Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Dec. 29, 2018
Disclosure Accrued Expenses [Abstract]
Accrued payroll and related expenses	$ 75,602	$ 74,952
Contract liabilities	71,394	57,913
Accrued warranty	67,612	59,451
Accrued customer rebates	42,698	45,740
Accrued short-term leases	23,070	0
Accrued sales and other tax	17,853	19,452
Accrued Product Liability And Workers Compensation Liability Current	14,651	16,284
Accrued professional services	14,461	17,313
Accrued agent commission	14,268	11,969
Other accrued expenses	59,133	64,372
Accrued expenses	$ 400,742	$ 367,446