Other Current Liabilities - Components of Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 26, 2020	Dec. 27, 2019
Other Current Liabilities Details [Abstract]
Accrued self-insurance retentions	$ 7,622	$ 7,570
Accrued warranty and service liabilities	12,578	12,785
Accrued trade promotions	6,144	8,390
Payable for employee stock purchases	6,257	13,722
Customer advances and deferred revenue	50,281	33,138
Income taxes payable	16,839	8,706
Right of return refund liability	13,730	13,791
Operating lease liability, current	8,822	7,690
Loss reserve	24,608	0
Other	29,956	37,145
Total	$ 176,837	$ 142,937