Annual report pursuant to Section 13 and 15(d)

Employee Stock Plans - Components of Stock-Based Compensation Expense Recognized (Detail)

v3.19.2
Employee Stock Plans - Components of Stock-Based Compensation Expense Recognized (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Apr. 30, 2017
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation expense, pre-tax $ 23,385 $ 21,469 $ 18,958
Tax benefit from stock-based compensation expense (5,155) (7,319) (4,756)
Total stock-based compensation expense, net of tax 18,230 14,150 14,202
Restricted Stock      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation expense, pre-tax 22,063 20,282 18,045
ESPP      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation expense, pre-tax $ 1,322 $ 1,187 $ 913