Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
Disclosure Accrued Expenses [Abstract]
Contract liabilities	$ 81,504	$ 74,511
Accrued payroll and related expenses	57,607	81,541
Accrued warranty	62,494	66,374
Accrued customer rebates	22,372	51,709
Accrued short-term leases	22,830	21,827
Accrued Product Liability And Workers Compensation Liability Current	13,029	15,164
Accrued agent commission	9,657	13,816
Accrued agent commission	13,653	19,862
Accrued professional services	12,864	13,368
Other accrued expenses	59,577	58,378
Accrued expenses	$ 355,587	$ 416,550