Employee Benefit Plans (Tables)

9 Months Ended

Apr. 30, 2014

Employee Benefit Plans [Abstract]

Components Of Net Periodic Pension Costs

	Three Months Ended		Nine Months Ended
	April 30,		April 30,
	2014	2013	2014	2013
	(thousands of dollars)
Net periodic cost:
Service cost	$           4,719	$          4,866	$     14,104	$     14,607
Interest cost	4,885	4,222	14,602	12,733
Expected return on assets	(7,691)	(7,008)	(22,970)	(21,100)
Prior service cost and transition amortization	147	162	443	482
Actuarial loss amortization	1,853	2,563	5,551	7,712
Net periodic benefit cost	$           3,913	$          4,805	$     11,730	$     14,434