Employee Pension Plans (Tables)

6 Months Ended

Nov. 30, 2011

Employee Pension Plans [Abstract]

Components Of Net Periodic Pension Cost For Defined Benefit Plans

	Three Months Ended November 30,						Six Months Ended November 30,
(in thousands)	2011			2010			2011			2010
Defined benefit plans:
Service cost	$	65		$	239		$	134		$	473
Interest cost		376			358			756			712
Expected return on plan assets		(408	)		(333	)		(815	)		(666	)
Net amortization and deferral		43			64			86			128
Net pension cost of defined benefit plans	$	76		$	328		$	161		$	647