Annual report pursuant to Section 13 and 15(d)

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

v3.19.2
Financial Instruments - Financial Instruments and Balance Sheet Classification (Detail) - USD ($)
$ in Thousands
Apr. 30, 2019
Apr. 30, 2018
Apr. 30, 2017
Apr. 30, 2016
Investment Holdings [Line Items]        
Cash and cash equivalents $ 626,360 $ 520,848 $ 410,882 $ 273,252
Marketable Securities, Current 8,288 14,293    
Marketable securities, non-current 132,463 122,792    
Income Taxes & Other Receivables 26,767 29,089    
Fair Value, Inputs, Level 1        
Investment Holdings [Line Items]        
Cost 761,799 647,925    
Unrealized Gains 6,301 11,040    
Unrealized Losses (989) (1,032)    
Fair Value 767,111 657,933    
Cash and cash equivalents 626,360 520,848    
Marketable Securities, Current 8,288 14,293    
Marketable securities, non-current 132,463 122,792    
Fair Value, Inputs, Level 1 | Cash        
Investment Holdings [Line Items]        
Cost 579,998 519,818    
Fair Value 579,998 519,818    
Cash and cash equivalents 579,998 519,818    
Fair Value, Inputs, Level 1 | Money Market Funds        
Investment Holdings [Line Items]        
Cost 46,362 1,030    
Fair Value 46,362 1,030    
Cash and cash equivalents 46,362 1,030    
Fair Value, Inputs, Level 1 | Mutual Funds        
Investment Holdings [Line Items]        
Cost [1] 135,439 127,077    
Unrealized Gains [1] 6,301 11,040    
Unrealized Losses [1] (989) (1,032)    
Fair Value [1] 140,751 137,085    
Marketable Securities, Current [1] 8,288 14,293    
Marketable securities, non-current [1] 132,463 122,792    
Fair Value, Inputs, Level 2 | Foreign Exchange Forward Contracts        
Investment Holdings [Line Items]        
Unrealized Gains 821 1,778    
Unrealized Losses (722) (1,025)    
Fair Value 99 753    
Income Taxes & Other Receivables 99 753    
Fair Value, Inputs, Level 2 | Interest Rate Swap        
Investment Holdings [Line Items]        
Fair Value 619 2,076    
Income Taxes & Other Receivables 619 2,076    
Unrealized Gains $ 619 $ 2,076    
[1] These investments are held in trust for settlement of the Company’s vested obligations of $122.3 million and $118.2 million as of April 30, 2019 and 2018, respectively, under the ECAP (see Note 6 — Deferred Compensation and Retirement Plans). Unvested obligations under the deferred compensation plans totaled $24.6 million and $29.5 million as of April 30, 2019 and 2018, respectively. During fiscal 2019, 2018, and 2017, the fair value of the investments increased; therefore, the Company recognized income of $8.1 million, $10.3 million, and $10.8 million, respectively, which was recorded in other income, net.