Other Current Liabilities - Components of Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 27, 2020	Dec. 27, 2019
Other Current Liabilities Details [Abstract]
Accrued self-insurance retentions	$ 7,600	$ 7,570
Accrued warranty and service liabilities	12,759	12,785
Accrued trade promotions	6,654	8,390
Payable for employee stock purchases	2,976	13,722
Customer advances and deferred revenue	42,515	33,138
Income taxes payable	12,803	8,706
Right of return refund liability	13,788	13,791
Operating lease liability, current	9,116	7,690
Other	32,866	37,145
Total	$ 141,077	$ 142,937