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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
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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%

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