Postretirement and Other Employee Benefits (Net Periodic Benefit Cost) (Details 7) $ in Thousands	12 Months Ended
Aug. 31, 2016 USD ($)
Postretirement and Other Employee Benefits [Abstract]
Recognized net actuarial loss	$ 1,919
Amortization of prior service credit	(139)
Total	$ 1,780

Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation).

No definition available.

Name:	us-gaap_DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration