Benefit Plans Schedule of Net Benefit Costs (Tables)

9 Months Ended

May. 31, 2015

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
	2015			2014			2015		2014		2015			2014
Components of net periodic benefit costs for the three months ended May 31 are as follows:	(Dollars in thousands)
Service cost	$	8,889		$	7,543		$	206	$	219	$	188		$	339
Interest cost	7,003			7,495			357		423		288			418
Expected return on assets	(12,431		)	(11,910		)	—		—		—			—
Prior service cost (credit) amortization	407			398			57		57		(30		)	(30		)
Actuarial (gain) loss amortization	4,916			4,566			272		250		(342		)	(228		)
Net periodic benefit cost	$	8,784		$	8,092		$	892	$	949	$	104		$	499
Components of net periodic benefit costs for the nine months ended May 31 are as follows:
Service cost	$	27,005		$	22,812		$	656	$	646	$	1,134		$	1,297
Interest cost	21,019			22,433			1,061		1,245		1,118			1,439
Expected return on assets	(37,305		)	(35,726		)	—		—		—			—
Prior service cost (credit) amortization	1,223			1,195			171		171		(90		)	(90		)
Actuarial (gain) loss amortization	14,724			13,655			794		718		(553		)	(415		)
Net periodic benefit cost	$	26,666		$	24,369		$	2,682	$	2,780	$	1,609		$	2,231