Financial instruments - additional information (Detail) - USD ($)	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015	Dec. 31, 2015
Derivatives Fair Value [Line Items]
Allowance for doubtful accounts receivable	$ 8,400,000		$ 8,000,000
Current portion of allowance for doubtful accounts	1,000,000		2,000,000
Noncurrent portion of allowance for doubtful accounts	6,300,000		6,000,000
Net revenues	424,893,000	$ 429,430,000
Spain, Italy, Portugal, and Greece
Derivatives Fair Value [Line Items]
Allowance for doubtful accounts receivable	7,300,000		7,200,000
Net revenues	30,900,000	33,000,000
Net proceeds from share based compensation plans and the related tax impacts
Derivatives Fair Value [Line Items]
Ineffectiveness related to derivatives	0	$ 0
Designated as Hedging Instrument | Net proceeds from share based compensation plans and the related tax impacts | Foreign Currency Contract
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts	$ 144,600,000		49,500,000
Derivative duration	9 months
Forward Contracts | Not Designated as Hedging Instrument | Foreign Currency Contract
Derivatives Fair Value [Line Items]
Loss related to currency forward contracts	$ 300,000
Total notional amount for all open foreign currency forward contracts	$ 78,300,000		$ 69,100,000