Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 29, 2019	Jan. 01, 2019	Feb. 28, 2016
Summary Of Significant Accounting Policies [Line Items]
Operating Lease, Liability	$ 65,199	$ 54,300	$ 54,300
Operating Lease, Right-of-Use Asset	$ 57,595	$ 50,100	$ 50,100