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Provision for Income Taxes
3 Months Ended
Oct. 31, 2017
Income Tax Disclosure [Abstract]  
Provision for Income Taxes
12. Provision for Income Taxes

The overall effective income tax rate for the three months ended October 31, 2017 was 31.4% compared with 32.0% for the three months ended October 31, 2016. The effective income tax rates for the fiscal 2018 and fiscal 2017 three-month periods were both favorably impacted by an income tax provision benefit related to stock-based compensation. The effective income tax rates for both three-month periods were also favorably impacted by various unrecognized tax benefit settlements and expirations.

The Company anticipates a decrease of approximately $2,730 in unrecognized tax benefits, and $370 in accrued interest related to unrecognized tax benefits recorded as of October 31, 2017, within the next 12 months from expected settlements or payments of uncertain tax positions and lapses of the applicable statutes of limitations. Actual results may differ from these estimates.

Generally, fiscal years 2015 and 2016 remain open for federal income tax purposes and fiscal years 2013, 2014, 2015 and 2016 remain open for state and Canadian income tax purposes. The Company and its subsidiaries file a consolidated U.S. federal income tax return and multiple state income tax returns. The Company is currently under examination by certain state authorities for the fiscal years ended July 31, 2013 through 2015. The Company believes it has adequately reserved for its exposure to additional payments for uncertain tax positions related to its state income tax returns in its liability for unrecognized tax benefits.