Contingent Liabilites and Commitments Litigation Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
May 27, 2017	May 28, 2016	May 27, 2017	May 28, 2016
Commitments and Contingencies Disclosure [Abstract]
Legal settlement	$ 0	$ 2,750	$ 0	$ 2,750

Cash received for the settlement of litigation during the current period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585

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