Employee Pension Plans (Tables)

9 Months Ended

Feb. 29, 2012

Employee Pension Plans [Abstract]

Components Of Net Periodic Pension Cost For Defined Benefit Plans

	Three Months Ended						Nine Months Ended
(in thousands)	February 29, 2012			February 28, 2011			February 29, 2012			February 28, 2011
Defined benefit plans:
Service cost	$	65		$	238		$	198		$	711
Interest cost		376			358			1,132			1,070
Expected return on plan assets		(408	)		(333	)		(1,222	)		(999	)
Net amortization and deferral		43			64			129			192
Net pension cost of defined benefit plans	$	76		$	327		$	237		$	974