Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 28, 2019
Disclosure Accrued Expenses [Abstract]
Contract liabilities	$ 86,103	$ 74,511
Accrued payroll and related expenses	71,526	80,621
Accrued warranty	67,714	66,374
Accrued customer rebates	33,418	51,709
Accrued sales and other tax	23,438	19,862
Accrued short-term leases	23,297	21,827
Accrued interest rate swaps	15,282	0
Accrued Product Liability And Workers Compensation Liability Current	13,134	15,164
Accrued professional services	12,291	13,368
Accrued agent commission	10,562	13,816
Restructuring Charges	5,818	1,121
Other accrued expenses	58,997	58,177
Accrued expenses	$ 421,580	$ 416,550