Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(10))
-URI http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(12))
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 21D
-URI http://asc.fasb.org/extlink&oid=109223946&loc=SL94080555-108585

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

Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 27, 2018	Jul. 31, 2018
Recent Accounting Pronouncements [Abstract]
Dividends from equity method investments	$ 200
ASU 2016-01 [Member] \| Retained Earnings [Member]
Recent Accounting Pronouncements [Abstract]
Cumulative effect of adoption		$ (5)
ASU 2016-01 [Member] \| Retained Earnings [Member] \| Maximum [Member]
Recent Accounting Pronouncements [Abstract]
Cumulative effect of adoption	(100)
ASU 2016-01 [Member] \| Accumulated Other Comprehensive Income [Member]
Recent Accounting Pronouncements [Abstract]
Cumulative effect of adoption		$ 5
ASU 2016-01 [Member] \| Accumulated Other Comprehensive Income [Member] \| Maximum [Member]
Recent Accounting Pronouncements [Abstract]
Cumulative effect of adoption	$ 100