Business segments and other information - total net revenues and total net property, plant and equipment by geographic region (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 31, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Net revenues	$ 476,008	$ 457,173	$ 468,105	$ 438,546	$ 450,539	$ 413,796	$ 420,059	$ 411,877	$ 1,839,832	$ 1,696,271	$ 1,551,009
Property, plant and equipment, net	317,435				325,900				317,435	325,900	297,945
United States
Segment Reporting Information [Line Items]
Net revenues									916,619	844,884	789,771
Property, plant and equipment, net	174,893				203,985				174,893	203,985	180,833
Other Americas
Segment Reporting Information [Line Items]
Net revenues									60,736	57,098	53,665
Europe
Segment Reporting Information [Line Items]
Net revenues									664,982	568,559	516,982
Malaysia
Segment Reporting Information [Line Items]
Property, plant and equipment, net	36,427				29,313				36,427	29,313	27,764
Czech Republic
Segment Reporting Information [Line Items]
Property, plant and equipment, net	35,655				41,607				35,655	41,607	45,884
All Other
Segment Reporting Information [Line Items]
Net revenues									197,495	225,730	190,591
Property, plant and equipment, net	$ 70,460				$ 50,995				$ 70,460	$ 50,995	$ 43,464