Benefit Plans Schedule of Net Benefit Costs (Tables)

3 Months Ended

Nov. 30, 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 November 30 are as follows:	(Dollars in thousands)
Service cost	$	9,383		$	9,058		$	259	$	225	$	353		$	472
Interest cost	7,693			7,014			352		352		427			415
Expected return on assets	(12,014		)	(12,438		)	—		—		—			—
Prior service cost (credit) amortization	402			407			57		57		(30		)	(30		)
Actuarial (gain) loss amortization	4,754			4,901			173		261		(116		)	(105		)
Net periodic benefit cost	$	10,218		$	8,942		$	841	$	895	$	634		$	752