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Debt (Narrative) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 25, 2020 | Dec. 27, 2019
Line of Credit Facility [Line Items] |  |  |
Estimated fair value of debt | $ 165,000,000 | $ 170,000,000 |
Maximum borrowing amount - credit facility | 595,000,000 |  |
Interest paid | 9,800,000 | 11,300,000 | $ 13,500,000
Total debt, including current portion | 193,489,000 | 172,183,000 |
Revolving Credit Facility |  |  |
Line of Credit Facility [Line Items] |  |  |
Chinese Renminbi Facility Maximum Borrowing Capacity | 50,000,000 |  |
Committed Facility |  |  |
Line of Credit Facility [Line Items] |  |  |
Unused portion of credit facility | 525,000,000 |  |
Committed Facility | Domestic Line of Credit [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Maximum borrowing amount - credit facility | 550,000,000 |  |
Committed Facility | Foreign Line of Credit |  |  |
Line of Credit Facility [Line Items] |  |  |
Maximum borrowing amount - credit facility | 45,000,000 |  |
Uncommitted Facility | Foreign Line of Credit |  |  |
Line of Credit Facility [Line Items] |  |  |
Unused portion of credit facility | $ 28,000,000 |  |
Uncommitted Facility | Foreign Line of Credit | Maximum |  |  |
Line of Credit Facility [Line Items] |  |  |
Loan commitment fee percentage | 0.15% |  |
Shelf Notes [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Maximum borrowing amount - credit facility | $ 200,000,000 |  |
Debt Instrument, Maturity Date | Jan. 29, 2023 |  |
Floating Rate Principal Maximum | $ 100,000,000 |  |
Series B maturing March 2023 |  |  |
Line of Credit Facility [Line Items] |  |  |
Total debt, including current portion |  | $ 75,000,000 |
Debt Instrument, Fee Amount | 3,500,000 |  |
Debt Instrument, Repurchased Face Amount | 75,000,000 |  |
Line of Credit | Committed Facility | Revolving Credit Facility |  |  |
Line of Credit Facility [Line Items] |  |  |
Maximum borrowing amount - credit facility | 500,000,000 |  |
Line of Credit Facility, Current Borrowing Capacity | $ 250,000,000 |  |
Line of Credit | Committed Facility | Revolving Credit Facility | Minimum |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt instrument, basis spread on variable rate | 0.00% |  |
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases | $ 200,000,000 |  |
Line of Credit | Committed Facility | Revolving Credit Facility | Maximum |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt instrument, basis spread on variable rate | 0.75% |  |
Line of Credit | Federal Funds Effective Swap Rate | Committed Facility |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt instrument, basis spread on variable rate | 0.50% |  |
Line of Credit | London Interbank Offered Rate (LIBOR) | Committed Facility |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt instrument, basis spread on variable rate | 1.50% |  |
Line of Credit | London Interbank Offered Rate (LIBOR) | Committed Facility | Revolving Credit Facility | Minimum |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt instrument, basis spread on variable rate | 1.00% |  |
Line of Credit | London Interbank Offered Rate (LIBOR) | Committed Facility | Revolving Credit Facility | Maximum |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt instrument, basis spread on variable rate | 1.75% |  |

X
- Definition Chinese Renminbi Facility Maximum Borrowing Capacity + References No definition available. + Details
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- Definition Floating Rate Principal Maximum + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 + Details
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- Definition Amount of the fee that accompanies borrowing money under the debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4297-108586 + Details
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- Definition The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for a specific purpose other than for financing goods acquired for inventory or imminent delivery to a customer. + References No definition available. + Details
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X
- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + 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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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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