Annual report pursuant to Section 13 and 15(d)

Segments - Long Lived Assets, Excluding Financial Instruments and Tax Assets, Classified by Controlling Countries over Ten Percent (Detail)

v3.20.2
Segments - Long Lived Assets, Excluding Financial Instruments and Tax Assets, Classified by Controlling Countries over Ten Percent (Detail) - USD ($)
$ in Thousands
Apr. 30, 2020
Apr. 30, 2019
Apr. 30, 2018
Segment Reporting Information [Line Items]      
Long-lived assets $ 337,805 $ 131,505 $ 119,901
UNITED STATES      
Segment Reporting Information [Line Items]      
Long-lived assets [1] 169,928 98,455 80,424
United Kingdom      
Segment Reporting Information [Line Items]      
Long-lived assets 35,739 6,466 7,792
Other Countries      
Segment Reporting Information [Line Items]      
Long-lived assets $ 132,138 $ 26,584 $ 31,685
[1] Includes Corporate long-lived assets