Comprehensive Income (Loss) Changes in AOCI by component (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 28, 2015	Nov. 29, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	$ (2,274)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Balance at end of period	14,598
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(2,274)	$ (1,808)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
OCI before reclassifications	17,701	0
Amounts reclassified from AOCI	(829)	(601)
Net current-period OCI	16,872	(601)
Balance at end of period	$ 14,598	$ (2,409)