Summary of Significant Accounting Policies Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Significant Accounting Policies [Line Items]
Non-cash share-based compensation expense	$ 3,500	$ 100	$ 5,268	$ 6,478
Interest paid			35,900	17,400
Income tax payments			$ 61,300	$ 96,700
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%	35.00%