Comprehensive Income (Loss) Reclassification from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 28, 2016	May 30, 2015	May 28, 2016	May 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of prior service credit	$ (1,243)	$ (903)	$ (3,545)	$ (2,525)
Amortization of net actuarial loss	260	249	751	668
Total reclassifications	$ (983)	$ (654)	$ (2,794)	$ (1,857)