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Recent Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 29, 2018	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative adjustment to retained earnings	$ 225,485		$ 186,226
Disclose of operating lease obligations			$ 71,800
ASU 2016-01 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification of accumulated changes in fair market value from accumulated other comprehensive income to retained earnings		$ 3,800
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] \| ASU 2014-09 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative adjustment to retained earnings		$ 200