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Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Allowance for doubtful accounts |  |  |  |
Valuation And Qualifying Accounts Disclosure [Line Items] |  |  |  |
Balance at Beginning of Period |  | $ 2,001 | $ 2,973 | $ 2,226
Additions charged to Costs and Expenses |  | 130 | (587) | 363
Additions charged to Other Accounts |  | 0 | 0 | 384
Deductions | [1] | (388) | (385) | 0
Balance at End of Period |  | 1,743 | 2,001 | 2,973
Inventory and other reserves |  |  |  |
Valuation And Qualifying Accounts Disclosure [Line Items] |  |  |  |
Balance at Beginning of Period |  | 3,984 | 3,703 | 4,065
Additions charged to Costs and Expenses |  | 7,906 | 7,823 | 5,109
Additions charged to Other Accounts |  | 0 | 0 | 0
Deductions | [1] | (8,047) | (7,542) | (5,471)
Balance at End of Period |  | 3,843 | 3,984 | 3,703
Tax valuation allowance |  |  |  |
Valuation And Qualifying Accounts Disclosure [Line Items] |  |  |  |
Balance at Beginning of Period |  | 22,760 | 18,277 | 28,280
Additions charged to Costs and Expenses |  | 1,893 | 11,515 | 2,258
Additions charged to Other Accounts |  | (403) | 1,079 | (483)
Deductions | [1] | (18,059) | (8,111) | (11,778)
Balance at End of Period |  | $ 6,191 | $ 22,760 | $ 18,277
[1] | Primarily represents the utilization of established reserves, net of recoveries, where applicable.

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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) -URI http://asc.fasb.org/extlink&oid=26873400&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) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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