Revenues Revenues - Significant changes in contract liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2022	Apr. 03, 2021
Revenues [Abstract]
Balance at beginning of period	$ 23,050	$ 13,852
Revenue recognized that was included in the contract liability balance at the beginning of the period	(11,426)	(9,713)
Increases due to cash received, excluding amounts recognized as revenue during the period	15,987	14,938
Balance at end of period	$ 27,611	$ 19,077