CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Income Statement [Abstract]
Revenue	$ 229,464	$ 215,356	$ 448,590	$ 419,572
Cost of revenue	125,341	120,111	246,839	234,051
Gross profit	104,123	95,245	201,751	185,521
Operating expenses:
Research and development and engineering	23,380	21,588	46,208	42,517
Selling, general and administrative	42,187	40,538	83,110	79,890
Amortization of purchased intangible assets	5,124	7,173	10,213	14,515
Restructuring, acquisition, and related costs	1,234	2,655	3,710	1,025
Total operating expenses	71,925	71,954	143,241	137,947
Operating income	32,198	23,291	58,510	47,574
Interest income (expense), net	(6,810)	(2,757)	(13,142)	(5,866)
Foreign exchange transaction gains (losses), net	74	152	(3)	221
Other income (expense), net	(191)	68	(357)	(477)
Income before income taxes	25,271	20,754	45,008	41,452
Income tax provision (benefit)	4,392	3,275	5,864	5,153
Consolidated net income	$ 20,879	$ 17,479	$ 39,144	$ 36,299
Earnings per common share:
Basic	$ 0.58	$ 0.49	$ 1.09	$ 1.02
Diluted	$ 0.58	$ 0.49	$ 1.09	$ 1.01
Weighted average common shares outstanding—basic	35,851	35,609	35,830	35,573
Weighted average common shares outstanding—diluted	36,032	35,933	36,015	35,857