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Schedule II-Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 26, 2020 | Dec. 28, 2019 | Dec. 29, 2018
Movement in Valuation and Qualifying Accounts |  |  |
Balance at beginning of period | $ 9,548 | $ 8,277 | $ 9,813
Charged to profit and loss | 7,957 | 2,543 | 994
Currency Translation Adjustment | 260 | (76) | (365)
Deductions from reserves* | (1,813) | (1,196) | (2,165)
Balance at close of period | 15,952 | 9,548 | 8,277
Allowance for deferred income tax asset valuation |  |  |
Movement in Valuation and Qualifying Accounts |  |  |
Balance at beginning of period | 35,215 | 33,228 | 27,864
Charged to profit and loss | 11,450 | 4,141 | 10,769
Currency Translation Adjustment | 1,064 | (296) | (384)
Deductions from reserves* | (3,278) | (1,858) | (5,021)
Balance at close of period | $ 44,451 | $ 35,215 | $ 33,228

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of decrease in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column D)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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