Reconciliation of Statutory Canadian Income Tax rate to Effective Rate (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 31, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Effective Tax Rate Reconciliation [Line Items]
Statutory Canadian tax rate									26.00%	25.00%	27.00%
Expected income tax provision at statutory Canadian tax rate									$ 3,778	$ 2,884	$ 6,539
International tax rate differences									14	1,419	641
Permanent differences									121	241	5
Change in valuation allowance									(3,052)	(15,086)	(5,598)
Prior year provision to return differences									(296)	37	69
Net operating loss expirations									4,538
Statutory tax rate change									379	316	357
Uncertain tax positions									259	(4,093)	423
Tax credits									(938)		(144)
State income taxes, net									118	375	577
IRS audit									680	1,846	(268)
Withholding and other taxes									321	488
Other									(242)	633	(57)
Income Tax Provision (benefit)	$ 1,463	$ 1,610	$ 2,457	$ 150	$ (12,350)	$ 563	$ 617	$ 230	$ 5,680	$ (10,940)	$ 2,544
Effective tax rate									39.10%	(94.90%)	10.50%