Comprehensive Income (Loss) Reclassification from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May. 30, 2015	May. 31, 2014	May. 30, 2015	May. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of prior service credit	$ (903)	$ (925)	$ (2,525)	$ (2,601)
Amortization of net actuarial loss	249	173	668	505
Total reclassifications	$ (654)	$ (752)	$ (1,857)	$ (2,096)