Income Taxes	6 Months Ended
Jan. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes On December 22, 2017, H.R.1, also known as the Tax Cuts and Jobs Act ("Tax Reform") was enacted in the U.S. Tax Reform significantly lowered the amount of our current and future income tax expense primarily due to the reduction in the U.S. statutory income tax rate from 35.0% to 21.0%. This provision went into effect on January 1, 2018 and required us to remeasure our deferred tax assets and liabilities. In fiscal 2019 and beyond, Tax Reform will result in the loss of our ability to take the domestic production activities deduction, which has been repealed, and is also likely to result in lower tax deductions for certain executive compensation expenses. For fiscal 2018, we will be subject to a 35.0% statutory income tax rate with respect to the period August 1, 2017 through December 31, 2017 and a 21.0% statutory income tax rate with respect to the period January 1, 2018 through July 31, 2018, or a blended statutory income tax rate for fiscal 2018 of approximately 27.0%. As such, our effective tax rate for accounting purposes in fiscal 2018, excluding discrete items, is now expected to approximate 27.75% as compared to our prior estimate of 34.5%. We expect to fully benefit from the lower statutory income tax rate in fiscal 2019 and thereafter. In connection with Tax Reform, during the three months ended January 31, 2018, we recorded an estimated net discrete tax benefit of $14,018,000, primarily related to the remeasurement of deferred tax liabilities associated with non-deductible amortization related to intangible assets. This remeasurement was recorded pursuant to ASC 740 "Income Taxes" and SEC Staff Accounting Bulletin ("SAB") 118, using estimates based on reasonable and supportable assumptions and available information as of the reporting date. As such, we expect to finalize this net discrete tax benefit during the second half of fiscal 2018. In addition, it is possible that the Internal Revenue Service ("IRS") will issue clarifying or interpretive guidance related to Tax Reform, which may ultimately result in a change to our estimated income tax. At January 31, 2018 and July 31, 2017, total unrecognized tax benefits were $9,043,000 and $8,681,000, respectively, including interest of $147,000 and $95,000, respectively. At January 31, 2018 and July 31, 2017, $2,558,000 and $2,515,000, respectively, of our unrecognized tax benefits were recorded as non-current income taxes payable in our Condensed Consolidated Balance Sheets. The remaining unrecognized tax benefits of $6,485,000 and $6,166,000 at January 31, 2018 and July 31, 2017, respectively, were presented as an offset to the associated non-current deferred tax assets in our Condensed Consolidated Balance Sheets. Of the total unrecognized tax benefits, $8,351,000 and $7,727,000, at January 31, 2018 and July 31, 2017, respectively, net of the reversal of the federal benefit recognized as a deferred tax asset relating to state reserves, excluding interest, would positively impact our effective tax rate, if recognized. Unrecognized tax benefits result from income tax positions taken or expected to be taken on our income tax returns for which a tax benefit has not been recorded in our condensed consolidated financial statements. Our policy is to recognize interest and penalties relating to uncertain tax positions in income tax expense. In November 2017, we received notification from the IRS that it will audit our federal income tax return for fiscal 2016. Our federal income tax return for fiscal 2015 is also subject to potential future IRS audit. None of our state income tax returns prior to fiscal 2013 are subject to audit. TCS’s federal income tax returns for tax years 2014 and 2015 and the tax period from January 1, 2016 to February 23, 2016 are subject to potential IRS audit. None of TCS’s state income tax returns prior to calendar year 2013 are subject to audit. The results of the IRS tax audit for fiscal 2016, future tax assessments or settlements could have a material adverse effect on our consolidated results of operations and financial condition.

Income Taxes

On December 22, 2017, H.R.1, also known as the Tax Cuts and Jobs Act ("Tax Reform") was enacted in the U.S. Tax Reform significantly lowered the amount of our current and future income tax expense primarily due to the reduction in the U.S. statutory income tax rate from 35.0% to 21.0%. This provision went into effect on January 1, 2018 and required us to remeasure our deferred tax assets and liabilities. In fiscal 2019 and beyond, Tax Reform will result in the loss of our ability to take the domestic production activities deduction, which has been repealed, and is also likely to result in lower tax deductions for certain executive compensation expenses.

For fiscal 2018, we will be subject to a 35.0% statutory income tax rate with respect to the period August 1, 2017 through December 31, 2017 and a 21.0% statutory income tax rate with respect to the period January 1, 2018 through July 31, 2018, or a blended statutory income tax rate for fiscal 2018 of approximately 27.0%. As such, our effective tax rate for accounting purposes in fiscal 2018, excluding discrete items, is now expected to approximate 27.75% as compared to our prior estimate of 34.5%. We expect to fully benefit from the lower statutory income tax rate in fiscal 2019 and thereafter.

In connection with Tax Reform, during the three months ended January 31, 2018, we recorded an estimated net discrete tax benefit of $14,018,000, primarily related to the remeasurement of deferred tax liabilities associated with non-deductible amortization related to intangible assets. This remeasurement was recorded pursuant to ASC 740 "Income Taxes" and SEC Staff Accounting Bulletin ("SAB") 118, using estimates based on reasonable and supportable assumptions and available information as of the reporting date. As such, we expect to finalize this net discrete tax benefit during the second half of fiscal 2018. In addition, it is possible that the Internal Revenue Service ("IRS") will issue clarifying or interpretive guidance related to Tax Reform, which may ultimately result in a change to our estimated income tax.

At January 31, 2018 and July 31, 2017, total unrecognized tax benefits were $9,043,000 and $8,681,000, respectively, including interest of $147,000 and $95,000, respectively. At January 31, 2018 and July 31, 2017, $2,558,000 and $2,515,000, respectively, of our unrecognized tax benefits were recorded as non-current income taxes payable in our Condensed Consolidated Balance Sheets. The remaining unrecognized tax benefits of $6,485,000 and $6,166,000 at January 31, 2018 and July 31, 2017, respectively, were presented as an offset to the associated non-current deferred tax assets in our Condensed Consolidated Balance Sheets. Of the total unrecognized tax benefits, $8,351,000 and $7,727,000, at January 31, 2018 and July 31, 2017, respectively, net of the reversal of the federal benefit recognized as a deferred tax asset relating to state reserves, excluding interest, would positively impact our effective tax rate, if recognized. Unrecognized tax benefits result from income tax positions taken or expected to be taken on our income tax returns for which a tax benefit has not been recorded in our condensed consolidated financial statements. Our policy is to recognize interest and penalties relating to uncertain tax positions in income tax expense.

In November 2017, we received notification from the IRS that it will audit our federal income tax return for fiscal 2016. Our federal income tax return for fiscal 2015 is also subject to potential future IRS audit. None of our state income tax returns prior to fiscal 2013 are subject to audit. TCS’s federal income tax returns for tax years 2014 and 2015 and the tax period from January 1, 2016 to February 23, 2016 are subject to potential IRS audit. None of TCS’s state income tax returns prior to calendar year 2013 are subject to audit. The results of the IRS tax audit for fiscal 2016, future tax assessments or settlements could have a material adverse effect on our consolidated results of operations and financial condition.