Components of Income Tax Provision (Benefit) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Components Of Income Tax Expense Benefit [Line Items]
Current income tax provision (benefit)									$ 5,902	$ 2,052	$ 6,412
Deferred income tax provision (benefit)									(16,842)	492	5,540
Income Tax Provision (benefit)	(12,350)	563	617	230	(1,326)	851	1,363	1,656	(10,940)	2,544	11,952
CANADA
Components Of Income Tax Expense Benefit [Line Items]
Current income tax provision (benefit)											629
Deferred income tax provision (benefit)											(40)
UNITED STATES
Components Of Income Tax Expense Benefit [Line Items]
Current income tax provision (benefit)									3,625	388	1,589
Deferred income tax provision (benefit)									(13,882)	(150)	4,929
Other Countries
Components Of Income Tax Expense Benefit [Line Items]
Current income tax provision (benefit)									2,277	1,664	4,194
Deferred income tax provision (benefit)									$ (2,960)	$ 642	$ 651