Income Taxes	9 Months Ended
Jul. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We recorded income tax provisions of $168.9 million and $153.2 million for the nine months ended July 31, 2017 and 2016, respectively. The effective tax rate was 33.0% for the nine months ended July 31, 2017, compared to 36.4% for the nine months ended July 31, 2016. For the three months ended July 31, 2017 and 2016, we recorded an income tax provision of $55.0 million and $58.2 million, respectively. The effective tax rate for the three months ended July 31, 2017 was 27.0%, compared to 35.5% for the three months ended July 31, 2016. The income tax provisions for all periods included the provision for state income taxes and interest accrued on anticipated tax assessments, offset by tax benefits related to the utilization of domestic production activities deductions and other permanent differences. In addition, in the nine-month and three-month periods ended July 31, 2017, we recognized net benefits of $27.1 million and $27.9 million, respectively, associated primarily with the reversal of a state deferred tax asset valuation allowance. We currently operate in 20 states and are subject to various state tax jurisdictions. We estimate our state tax liability based upon the individual taxing authorities’ regulations, estimates of income by taxing jurisdiction, and our ability to utilize certain tax-saving strategies. We estimate our rate for the full fiscal year 2017 for state income taxes will be 7.3%. Our state income tax rate for the full fiscal year 2016 was 7.0%. At July 31, 2017, we had $26.6 million of gross unrecognized tax benefits, including interest and penalties. If these unrecognized tax benefits were to reverse in the future, they would have a beneficial impact on our effective tax rate at that time. During the next 12 months, it is reasonably possible that our unrecognized tax benefits will change, but we are not able to provide a range of such change. The possible changes would be principally due to the expiration of tax statutes, settlements with taxing jurisdictions, increases due to new tax positions taken, and the accrual of estimated interest and penalties.

Income Taxes

We recorded income tax provisions of $168.9 million and $153.2 million for the nine months ended July 31, 2017 and 2016, respectively. The effective tax rate was 33.0% for the nine months ended July 31, 2017, compared to 36.4% for the nine months ended July 31, 2016. For the three months ended July 31, 2017 and 2016, we recorded an income tax provision of $55.0 million and $58.2 million, respectively. The effective tax rate for the three months ended July 31, 2017 was 27.0%, compared to 35.5% for the three months ended July 31, 2016. The income tax provisions for all periods included the provision for state income taxes and interest accrued on anticipated tax assessments, offset by tax benefits related to the utilization of domestic production activities deductions and other permanent differences. In addition, in the nine-month and three-month periods ended July 31, 2017, we recognized net benefits of $27.1 million and $27.9 million, respectively, associated primarily with the reversal of a state deferred tax asset valuation allowance.

We currently operate in 20 states and are subject to various state tax jurisdictions. We estimate our state tax liability based upon the individual taxing authorities’ regulations, estimates of income by taxing jurisdiction, and our ability to utilize certain tax-saving strategies. We estimate our rate for the full fiscal year 2017 for state income taxes will be 7.3%. Our state income tax rate for the full fiscal year 2016 was 7.0%.

At July 31, 2017, we had $26.6 million of gross unrecognized tax benefits, including interest and penalties. If these unrecognized tax benefits were to reverse in the future, they would have a beneficial impact on our effective tax rate at that time. During the next 12 months, it is reasonably possible that our unrecognized tax benefits will change, but we are not able to provide a range of such change. The possible changes would be principally due to the expiration of tax statutes, settlements with taxing jurisdictions, increases due to new tax positions taken, and the accrual of estimated interest and penalties.