Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Schedule of Long-term Debt, at Amortized Cost (Detail)

v3.20.2
Long-Term Debt - Schedule of Long-term Debt, at Amortized Cost (Detail) - USD ($)
$ in Thousands
Apr. 30, 2020
Apr. 30, 2019
Debt Instrument [Line Items]    
Long-term borrowings, net of unamortized discount and debt issuance costs $ 394,144 $ 222,878
4.625% Senior Unsecured Notes due 2027    
Debt Instrument [Line Items]    
Less: Unamortized discount and issuance costs (5,856) (3,997)
Long-term borrowings, net of unamortized discount and debt issuance costs 394,144 222,878
4.625% Senior Unsecured Notes due 2027 | Revolving Credit Facility    
Debt Instrument [Line Items]    
Long-term debt   $ 226,875
4.625% Senior Unsecured Notes due 2027 | Senior Unsecured Notes    
Debt Instrument [Line Items]    
Long-term debt $ 400,000