Pension Benefits (Tables)

3 Months Ended

Jul. 31, 2013

Pension Benefits [Abstract]

Net Periodic Pension Cost

	Three Months Ended
	July 31,
(in thousands)	2013		2012
Interest cost	$	1,551	$	1,565
Expected return on plan assets		(1,778)		(1,641)
Recognized net actuarial loss		282		231
Net periodic pension cost	$	55	$	155