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COMMITMENTS and CONTINGENCIES (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended | 72 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 29, 2016 USD ($) | Oct. 25, 2014 USD ($) | Jul. 28, 2018 union | Jul. 28, 2018 USD ($) | Jul. 27, 2013 USD ($)
Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |
Insurance settlements receivable |  |  |  |  | $ 4,913
Insurance receivable write-off |  | $ 2,270 |  |  |
Insurance recoveries | $ 940 |  |  | $ 3,583 |
Concentration Risk [Line Items] |  |  |  |  |
Number of unions | union |  |  | 7 |  |
Expiration period of union contracts |  |  | 1 year |  |
Labor Force Concentration Risk | Workforce Subject to Collective Bargaining Arrangements |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Percentage of employees covered by collective bargaining agreements |  |  | 89.00% | 89.00% |
Unionized Employees Concentration Risk | Workforce Subject to Collective Bargaining Arrangements Expired or Expiring within One Year |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Percentage of employees covered by collective bargaining agreements |  |  | 19.00% | 19.00% |

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- Definition The increase (decrease) during the reporting period in insurance settlements receivable, which are amounts due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. The expectation is that such reimbursement will be received within one year of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Percentage of employee participants subject to a collective bargaining arrangement to all of the employer's participants in a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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