Restructuring charges (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 9,968	$ 4,448
Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	9,852	3,699
Facility Closure Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	123	89
Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(108)	639
Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	101	21
2016 Manufacturing Footprint Realignment Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	10,347
2016 Manufacturing Footprint Realignment Plan | Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	10,347
2016 Manufacturing Footprint Realignment Plan | Facility Closure Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
2016 Manufacturing Footprint Realignment Plan | Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
2016 Manufacturing Footprint Realignment Plan | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
2015 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring charges	237	4,238
2015 Restructuring Program | Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	43	3,550
2015 Restructuring Program | Facility Closure Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	123	67
2015 Restructuring Program | Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(22)	621
2015 Restructuring Program | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	93	0
2014 Manufacturing Footprint Realignment Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(536)	163
2014 Manufacturing Footprint Realignment Plan | Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(538)	137
2014 Manufacturing Footprint Realignment Plan | Facility Closure Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	22
2014 Manufacturing Footprint Realignment Plan | Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	0
2014 Manufacturing Footprint Realignment Plan | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2	4
Other restructuring programs - prior years
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(80)	47
Other restructuring programs - prior years | Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	12
Other restructuring programs - prior years | Facility Closure Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	0
Other restructuring programs - prior years | Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(86)	18
Other restructuring programs - prior years | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 6	$ 17