Changes in Carrying Values of Goodwill (Detail) $ in Thousands	6 Months Ended
Jul. 02, 2016 USD ($)
Goodwill [Line Items]
Beginning balance	$ 159,331
Goodwill acquired during the period	2,945
Effect of exchange rate changes	6,206
Ending balance	168,482
Other
Goodwill [Line Items]
Beginning balance	17,293
Effect of exchange rate changes	3,427
Ending balance	20,720
North America
Goodwill [Line Items]
Beginning balance	133,408
Goodwill acquired during the period	2,945
Effect of exchange rate changes	2,820
Ending balance	139,173
United Kingdom Segment
Goodwill [Line Items]
Beginning balance	1,370
Effect of exchange rate changes	(139)
Ending balance	1,231
Continental Europe
Goodwill [Line Items]
Beginning balance	7,260
Effect of exchange rate changes	98
Ending balance	$ 7,358

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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