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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, 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
Schedule Of Effective Tax Rates Line Items                      
Statutory Canadian tax rate                 25.00% 27.00% 28.00%
Expected income tax provision (benefit)                 $ 2,884 $ 6,539 $ (2,232)
Permanent differences                 241 5 9,581
International tax rate differences                 1,419 641 (1,962)
Change in valuation allowance                 (15,086) (5,598) 3,862
Prior year provision to return differences                 37 69 136
NOL expirations                     877
Statutory tax rate change                 316 357 371
Uncertain tax positions                 (4,093) 423 972
Tax credits                   (144) (68)
State income tax, net                 375 577 519
IRS audit                 1,846 (268) (318)
Withholding and other taxes                 488    
Other                 633 (57) 214
Income Tax Provision (benefit) $ (12,350) $ 563 $ 617 $ 230 $ (1,326) $ 851 $ 1,363 $ 1,656 $ (10,940) $ 2,544 $ 11,952
Effective tax rate                 (94.90%) 10.50% 149.90%