Pension Benefits (Tables)

6 Months Ended

Oct. 31, 2013

Pension Benefits [Abstract]

Net Periodic Pension Cost

	Three Months Ended				Six Months Ended
	October 31,				October 31,
(in thousands)	2013		2012		2013		2012
Interest cost	$	1,551	$	1,565	$	3,101	$	3,130
Expected return on plan assets		(1,778)		(1,641)		(3,556)		(3,282)
Recognized net actuarial loss		282		231		565		462
Net periodic pension cost	$	55	$	155	$	110	$	310