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FAIR VALUE MEASUREMENTS OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands | Jun. 24, 2016 | Jun. 09, 2016 | Jan. 23, 2015 | Apr. 28, 2018 | Jul. 29, 2017
--- | --- | --- | --- | --- | ---
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Interest Rate Derivative Liabilities, at Fair Value |  |  |  | $ 0 | $ (308)
Interest Rate Derivative Assets, at Fair Value |  |  |  | 7,388 | 2,491
Long term debt, including current portion, carrying value |  |  |  | 153,163 | 161,991
Long term debt, including current portion, fair value |  |  |  | $ 158,886 | $ 169,058
Interest Rate Swap January 23, 2015 [Member] |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Derivative, Maturity Date |  |  | Aug. 03, 2022 |  |
Derivative, Forward Interest Rate |  |  | 1.795% |  |
Derivative, Notional Amount |  |  | $ 115,000 |  |
Interest Rate Swap June 9, 2016 [Member] |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Derivative, Maturity Date |  | Jun. 09, 2019 |  |  |
Derivative, Forward Interest Rate |  | 0.8725% |  |  |
Derivative, Notional Amount |  | $ 50,000 |  |  |
Interest Rate Swap June 9, 2016 [Member] |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Derivative, Maturity Date |  | Apr. 29, 2021 |  |  |
Derivative, Forward Interest Rate |  | 1.065% |  |  |
Derivative, Notional Amount |  | $ 25,000 |  |  |
Interest Rate Swap June 24, 2016 [Member] |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Derivative, Maturity Date | Jun. 24, 2019 |  |  |  |
Derivative, Forward Interest Rate | 0.7265% |  |  |  |
Derivative, Notional Amount | $ 50,000 |  |  |  |
Interest Rate Swap June 24, 2016 [Member] |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Derivative, Maturity Date | Apr. 29, 2021 |  |  |  |
Derivative, Forward Interest Rate | 0.926% |  |  |  |
Derivative, Notional Amount | $ 25,000 |  |  |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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