Other Current Liabilities - Components of Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 25, 2020	Dec. 27, 2019
Other Current Liabilities Details [Abstract]
Accrued self-insurance retentions	$ 7,578	$ 7,570
Accrued warranty and service liabilities	12,571	12,785
Accrued trade promotions	9,261	8,390
Payable for employee stock purchases	10,361	13,722
Customer advances and deferred revenue	52,206	33,138
Income taxes payable	6,331	8,706
Right of return refund liability	15,112	13,791
Operating lease liability, current	9,165	7,690
Other	32,695	37,145
Total	$ 155,280	$ 142,937