INCOME TAXES:	9 Months Ended
Dec. 31, 2017
Income Tax Disclosure [Abstract]
INCOME TAXES:	INCOME TAX: On December 22, 2017, the United States (“U.S.”) enacted significant changes to U.S. tax law following the passage of H.R.1, “An Act to Provide for Reconciliation Pursuant to Titles II and V of the Concurrent Resolution on the Budget for Fiscal Year 2018” (the “Tax Act”) (previously known as “The Tax Cuts and Jobs Act”). The Tax Act included significant changes to existing tax law, including a permanent reduction to the U.S. federal corporate income tax rate from 35% to 21%, a one-time repatriation tax on deferred foreign income (“Transition Tax”), and numerous other changes to business-related deductions. The permanent reduction to the U.S. federal corporate income tax rate from 35% to 21% is effective January 1, 2018 (the “Effective Date”). Because the Effective Date does not fall on the first day of our fiscal year, we are required to apply a blended tax rate for the entire fiscal year by applying a prorated percentage of the number of days before and after the Effective Date. As a result of the Tax Act, we have determined that our U.S. federal statutory corporate income tax rate will be 31.5% for the fiscal year ending March 31, 2018. We recorded a $20.3 million benefit for the remeasurement of net deferred tax liabilities, which was included in income tax expense (benefit) in the Company's Condensed Consolidated Statements of Operations. We remeasured our deferred taxes to reflect the reduced Federal tax rate that will apply when these deferred taxes are settled or realized in future periods. To calculate the remeasurement of deferred taxes we estimated the periods during which the existing deferred taxes will be settled or realized. The remeasurement of deferred taxes included in our condensed consolidated financial statements will be subject to further revisions if our current estimates are different from our actual future operating results. Given the Company's aggregate deficit related to foreign earnings and profits, we have determined that the Company will not incur a Transition Tax liability. On December 22, 2017, the SEC issued Staff Accounting Bulletin 118 (“SAB 118”) which provides guidance on accounting for the tax effects of the Tax Act. The SEC staff (the “Staff”) recognized that a registrant’s review of certain income tax effects of the Tax Act may be incomplete at the time financial statements are issued for the reporting period that includes the enactment date, including interim periods therein. If a company does not have the necessary information available, prepared or analyzed for certain income tax effects of the Tax Act, SAB 118 allows a company to report provisional numbers and adjust those amounts during the measurement period not to extend beyond one year. The adjustments to net deferred tax liabilities are provisional amounts estimated based on information available as of December 31, 2017. These amounts are subject to change as we obtain information necessary to complete the calculations. We will recognize any changes to the provisional amounts as we refine our estimates of the cumulative temporary differences, including those related to immediate deduction for qualified property, and our interpretations of the application of the Tax Act. We continue to review the anticipated impacts of the global intangible low taxed income (“GILTI”) and base erosion anti-abuse tax (“BEAT”) on the Company, which are not effective until fiscal year 2019. The Company has not recorded any impact associated with either GILTI or BEAT in the tax rate for the third quarter of fiscal year 2018. Within the calculation of its annual effective tax rate the Company has used assumptions and estimates that may change as a result of future guidance, interpretation, and rule-making from the Internal Revenue Service, the SEC, and the FASB and/or various other taxing jurisdictions. For example, the Company anticipates that the U.S. state jurisdictions will continue to determine and announce their conformity to the Tax Act, which could have an impact on the annual effective tax rate. In determining the quarterly provision for income taxes, the Company makes its best estimate of the effective income tax rate expected to be applicable for the full fiscal year. The estimated effective income tax rate for the current fiscal year is impacted by nondeductible stock-based compensation, state income taxes, research tax credits, and losses in foreign jurisdictions. State income taxes are influenced by the geographic and legal entity mix of the Company’s U.S. income as well as the diversity of rules among the states. The Company does not record a tax benefit for certain foreign losses due to uncertainty of future utilization. As a result of adopting ASU 2016–09 during the first quarter of the current fiscal year, all excess tax benefits and deficiencies from stock–based compensation are recognized as income tax benefit and expense in the Company’s Condensed Consolidated Statement of Operations in the reporting period in which they occur. For the three months and nine months ended December 31, 2017, the Company recognized discrete income tax expense of $0.1 million and benefit of $1.9 million, respectively, related to net excess tax benefits and deficiencies.

INCOME TAX:

On December 22, 2017, the United States (“U.S.”) enacted significant changes to U.S. tax law following the passage of H.R.1, “An Act to Provide for Reconciliation Pursuant to Titles II and V of the Concurrent Resolution on the Budget for Fiscal Year 2018” (the “Tax Act”) (previously known as “The Tax Cuts and Jobs Act”). The Tax Act included significant changes to existing tax law, including a permanent reduction to the U.S. federal corporate income tax rate from 35% to 21%, a one-time repatriation tax on deferred foreign income (“Transition Tax”), and numerous other changes to business-related deductions.

The permanent reduction to the U.S. federal corporate income tax rate from 35% to 21% is effective January 1, 2018 (the “Effective Date”). Because the Effective Date does not fall on the first day of our fiscal year, we are required to apply a blended tax rate for the entire fiscal year by applying a prorated percentage of the number of days before and after the Effective Date. As a result of the Tax Act, we have determined that our U.S. federal statutory corporate income tax rate will be 31.5% for the fiscal year ending March 31, 2018.

We recorded a $20.3 million benefit for the remeasurement of net deferred tax liabilities, which was included in income tax expense (benefit) in the Company's Condensed Consolidated Statements of Operations. We remeasured our deferred taxes to reflect the reduced Federal tax rate that will apply when these deferred taxes are settled or realized in future periods. To calculate the remeasurement of deferred taxes we estimated the periods during which the existing deferred taxes will be settled or realized. The remeasurement of deferred taxes included in our condensed consolidated financial statements will be subject to further revisions if our current estimates are different from our actual future operating results.

Given the Company's aggregate deficit related to foreign earnings and profits, we have determined that the Company will not incur a Transition Tax liability.

On December 22, 2017, the SEC issued Staff Accounting Bulletin 118 (“SAB 118”) which provides guidance on accounting for the tax effects of the Tax Act. The SEC staff (the “Staff”) recognized that a registrant’s review of certain income tax effects of the Tax Act may be incomplete at the time financial statements are issued for the reporting period that includes the enactment date, including interim periods therein. If a company does not have the necessary information available, prepared or analyzed for certain income tax effects of the Tax Act, SAB 118 allows a company to report provisional numbers and adjust those amounts during the measurement period not to extend beyond one year. The adjustments to net deferred tax liabilities are provisional amounts estimated based on information available as of December 31, 2017. These amounts are subject to change as we obtain information necessary to complete the calculations. We will recognize any changes to the provisional amounts as we refine our estimates of the cumulative temporary differences, including those related to immediate deduction for qualified property, and our interpretations of the application of the Tax Act.

We continue to review the anticipated impacts of the global intangible low taxed income (“GILTI”) and base erosion anti-abuse tax (“BEAT”) on the Company, which are not effective until fiscal year 2019. The Company has not recorded any impact associated with either GILTI or BEAT in the tax rate for the third quarter of fiscal year 2018.

Within the calculation of its annual effective tax rate the Company has used assumptions and estimates that may change as a result of future guidance, interpretation, and rule-making from the Internal Revenue Service, the SEC, and the FASB and/or various other taxing jurisdictions. For example, the Company anticipates that the U.S. state jurisdictions will continue to determine and announce their conformity to the Tax Act, which could have an impact on the annual effective tax rate.

In determining the quarterly provision for income taxes, the Company makes its best estimate of the effective income tax rate expected to be applicable for the full fiscal year. The estimated effective income tax rate for the current fiscal year is impacted by nondeductible stock-based compensation, state income taxes, research tax credits, and losses in foreign jurisdictions. State income taxes are influenced by the geographic and legal entity mix of the Company’s U.S. income as well as the diversity of rules among the states. The Company does not record a tax benefit for certain foreign losses due to uncertainty of future utilization.

As a result of adopting ASU 2016–09 during the first quarter of the current fiscal year, all excess tax benefits and deficiencies from stock–based compensation are recognized as income tax benefit and expense in the Company’s Condensed Consolidated Statement of Operations in the reporting period in which they occur. For the three months and nine months ended December 31, 2017, the Company recognized discrete income tax expense of $0.1 million and benefit of $1.9 million, respectively, related to net excess tax benefits and deficiencies.