Goodwill and Other Intangible Assets - (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 03, 2021	Jul. 03, 2021	Jun. 01, 2021	Dec. 31, 2020
Goodwill [Line Items]
Impairment charges		$ 1,126
Goodwill	$ 45,732	45,732		$ 31,105
Indefinite-lived intangible assets	54,474	54,474		32,039
Amortization of intangible assets	700	1,400
Trade names
Goodwill [Line Items]
Indefinite-lived intangible assets	7,748	7,748		$ 5,423
Instrumentation
Goodwill [Line Items]
Impairment charges	1,100
Goodwill	0	0
Instrumentation | Trade names
Goodwill [Line Items]
Impairment of indefinite lived intangible assets	100
Indefinite-lived intangible assets	300	300
DTS Acquisition
Goodwill [Line Items]
Goodwill			$ 15,587
Finite-lived intangible assets acquired	21,300	21,300
Indefinite-lived intangible assets acquired	2,400	2,400
Amortization of intangible assets	$ 100	$ 100