Benefit Plans Schedule of Net Benefit Costs (Tables)

6 Months Ended

Feb. 28, 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 February 28 are as follows:	(Dollars in thousands)
Service cost	$	9,058		$	7,802		$	225	$	248	$	474		$	476
Interest cost	7,002			8,240			352		486		415			502
Expected return on assets	(12,436		)	(11,082		)	—		—		—			—
Prior service cost (credit) amortization	409			398			57		57		(30		)	(30		)
Actuarial (gain) loss amortization	4,907			4,445			261		241		(106		)	(311		)
Net periodic benefit cost	$	8,940		$	9,803		$	895	$	1,032	$	753		$	637
Components of net periodic benefit costs for the six months ended February 28 are as follows:
Service cost	$	18,116		$	15,269		$	450	$	427	$	946		$	958
Interest cost	14,016			14,938			704		822		830			1,021
Expected return on assets	(24,874		)	(23,816		)	—		—		—			—
Prior service cost (credit) amortization	816			797			114		114		(60		)	(60		)
Actuarial (gain) loss amortization	9,808			9,089			522		468		(211		)	(187		)
Net periodic benefit cost	$	17,882		$	16,277		$	1,790	$	1,831	$	1,505		$	1,732