Pension Benefits (Tables)

6 Months Ended

Oct. 31, 2015

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, 2015 and 2014: 

	Three Months Ended						Six Months Ended
	October 31,						October 31,
(in thousands)	2015			2014			2015			2014
Interest cost	$	1,753		$	1,617		$	3,507		$	3,233
Expected return on plan assets	(2,035		)	(1,917		)	(4,071		)	(3,833		)
Recognized net actuarial loss	353			216			706			433
Net periodic pension (benefit) cost	$	71		$	(84	)	$	142		$	(167	)