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Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Jan. 01, 2018 | Apr. 01, 2018 | Apr. 02, 2017
Summary Of Significant Accounting Policies [Line Items] |  |  |
Revenue recognized in accordance with ASC 606 |  | $ 487,467 | $ 456,913
Revenue on leases |  | $ 4,300 |
Standard warranty period |  | 12 months |
Deferred revenue and customer advances balance | $ 21,800 |  |
ASU 2014-09 |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Revenue recognized in accordance with ASC 606 |  | $ 483,200 |
ASU 2017-07 |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Increase in income from operations |  |  | $ 400
Retained Earnings | ASU 2014-09 |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Increase (decrease) in adoption of new accounting guidance amount | 12,700 |  |
Retained Earnings | ASU 2016-01 |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Increase (decrease) in adoption of new accounting guidance amount | 3,100 |  |
Accumulated Other Comprehensive Income (Loss) | ASU 2016-01 |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Increase (decrease) in adoption of new accounting guidance amount | $ (3,100) |  |

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