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ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 26, 2020 | Dec. 28, 2019 | Dec. 29, 2018
Reconciliation of beginning and ending amount of unrecognized tax benefits [Roll Forward] |  |  |
Gross unrecognized tax benefits beginning of year | $ 4,166 | $ 4,378 | $ 4,000
Decrease in tax positions for prior years | (82) | (129) | (366)
Increase in tax positions for current year | 730 | 768 | 1,326
Lapse in statute of limitations | (922) | (851) | (582)
Gross unrecognized tax benefits end of year | 3,892 | 4,166 | 4,378
Income tax penalties and interest accrued | 500 | $ 500 | $ 500
Increase in unrecognized tax benefits is reasonably possible | $ 1,300 |  |

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=120406818&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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