Pension Benefits (Tables)

6 Months Ended

Oct. 31, 2016

Pension and Other Postretirement Benefit Expense [Abstract]

Net Periodic Pension (Benefit) Cost

Net periodic pension (benefit) cost consisted of the following for the three- and six-month periods ended October 31, 2016 and 2015: 

	Three Months Ended						Six Months Ended
	October 31,						October 31,
(in thousands)	2016			2015			2016			2015
Interest cost	$	1,443		$	1,753		$	2,886		$	3,507
Expected return on plan assets	(2,019		)	(2,035		)	(4,039		)	(4,071		)
Recognized net actuarial loss	442			353			885			706
Net periodic pension (benefit) cost	$	(134	)	$	71		$	(268	)	$	142