Employee Benefit Plans (Tables)

9 Months Ended

Apr. 30, 2013

Employee Benefit Plans [Abstract]

Components Of Net Periodic Pension Costs

	Three Months Ended April 30,						Nine Months Ended April 30,
	2013			2012			2013			2012
Net periodic cost:
Service cost	$	4,866		$	3,870		$	14,607		$	11,630
Interest cost		4,222			4,866			12,733			14,607
Expected return on assets		(7,008	)		(7,057	)		(21,100	)		(21,115	)
Prior service cost amortization		162			181			482			547
Actuarial loss amortization		2,563			1,393			7,712			4,274
Net periodic benefit cost	$	4,805		$	3,253		$	14,434		$	9,943