Employee Benefit Plans (Tables)

3 Months Ended

Oct. 31, 2013

Employee Benefit Plans [Abstract]

Components Of Net Periodic Pension Costs

	Three Months Ended
	October 31,
	2013	2012
	(thousands of dollars)
Net periodic cost:
Service cost	$       4,683	$       4,861
Interest cost	4,854	4,248
Expected return on assets	(7,623)	(7,037)
Prior service cost and transition amortization	148	159
Actuarial loss amortization	1,848	2,572
Net periodic benefit cost	$       3,910	$       4,803