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LEASES (Tables) | 12 Months Ended
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Dec. 26, 2020
Schedule of lease costs | Lease costs under non-cancelable operating leases on December 26, 2020 and December 28, 2019 are as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | 2020 | ​ | ​ | 2019
Operating lease cost | ​ | $ | 21,594 | ​ | $ | 20,771
Short-term lease cost | ​ |  | 2,863 | ​ |  | 110
Variable lease cost | ​ |  | 3,985 | ​ |  | 1,484
Sublease income | ​ |  | (1,013) | ​ |  | (676)
Total lease cost | ​ | $ | 27,429 | ​ | $ | 21,689
Future Minimum Lease Payments | Future minimum payments under non-cancelable operating leases on December 26, 2020 are as follows (in thousands):
​ | ​ | ​ | ​
​ |  | Operating
​ | ​ | Leases
2021 | ​ | $ | 18,671
2022 | ​ |  | 15,219
2023 | ​ |  | 12,126
2024 | ​ |  | 9,594
2025 | ​ |  | 8,102
Thereafter | ​ |  | 25,961
Total minimum lease payments | ​ | $ | 89,673
Less present value discount | ​ | ​ | (11,615)
Total lease liability | ​ | $ | 78,058

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
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