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Taxes - Additional Information (Detail) (USD $) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 29, 2013 | Sep. 30, 2012 | Sep. 29, 2013 | Sep. 30, 2012 | Dec. 31, 2012 | Mar. 31, 2013 Research and Development Tax Credit [Member]
Tax Credit Carryforward [Line Items] |  |  |  |  |  |
Increase (decrease) in tax expense upon the expiration of the statutes of limitation for certain reserves for income tax uncertainties | $ (1,790,000) | $ (441,000) |  |  |  |
Increase (decrease) in tax expense for the final true-up of the prior year's tax accrual upon filing the actual tax returns | 267,000 | 84,000 |  |  |  |
Reduction in tax expense |  |  |  |  |  | 555,000
Effective discrete tax rate | 19.00% | 21.00% | 19.00% | 21.00% |  |
Provision for effective tax rate | 13.00% | 19.00% | 16.00% | 20.00% |  |
Increase (decrease) in liabilities, net of deferred tax benefit, for uncertain tax positions |  |  | (679,000) |  |  |
Income tax expense benefit on uncertain tax position | 1,597,000 |  |  |  |  |
Increase (decrease) in interest and penalties | 911,000 |  | 834,000 |  |  |
Reserve for income taxes, total | 4,390,000 |  | 4,390,000 |  | 5,216,000 |
Interest and penalties, gross | 297,000 |  | 297,000 |  |  |
Reserve for income taxes to be recorded in additional paid in capital |  |  | 361,000 |  |  |
Minimum decrease in income tax expense due to release in reserves |  |  | 450,000 |  |  |
Maximum decrease in income tax expense due to release in reserves |  |  | $ 550,000 |  |  |
Tax years open to examination by various taxing authorities |  |  | 2010 through 2012 |  |  |
Tax years open to examination by various taxing authorities for other entities |  |  | 2009 through 2012 |  |  |
Tax years currently under audit by internal revenue service for U.S. federal returns |  |  | 2010 and 2011 |  |  |

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