Pension Benefits (Tables)

3 Months Ended

Jul. 31, 2012

Pension Benefits [Abstract]

Net Periodic Pension Cost

	Three Months Ended
	July 31,
(in thousands)	2012		2011
Service cost	$	0	$	1,283
Interest cost		1,565		1,676
Expected return on plan assets		(1,641)		(1,656)
Amortization of net loss		231		522
Amortization of prior service cost		0		20
Net periodic pension cost	$	155	$	1,845