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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Leases (Details) | 12 Months Ended
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Dec. 26, 2018 renewal_option lease | Dec. 27, 2017 lease
Operating Leased Assets [Line Items] |  |
Number of renewal options | renewal_option | 2 |
Period of renewal term | 5 years |
Number of sale leaseback transactions, accounting owner | 24 | 23
Number of sale leaseback transactions | 1 | 11
Minimum |  |
Operating Leased Assets [Line Items] |  |
Terms of lease contract | 10 years |
Maximum |  |
Operating Leased Assets [Line Items] |  |
Terms of lease contract | 15 years |

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- Definition Lessee Leasing Arrangements, Number of Renewal Options + References No definition available. + Details
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- Definition Number of sale leaseback transactions + References No definition available. + Details
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- Definition Number of Sale Leaseback Transactions, Accounting Owner + References No definition available. + Details
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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Definition Term of lessor's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888428&loc=SL77919359-209981 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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