Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Allowance for Expected Credit Losses
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 3,793	$ 3,540	$ 3,493
Charged to costs and expenses	3,777	881	1,848
Charged to other accounts	0	0	0
Deductions (describe)	927	628	1,801
Balance at end of year	6,643	3,793	3,540
Restructuring Reserve
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	11,445	11,907	2,568
Charged to costs and expenses	(4,626)	7,944	11,961
Charged to other accounts	0	49	8,569
Deductions (describe)	5,755	8,357	2,622
Balance at end of year	1,064	11,445	11,907
Warranty and Sales Allowances Reserves
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	3,853	3,495	4,111
Charged to costs and expenses	1,062	1,519	1,074
Charged to other accounts	0	0	0
Deductions (describe)	1,667	1,161	1,690
Balance at end of year	$ 3,248	$ 3,853	$ 3,495