CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Apr. 01, 2022
Income Statement [Abstract]
Revenue	$ 219,126	$ 204,216
Cost of revenue	121,498	113,940
Gross profit	97,628	90,276
Operating expenses:
Research and development and engineering	22,828	20,929
Selling, general and administrative	40,923	39,352
Amortization of purchased intangible assets	5,089	7,342
Restructuring, acquisition, and related costs	2,476	(1,630)
Total operating expenses	71,316	65,993
Operating income	26,312	24,283
Interest income (expense), net	(6,332)	(3,109)
Foreign exchange transaction gains (losses), net	(77)	69
Other income (expense), net	(166)	(545)
Income before income taxes	19,737	20,698
Income tax provision (benefit)	1,472	1,878
Consolidated net income	$ 18,265	$ 18,820
Earnings per common share (Note 4):
Basic	$ 0.51	$ 0.53
Diluted	$ 0.51	$ 0.53
Weighted average common shares outstanding—basic	35,810	35,538
Weighted average common shares outstanding—diluted	35,999	35,781