Employee Benefit Plans

3 Months Ended

Apr. 30, 2011

Employee Benefit Plans [Abstract]

EMPLOYEE BENEFIT PLANS

10. EMPLOYEE BENEFIT PLANS

The Company maintains several pension and retirement plans, and also provides certain health-care and life insurance benefits.

Net periodic pension and other postretirement benefit expense included the following components:

	Three Months Ended April 30,
							Other
	Pension Benefits						Postretirement Benefits
(in thousands)	2011			2010			2011			2010
Net Periodic Benefit Cost:
Service cost	$	3,590		$	3,269		$	503		$	347
Interest cost		6,207			5,997			752			696
Expected return on plan assets		(4,848	)		(4,455	)		—			—
Amortization of prior service cost		266			269			(165	)		(165	)
Amortization of net loss		1,323			760			3			—
Net expense	$	6,538		$	5,840		$	1,093		$	878