INCOME TAXES	9 Months Ended
Jun. 30, 2018
INCOME TAXES [Abstract]
INCOME TAXES	14. INCOME TAXES Our effective tax rate was 18.3% and 47.0% for the three and nine months ended June 30, 2018, respectively, compared to a 22.4% and 21.1% effective income tax rate for the three and nine months ended June 30, 2017. The significant increase in our effective tax rate for the nine months ended June 30, 2018 compared to the prior year is primarily driven by discrete adjustments related to the enactment of the Tax Act in the United States in December 2017. Other factors that impacted the Company's effective tax rate for the three and nine months ended June 30, 2018 were primarily related to benefits in excess of compensation cost from share based compensation recorded in the income statement (as opposed to equity prior to October 2017), the absence of benefits of a tax holiday in South Korea that expired as of October 2017, and benefits related to changes in prior year tax positions. The Tax Act includes broad and complex changes to the U.S. tax code, including but not limited to: (1) reducing the U.S. federal corporate income tax rate to 21% effective January 1, 2018; and (2) requiring a one-time transition tax on certain un-repatriated earnings of foreign subsidiaries that is payable over eight years. For fiscal 2018, we are recording our income tax provision using a blended U.S. statutory tax rate of 24.5%, which is based on a proration of the applicable tax rates before and after the Tax Act. The U.S. statutory tax rate of 21% will apply for fiscal 2019 and beyond. As a result of the Tax Act, the SEC staff issued accounting guidance that provides up to a one-year measurement period during which a company may complete its accounting for the impacts of the Tax Act (SAB 118). To the extent that a company's accounting for certain income tax effects of the Tax Act is incomplete but for which the company is able to determine a reasonable estimate, it must record a provisional estimate in its financial statements. If a company cannot determine a provisional estimate to be included in its financial statements, it should continue to apply the provisions of the tax laws that were in effect immediately before the enactment of the Tax Act. In connection with our initial analysis of the impact of the Tax Act, we recorded provisional discrete tax expense of $32,880 in the quarter ended December 31, 2017. During the second and third quarters of fiscal 2018, we recorded a reduction of $299 for a change in estimated withholding taxes and the re-measurement of U.S. deferred tax assets and liabilities. For various reasons that are discussed more fully below, we have not completed our accounting for the income tax effects of certain elements of the Tax Act, but we have recorded the following provisional estimates. Deemed Repatriation Transition Tax: The Deemed Repatriation Transition Tax (Transition Tax) is a tax on previously untaxed accumulated and current earnings and profits (E&P) of certain of our foreign subsidiaries. To determine the amount of the Transition Tax, we must determine, in addition to other factors, the amount of post-1986 E&P of the relevant subsidiaries, as well as the amount of non-U.S. withholding taxes on such earnings. We were able to make an initial estimate, and recorded $24,641 of provisional estimate of Transition Tax, which included U.S. federal and state tax implications, for the nine months ended June 30, 2018. Of this estimate, $22,450 was included in the other long-term liabilities as of June 30, 2018. In addition, we also recorded a provisional estimate of $6,126 for non-U.S. withholding taxes to be incurred on actual and future distributions of foreign earnings. We are monitoring U.S. federal and state legislative developments for further interpretative guidance and intend to continue to gather additional information, including an updated evaluation of our accumulated earnings and profits from foreign jurisdictions, to refine provisional estimates during the measurement period provided under SAB 118. Previously, the Company maintained an assertion to permanently reinvest the earnings of its non-U.S. subsidiaries outside of the U.S., with certain insignificant exceptions, and therefore, did not record U.S. deferred income taxes or foreign withholding taxes for these earnings. In light of the Tax Act and the associated transition to a territorial tax system the Company decided it will repatriate foreign earnings it expects to generate in the remainder of fiscal 2018, and consequently recorded deferred tax liabilities associated with withholding taxes on such planned distributions. Reduction of U.S. Federal Corporate Tax Rate: The Company re-measured its U.S. deferred tax assets and liabilities and recorded a discrete non-cash tax expense of $1,813 based on the rates at which the deferred tax assets and liabilities are expected to reverse in the future. We are still analyzing certain aspects of the Tax Act and the actual impact of the reduction in the U.S. federal corporate tax rate may be affected by the timing of the reversal of such balances. The Company is also analyzing other provisions of the Tax Act to determine their impact on the Company's effective tax rate in fiscal year 2018 or in the future, including the following: Global Intangible Low Taxed Income (GILTI): The Tax Act includes a provision designed to tax GILTI, which we are continuing to evaluate due to its complexity. Under U.S. GAAP, we are allowed to make an accounting policy choice of either: (1) treating taxes due on future U.S. inclusions in taxable income related to GILTI as a current-period expense when incurred (the "period cost method"); or, (2) factoring such amounts into a company's measurement of its deferred taxes (the "deferred method"). We are not yet able to reasonably estimate the effect of the GILTI provision, and have not made any adjustments related to potential GILTI tax in our financial statements. If applicable, GILTI tax would first apply to our fiscal year 2019, and would be accounted for as incurred under the period cost method. Base Erosion and Anti-Abuse Tax (BEAT): The Tax Act creates a new minimum BEAT liability for corporations that make base erosion payments if the corporation has sufficient gross receipts and derives a sufficient level of "base erosion tax benefits". We are further assessing the provisions of the BEAT, and will evaluate the effects on the Company's financial statements as further information becomes available. If applicable, any BEAT would first apply to the Company in fiscal year 2019, and would be accounted for as incurred under the period cost method. Foreign Derived Intangible Income (FDII): The Tax Act allows a domestic corporation an immediate deduction in U.S. taxable income for a portion of its FDII. The amount of the deduction will depend in part on the Company's U.S. taxable income. We are still assessing the benefits of the FDII deduction. If applicable, the FDII deduction would first be available to the Company in fiscal year 2019, and would be accounted for under the period cost method. The Company previously operated under a tax holiday in South Korea in fiscal years 2013 through 2017 in conjunction with our investment in research, development and manufacturing facilities there, which expired at the end of fiscal year 2017. This arrangement allowed for a tax at 50% of the local statutory rate in effect for fiscal years 2016 and 2017, following a 0% tax rate in fiscal years 2013, 2014 and 2015. This tax holiday reduced our income tax provision by approximately $3,094 and increased our diluted earnings per share by approximately $0.12 during the nine months ended June 30, 2017.

14. INCOME TAXES

Our effective tax rate was 18.3% and 47.0% for the three and nine months ended June 30, 2018, respectively, compared to a 22.4% and 21.1% effective income tax rate for the three and nine months ended June 30, 2017. The significant increase in our effective tax rate for the nine months ended June 30, 2018 compared to the prior year is primarily driven by discrete adjustments related to the enactment of the Tax Act in the United States in December 2017. Other factors that impacted the Company's effective tax rate for the three and nine months ended June 30, 2018 were primarily related to benefits in excess of compensation cost from share based compensation recorded in the income statement (as opposed to equity prior to October 2017), the absence of benefits of a tax holiday in South Korea that expired as of October 2017, and benefits related to changes in prior year tax positions.

The Tax Act includes broad and complex changes to the U.S. tax code, including but not limited to: (1) reducing the U.S. federal corporate income tax rate to 21% effective January 1, 2018; and (2) requiring a one-time transition tax on certain un-repatriated earnings of foreign subsidiaries that is payable over eight years. For fiscal 2018, we are recording our income tax provision using a blended U.S. statutory tax rate of 24.5%, which is based on a proration of the applicable tax rates before and after the Tax Act. The U.S. statutory tax rate of 21% will apply for fiscal 2019 and beyond.

As a result of the Tax Act, the SEC staff issued accounting guidance that provides up to a one-year measurement period during which a company may complete its accounting for the impacts of the Tax Act (SAB 118). To the extent that a company's accounting for certain income tax effects of the Tax Act is incomplete but for which the company is able to determine a reasonable estimate, it must record a provisional estimate in its financial statements. If a company cannot determine a provisional estimate to be included in its financial statements, it should continue to apply the provisions of the tax laws that were in effect immediately before the enactment of the Tax Act.

In connection with our initial analysis of the impact of the Tax Act, we recorded provisional discrete tax expense of $32,880 in the quarter ended December 31, 2017. During the second and third quarters of fiscal 2018, we recorded a reduction of $299 for a change in estimated withholding taxes and the re-measurement of U.S. deferred tax assets and liabilities. For various reasons that are discussed more fully below, we have not completed our accounting for the income tax effects of certain elements of the Tax Act, but we have recorded the following provisional estimates.

Deemed Repatriation Transition Tax: The Deemed Repatriation Transition Tax (Transition Tax) is a tax on previously untaxed accumulated and current earnings and profits (E&P) of certain of our foreign subsidiaries. To determine the amount of the Transition Tax, we must determine, in addition to other factors, the amount of post-1986 E&P of the relevant subsidiaries, as well as the amount of non-U.S. withholding taxes on such earnings. We were able to make an initial estimate, and recorded $24,641 of provisional estimate of Transition Tax, which included U.S. federal and state tax implications, for the nine months ended June 30, 2018. Of this estimate, $22,450 was included in the other long-term liabilities as of June 30, 2018. In addition, we also recorded a provisional estimate of $6,126 for non-U.S. withholding taxes to be incurred on actual and future distributions of foreign earnings. We are monitoring U.S. federal and state legislative developments for further interpretative guidance and intend to continue to gather additional information, including an updated evaluation of our accumulated earnings and profits from foreign jurisdictions, to refine provisional estimates during the measurement period provided under SAB 118. Previously, the Company maintained an assertion to permanently reinvest the earnings of its non-U.S. subsidiaries outside of the U.S., with certain insignificant exceptions, and therefore, did not record U.S. deferred income taxes or foreign withholding taxes for these earnings. In light of the Tax Act and the associated transition to a territorial tax system the Company decided it will repatriate foreign earnings it expects to generate in the remainder of fiscal 2018, and consequently recorded deferred tax liabilities associated with withholding taxes on such planned distributions.

Reduction of U.S. Federal Corporate Tax Rate: The Company re-measured its U.S. deferred tax assets and liabilities and recorded a discrete non-cash tax expense of $1,813 based on the rates at which the deferred tax assets and liabilities are expected to reverse in the future. We are still analyzing certain aspects of the Tax Act and the actual impact of the reduction in the U.S. federal corporate tax rate may be affected by the timing of the reversal of such balances.

The Company is also analyzing other provisions of the Tax Act to determine their impact on the Company's effective tax rate in fiscal year 2018 or in the future, including the following:

Global Intangible Low Taxed Income (GILTI): The Tax Act includes a provision designed to tax GILTI, which we are continuing to evaluate due to its complexity. Under U.S. GAAP, we are allowed to make an accounting policy choice of either: (1) treating taxes due on future U.S. inclusions in taxable income related to GILTI as a current-period expense when incurred (the "period cost method"); or, (2) factoring such amounts into a company's measurement of its deferred taxes (the "deferred method"). We are not yet able to reasonably estimate the effect of the GILTI provision, and have not made any adjustments related to potential GILTI tax in our financial statements. If applicable, GILTI tax would first apply to our fiscal year 2019, and would be accounted for as incurred under the period cost method.

Base Erosion and Anti-Abuse Tax (BEAT): The Tax Act creates a new minimum BEAT liability for corporations that make base erosion payments if the corporation has sufficient gross receipts and derives a sufficient level of "base erosion tax benefits". We are further assessing the provisions of the BEAT, and will evaluate the effects on the Company's financial statements as further information becomes available. If applicable, any BEAT would first apply to the Company in fiscal year 2019, and would be accounted for as incurred under the period cost method.

Foreign Derived Intangible Income (FDII): The Tax Act allows a domestic corporation an immediate deduction in U.S. taxable income for a portion of its FDII. The amount of the deduction will depend in part on the Company's U.S. taxable income. We are still assessing the benefits of the FDII deduction. If applicable, the FDII deduction would first be available to the Company in fiscal year 2019, and would be accounted for under the period cost method.

The Company previously operated under a tax holiday in South Korea in fiscal years 2013 through 2017 in conjunction with our investment in research, development and manufacturing facilities there, which expired at the end of fiscal year 2017. This arrangement allowed for a tax at 50% of the local statutory rate in effect for fiscal years 2016 and 2017, following a 0% tax rate in fiscal years 2013, 2014 and 2015. This tax holiday reduced our income tax provision by approximately $3,094 and increased our diluted earnings per share by approximately $0.12 during the nine months ended June 30, 2017.