Annual report pursuant to Section 13 and 15(d)

Summary of Losses on Interest Rate Swap (Parenthetical) (Detail)

v3.7.0.1
Summary of Losses on Interest Rate Swap (Parenthetical) (Detail)
$ in Thousands
12 Months Ended
Apr. 30, 2017
USD ($)
Derivative [Line Items]  
Losses recognized in OCI, tax effects $ 406
Interest Rate Swap  
Derivative [Line Items]  
Losses recognized in OCI, tax effects $ 406