Benefit Plans Schedule of Net Benefit Costs (Tables)

9 Months Ended

May 31, 2013

Schedule of Net Periodic Benefit Costs [Abstract]

Schedule of Net Benefit Costs of Assumptions Used [Table Text Block]

	Qualified Pension Benefits						Non-Qualified Pension Benefits				Other Benefits
	2013			2012			2013		2012		2013			2012
Components of net periodic benefit costs for the three months ended May 31:
Service cost	$	9,109		$	6,505		$	211	$	68	$	935		$	896
Interest cost	6,072			5,942			340		346		443			672
Expected return on assets	(13,388		)	(10,004		)
Prior service cost (credit) amortization	399			458			57		57		(81		)	(26		)
Actuarial loss amortization	6,500			3,809			270		109		371			243
Transition amount amortization											73			234
Net periodic benefit cost	$	8,692		$	6,710		$	878	$	580	$	1,741		$	2,019
Components of net periodic benefit costs for the nine months ended May 31:
Service cost	$	23,541		$	19,508		$	540	$	209	$	2,202		$	1,917
Interest cost	19,078			17,786			987		1,041		1,675			1,945
Expected return on assets	(37,311		)	(30,013		)
Prior service cost (credit) amortization	1,198			1,374			171		171		(90		)	(78		)
Actuarial loss amortization	16,961			11,285			692		334		817			656
Transition amount amortization											422			702
Net periodic benefit cost	$	23,467		$	19,940		$	2,390	$	1,755	$	5,026		$	5,142