdictions.

16.Income Taxes

The Company’s effective income tax rate, as calculated by dividing income tax expense by income before income taxes, was 24.1% for the first three quarters of 2018 and 34.8% for the first three quarters of 2017. The decrease in the effective tax rate was primarily driven by the corporate rate reduction due to the Tax Act and its impact on prior estimates and lower income before income taxes, which was offset by an increase in certain non-deductible expenses.

The Company’s effective income tax rate, as calculated by dividing income tax expense by income before income taxes minus net income attributable to noncontrolling interest, was 32.5% for the first three quarters of 2018 and 38.8% for the first three quarters of 2017.

Shortly after the Tax Act was enacted, the SEC issued guidance under Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (“SAB 118”) to address the application of GAAP and direct taxpayers to consider the impact of the Tax Act as “provisional” when a registrant does not have the necessary information available, prepared or analyzed (including computations) in reasonable detail to complete the accounting for the change in tax law. In accordance with SAB 118, the Company recognized a provisional tax benefit related to the re-measurement of its net deferred tax liability of $69.0 million as of December 31, 2017. During the third quarter of 2018, the Company recorded an additional provisional tax benefit of $1.9 million attributable to the re-measurement of its net deferred tax liability in connection with the filing of its 2017 federal income tax return.

The ultimate impact may differ from the provisional amounts, possibly materially, due to, among other things, the significant complexity of the Tax Act, anticipated additional regulatory guidance or related interpretations that may be issued by the Internal Revenue Service (the “IRS”), changes in accounting standards, legislative actions, future actions by states within the U.S. and changes in estimates, analysis, interpretations and assumptions made by the Company.

The Company had uncertain tax positions, including accrued interest, of $3.0 million on September 30, 2018 and $2.4 million on December 31, 2017, all of which would affect the Company’s effective tax rate if recognized. While it is expected the amount of uncertain tax positions may change in the next 12 months, the Company does not expect such change would have a significant impact on the consolidated condensed financial statements.

Prior tax years beginning in year 2002 remain open to examination by the IRS, and various tax years beginning in year 1998 remain open to examination by certain state tax jurisdictions.