Income Taxes	9 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The Company’s tax provision for interim periods is determined using an estimate of the annual effective tax rate, adjusted for discrete items arising in that quarter. In each quarter, management updates the estimate of the annual effective tax rate, and any changes in the annual effective tax rate are recorded in a cumulative adjustment in that quarter. The quarterly tax provision and quarterly estimate of the annual effective tax rate are subject to significant volatility due to several factors, including management’s ability to accurately predict the portion of income (loss) before income taxes in multiple jurisdictions, the tax effects of our stock-based compensation awards, and the effects of acquisitions and the integration of those acquisitions. The annual effective tax rate differs from the U.S. statutory rate primarily due to state taxes. On December 22, 2017, the Tax Act was signed into law and was effective for the Company’s first quarter ending December 31, 2017. For the nine months ended June 30, 2018, the Company recorded an income tax provision of $2.3 million, which yielded an effective tax rate of negative 31%. Included in the tax provision is an expense of $4.4 million, which is related to the enactment of the Tax Act. As the Company has a fiscal year ending September 30th, it is subject to transitional tax rate rules. Therefore, a blended rate of 24.3% was computed as effective for the current fiscal year. The difference between the U.S. federal statutory tax rate and the Company’s effective tax rate for the nine months ended June 30, 2018 is primarily due to the impact of U.S. tax reform and the impact of certain permanent items on its tax provision. The Company adopted ASU 2016-09 prospectively as of October 1, 2017, resulting in net cumulative-effect adjustment of $8.3 million increase to retained earnings, primarily related to the recognition of the previously unrecognized excess tax benefits using the modified retrospective method. The previously unrecognized excess tax effects were recorded as an increase to deferred income taxes in the consolidated balance sheets.

INCOME TAXES

The Company’s tax provision for interim periods is determined using an estimate of the annual effective tax rate, adjusted for discrete items arising in that quarter. In each quarter, management updates the estimate of the annual effective tax rate, and any changes in the annual effective tax rate are recorded in a cumulative adjustment in that quarter. The quarterly tax provision and quarterly estimate of the annual effective tax rate are subject to significant volatility due to several factors, including management’s ability to accurately predict the portion of income (loss) before income taxes in multiple jurisdictions, the tax effects of our stock-based compensation awards, and the effects of acquisitions and the integration of those acquisitions. The annual effective tax rate differs from the U.S. statutory rate primarily due to state taxes.

On December 22, 2017, the Tax Act was signed into law and was effective for the Company’s first quarter ending December 31, 2017. For the nine months ended June 30, 2018, the Company recorded an income tax provision of $2.3 million, which yielded an effective tax rate of negative 31%. Included in the tax provision is an expense of $4.4 million, which is related to the enactment of the Tax Act.

As the Company has a fiscal year ending September 30th, it is subject to transitional tax rate rules. Therefore, a blended rate of 24.3% was computed as effective for the current fiscal year. The difference between the U.S. federal statutory tax rate and the Company’s effective tax rate for the nine months ended June 30, 2018 is primarily due to the impact of U.S. tax reform and the impact of certain permanent items on its tax provision.

The Company adopted ASU 2016-09 prospectively as of October 1, 2017, resulting in net cumulative-effect adjustment of $8.3 million increase to retained earnings, primarily related to the recognition of the previously unrecognized excess tax benefits using the modified retrospective method. The previously unrecognized excess tax effects were recorded as an increase to deferred income taxes in the consolidated balance sheets.