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Pension Benefits (Tables)
 9 Months Ended
Jan. 31, 2019
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]  
Net Periodic Pension (Benefit) Cost
Net periodic pension (benefit) cost consisted of the following for the three- and six-month periods ended January 31, 2019 and 2018: 
 

Three Months Ended

Nine Months Ended
 

January 31,

January 31,
(in thousands)

2019

2018

2019

2018
Interest cost

$
1,567


$
1,431


$
4,702


$
4,295

Expected return on plan assets

(2,127
)

(2,234
)

(6,382
)

(6,702
)
Recognized net actuarial loss

412


401


1,236


1,201














Net periodic pension benefit

$
(148
)

$
(402
)

$
(444
)

$
(1,206
)