Employee Benefit Plans (Tables)

6 Months Ended

Jan. 31, 2015

Employee Benefit Plans [Abstract]

Components Of Net Periodic Pension Costs

	Three Months Ended		Six Months Ended
	January 31,		January 31,
	2015	2014	2015	2014
	(thousands of dollars)
Net periodic cost:
Service cost	$           5,134	$           4,702	$         10,278	$           9,385
Interest cost	4,905	4,863	9,684	9,717
Expected return on assets	(7,541)	(7,656)	(14,884)	(15,279)
Prior service cost and transition amortization	142	148	291	296
Settlement cost	3,906	-	3,906	-
Actuarial loss amortization	1,854	1,850	3,686	3,698
Net periodic benefit cost	$           8,400	$           3,907	$         12,961	$           7,817