Employee Benefit Plans (Tables)

6 Months Ended

Jan. 31, 2012

Employee Benefit Plans [Abstract]

Components Of Net Periodic Pension Costs

	Three Months Ended January 31,						Six Months Ended January 31,
	2012			2011			2012			2011
Net periodic cost:
Service cost	$	3,862		$	4,102		$	7,760		$	8,074
Interest cost		4,848			4,851			9,741			9,661
Expected return on assets		(7,005	)		(6,856	)		(14,058	)		(13,696	)
Transition amount amortization		54			55			111			109
Prior service cost amortization		127			112			255			228
Actuarial loss amortization		1,438			842			2,881			1,652
Net periodic benefit cost	$	3,324		$	3,106		$	6,690		$	6,028