Employee Benefit Plans (Tables)

3 Months Ended

Oct. 31, 2012

Employee Benefit Plans [Abstract]

Components Of Net Periodic Pension Costs

	Three Months Ended October 31,
	2012			2011
	(thousands of dollars)
Net periodic cost:
Service cost	$	4,861		$	3,898
Interest cost		4,248			4,893
Expected return on assets		(7,037	)		(7,053	)
Transition amount amortization		52			57
Prior service cost amortization		107			128
Actuarial loss amortization		2,572			1,443
Net periodic benefit cost	$	4,803		$	3,366