Goodwill and Intangible Assets (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 28, 2021	Dec. 28, 2021	Dec. 29, 2020	Dec. 31, 2019
Changes in the carrying amount of goodwill
Balance at the beginning of the period		$ 127,001,000	$ 124,748,000
Additions		0	3,329,000
Disposals and other, net		0	0
Impairment	$ 0	0	(1,076,000)	$ 0
Balance at the end of the period	127,001,000	127,001,000	127,001,000	124,748,000
Accumulated goodwill impairment loss				4,800,000
Changes in the carrying amount of intangible assets
Balance at the beginning of the period, net		2,271,000	1,234,000
Additions		0	1,600,000
Amortization expense		(751,000)	(563,000)
Disposals and other, net		0	0
Impairment		0	0
Balance at the end of the period, net	1,520,000	1,520,000	2,271,000	$ 1,234,000
Gross carrying amount	16,600,000	16,600,000	16,600,000
Accumulated amortization	$ 15,092,000	15,092,000	$ 14,341,000
Minimum
Changes in the carrying amount of intangible assets
Expected amortization expense for each of the next five years		100,000
Maximum
Changes in the carrying amount of intangible assets
Expected amortization expense for each of the next five years		$ 700,000