Annual report pursuant to Section 13 and 15(d)

Financial Instruments - Financial Instruments and Balance Sheet Classification (Detail)

v3.20.2
Financial Instruments - Financial Instruments and Balance Sheet Classification (Detail) - USD ($)
$ in Thousands
Apr. 30, 2020
Apr. 30, 2019
Investment Holdings [Line Items]    
Cash and cash equivalents $ 689,244 $ 626,360
Marketable Securities, Current 41,951 8,288
Marketable securities, non-current 132,134 132,463
Income Taxes & Other Receivables 38,755 26,767
Income Taxes & Other Receivables 2,634 718
Fair Value 865,963 767,829
Fair Value, Inputs, Level 1 | Money Market Funds    
Investment Holdings [Line Items]    
Cash and cash equivalents 71,763 46,362
Fair Value 71,763 46,362
Fair Value, Inputs, Level 1 | Mutual Funds    
Investment Holdings [Line Items]    
Marketable Securities, Current [1] 9,278 8,288
Marketable securities, non-current [1] 132,134 132,463
Fair Value [1] 141,412 140,751
Fair Value, Inputs, Level 1 | Equity Securities    
Investment Holdings [Line Items]    
Marketable Securities, Current 9,278 8,288
Marketable securities, non-current 132,134 132,463
Fair Value 141,412 140,751
Fair Value, Inputs, Level 1 | Cash    
Investment Holdings [Line Items]    
Cash and cash equivalents 611,795 579,998
Fair Value 611,795 579,998
Fair Value, Inputs, Level 2    
Investment Holdings [Line Items]    
Cost 38,313  
Unrealized Gains 65  
Unrealized Losses (19)  
Fair Value 38,359  
Cash and cash equivalents 5,686  
Marketable Securities, Current 32,673  
Fair Value, Inputs, Level 2 | Commercial Paper    
Investment Holdings [Line Items]    
Cost 19,132  
Unrealized Gains 39  
Fair Value 19,171  
Cash and cash equivalents 4,785  
Marketable Securities, Current 14,386  
Fair Value, Inputs, Level 2 | Corporate Notes/Bonds    
Investment Holdings [Line Items]    
Cost 19,181  
Unrealized Gains 26  
Unrealized Losses (19)  
Fair Value 19,188  
Cash and cash equivalents 901  
Marketable Securities, Current 18,287  
Fair Value, Inputs, Level 2 | Foreign Exchange Forward Contracts    
Investment Holdings [Line Items]    
Income Taxes & Other Receivables 2,634 99
Fair Value $ 2,634 99
Fair Value, Inputs, Level 2 | Interest Rate Swap    
Investment Holdings [Line Items]    
Income Taxes & Other Receivables   619
Unrealized Gains   619
Fair Value   $ 619
[1] These investments are held in trust for settlement of the Company’s vested obligations of $124.6 million and $122.3 million as of April 30, 2020 and 2019, respectively, under the ECAP (see Note 6 — Deferred Compensation and Retirement Plans). Unvested obligations under the deferred compensation plans totaled $21.7 million and $24.6 million as of April 30, 2020 and 2019, respectively. During fiscal 2020, the fair value of the investments decreased; therefore, the Company recognized loss of $1.8 million, which was recorded in other (loss) income, net. During fiscal 2019 and 2018, the fair value of the investments increased; therefore, the Company recognized income of $8.1 million, and $10.3 million, respectively, which was recorded in other (loss) income, net.