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Pension Benefits (Tables)
 3 Months Ended
Jul. 31, 2017
Pension and Other Postretirement Benefit Expense [Abstract]  
Net Periodic Pension (Benefit) Cost
Net periodic pension (benefit) cost consisted of the following for the three-month periods ended July 31, 2017 and 2016: 
 

Three Months Ended

 

July 31,

(in thousands)

2017

2016

Interest cost

$
1,432


$
1,443


Expected return on plan assets

(2,234
)

(2,020
)

Recognized net actuarial loss

400


443










Net periodic pension (benefit) cost

$
(402
)

$
(134
)