Employee Benefit Plans (Tables)

6 Months Ended

Jan. 31, 2013

Employee Benefit Plans [Abstract]

Components Of Net Periodic Pension Costs

	Three Months Ended January 31,						Six Months Ended January 31,
	2013			2012			2013			2012
Net periodic cost:
Service cost	$	4,880		$	3,862		$	9,741		$	7,760
Interest cost		4,263			4,848			8,511			9,741
Expected return on assets		(7,055	)		(7,005	)		(14,092	)		(14,058	)
Prior service cost and transition amortization		161			181			320			366
Actuarial loss amortization		2,577			1,438			5,149			2,881
Net periodic benefit cost	$	4,826		$	3,324		$	9,629		$	6,690