Income Taxes	9 Months Ended
Jan. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective income tax rate for the three- and nine-month periods ended January 31, 2019 was 23.7% and 24.9%, respectively, compared with 47.0% and 33.9% in the comparable periods in the prior fiscal year. The decrease in the effective tax rate for both the third quarter and first nine months of fiscal 2019, as compared to the comparable periods in the prior fiscal year, was primarily due to a benefit from the reduction in the tax rate enacted in connection with the Tax Cuts and Jobs Act of 2017 (H.R. 1) (the “Tax Act”) from 35% to 21%. Additionally, the revaluation of deferred tax assets and nondeductible acquisition related expenses resulted in a higher effective tax rate in the comparable periods in the prior fiscal year. This was partially offset by the decrease of the benefit from stock-based compensation transactions and the repeal of the domestic production activities deduction by the Tax Act. During the first nine months of fiscal 2019 and 2018, the Company recognized an excess tax benefit related to stock-based compensation transactions of $0.7 million and $2.3 million, respectively. Comprehensive tax legislation enacted through the Tax Act on December 22, 2017 significantly modified U.S. corporate income tax law. In addition to its corporate income tax rate reduction, several other provisions of the Tax Act impacted the Company's financial statements and related disclosures for the year ended April 30, 2018 or will have an impact on taxes in future years. The Company recognized the income tax effects of the Tax Act in accordance with Staff Accounting Bulletin No. 118 (“SAB 118”) which provides SEC guidance on the application of ASC 740, Income Taxes, in the reporting period in which the Tax Act was signed into law. Accordingly, the Company’s financial statements as of April 30, 2018 reflected provisional amounts for those impacts for which the accounting under ASC 740 was incomplete, but a reasonable estimate could be determined. As of January 31, 2019, we consider the accounting for all impacts of the Tax Act complete. The Company recorded a provisional expense of $1.0 million related to the re-valuation of U.S. deferred taxes as of April 30, 2018. During the nine months ended January 31, 2019, the company recorded $0.3 million of additional expense related to our pension deferred tax liability. No other changes were made to the provisional estimate and no additional measurement period adjustments were recorded. As of April 30, 2018, the Company recorded a reduction in deferred tax assets related to executive compensation of $0.1 million. No further guidance on this provision of the Tax Act was issued by the IRS and no further adjustments were made during the quarter ended January 31, 2019.

Income Taxes

The effective income tax rate for the three- and nine-month periods ended January 31, 2019 was 23.7% and 24.9%, respectively, compared with 47.0% and 33.9% in the comparable periods in the prior fiscal year. The decrease in the effective tax rate for both the third quarter and first nine months of fiscal 2019, as compared to the comparable periods in the prior fiscal year, was primarily due to a benefit from the reduction in the tax rate enacted in connection with the Tax Cuts and Jobs Act of 2017 (H.R. 1) (the “Tax Act”) from 35% to 21%. Additionally, the revaluation of deferred tax assets and nondeductible acquisition related expenses resulted in a higher effective tax rate in the comparable periods in the prior fiscal year. This was partially offset by the decrease of the benefit from stock-based compensation transactions and the repeal of the domestic production activities deduction by the Tax Act. During the first nine months of fiscal 2019 and 2018, the Company recognized an excess tax benefit related to stock-based compensation transactions of $0.7 million and $2.3 million, respectively.

Comprehensive tax legislation enacted through the Tax Act on December 22, 2017 significantly modified U.S. corporate income tax law. In addition to its corporate income tax rate reduction, several other provisions of the Tax Act impacted the Company's financial statements and related disclosures for the year ended April 30, 2018 or will have an impact on taxes in future years.

The Company recognized the income tax effects of the Tax Act in accordance with Staff Accounting Bulletin No. 118 (“SAB 118”) which provides SEC guidance on the application of ASC 740, Income Taxes, in the reporting period in which the Tax Act was signed into law. Accordingly, the Company’s financial statements as of April 30, 2018 reflected provisional amounts for those impacts for which the accounting under ASC 740 was incomplete, but a reasonable estimate could be determined. As of January 31, 2019, we consider the accounting for all impacts of the Tax Act complete.

The Company recorded a provisional expense of $1.0 million related to the re-valuation of U.S. deferred taxes as of April 30, 2018. During the nine months ended January 31, 2019, the company recorded $0.3 million of additional expense related to our pension deferred tax liability. No other changes were made to the provisional estimate and no additional measurement period adjustments were recorded.

As of April 30, 2018, the Company recorded a reduction in deferred tax assets related to executive compensation of $0.1 million. No further guidance on this provision of the Tax Act was issued by the IRS and no further adjustments were made during the quarter ended January 31, 2019.