Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

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Fixed interest rate related to the interest rate derivative.

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Amount of decrease in the fair value of derivatives recognized in the income statement.

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Amount of gain (loss) from the ineffectiveness of the hedge.

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The number of derivative instruments of a particular group held by the entity.

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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.

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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Financial instruments - Additional Information (Detail)	3 Months Ended								12 Months Ended
Financial instruments - Additional Information (Detail)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jul. 01, 2018 USD ($)	Apr. 01, 2018 USD ($)	Dec. 31, 2017 USD ($)	Oct. 01, 2017 USD ($)	Jul. 02, 2017 USD ($)	Apr. 02, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Oct. 04, 2018 USD ($)	Oct. 04, 2018 EUR (€)
Derivatives Fair Value [Line Items]
Foreign currency translation, continuing operations, adjustments, net of tax									$ (83,889,000)	$ 173,074,000	$ (69,162,000)
Ineffectiveness on hedging derivatives									0	0	0
Allowance for doubtful accounts	$ 9,348,000				$ 10,255,000				9,348,000	10,255,000
Current portion of allowance for doubtful accounts	4,400,000				3,500,000				4,400,000	3,500,000
Net revenues	641,615,000	$ 609,672,000	$ 609,866,000	$ 587,230,000	595,106,000	$ 534,703,000	$ 528,613,000	$ 487,881,000	2,448,383,000	2,146,303,000	1,868,027,000
Spain, Italy, Portugal, and Greece
Derivatives Fair Value [Line Items]
Net revenues									142,700,000	129,400,000	$ 125,300,000
Cross Currency Interest Rate Contract \| Cash Flow Hedging
Derivatives Fair Value [Line Items]
Foreign currency translation, continuing operations, adjustments, net of tax									4,000,000
Designated as Hedging Instrument \| Foreign Currency Exchange Contracts \| Cash Flow Hedging
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts	115,300,000				88,500,000				115,300,000	88,500,000
Designated as Hedging Instrument \| Cross Currency Interest Rate Contract
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts												$ 500,000,000	€ 433,900,000.0
Derivative, number of instruments held												6	6
Derivative, fixed interest rate												4.625%	4.625%
Derivative, annual interest rate												1.942%	1.942%
Not Designated as Hedging Instrument \| Foreign Currency Exchange Contracts
Derivatives Fair Value [Line Items]
Loss on derivative									1,900,000	2,600,000
Total notional amount for all open foreign currency forward contracts	$ 125,900,000				$ 110,600,000				$ 125,900,000	$ 110,600,000