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Financial instruments - Additional Information (Detail) - USD ($) | 3 Months Ended |
--- | --- | ---
Apr. 02, 2017 | Mar. 27, 2016 | Dec. 31, 2016
Derivatives Fair Value [Line Items] |  |  |
Net revenues | $ 487,881,000 | $ 424,893,000 |
Spain, Italy, Portugal, and Greece |  |  |
Derivatives Fair Value [Line Items] |  |  |
Net revenues | 31,500,000 | 30,900,000 |
Cash flow hedging |  |  |
Derivatives Fair Value [Line Items] |  |  |
Ineffectiveness related to derivatives | 0 |  |
Foreign exchange contract | Designated as Hedging Instrument | Cash flow hedging |  |  |
Derivatives Fair Value [Line Items] |  |  |
Total notional amount for all open foreign currency forward contracts | 124,400,000 |  | $ 101,800,000
Foreign exchange contract | Not Designated as Hedging Instrument |  |  |
Derivatives Fair Value [Line Items] |  |  |
Loss related to currency forward contracts | 800,000 | $ 300,000 |
Total notional amount for all open foreign currency forward contracts | $ 79,300,000 |  | $ 73,400,000

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Amount of decrease in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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- Definition The net gain (loss) recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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