CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenue		$ 837,547	$ 1,006,090	$ 1,037,098
Cost of revenue		236,306	284,185	277,271
Gross margin		601,241	721,905	759,827
Research, development, and engineering expenses		139,400	141,133	135,372
Selling, general, and administrative expenses		339,139	312,107	309,354
Loss (recovery) from fire		(8,000)	20,779	0
Restructuring charges		0	1,657	0
Operating income		130,702	246,229	315,101
Foreign currency gain (loss)		(10,039)	(1,837)	(2,270)
Investment income		14,093	6,715	6,660
Other income (expense)		592	(412)	(591)
Income before income tax expense		135,348	250,695	318,900
Income tax expense on continuing operations		22,114	35,170	39,019
Net income		$ 113,234	$ 215,525	$ 279,881
Net Income per weighted-average common and common-equivalent share:
Net income (in dollars per share)		$ 0.66	$ 1.24	$ 1.59
Diluted earnings per weighted-average common and common-equivalent share (1):
Net income (in dollars per share)		$ 0.65	$ 1.23	$ 1.56
Weighted-average common and common-equivalent shares outstanding:
Basic (in shares)		172,249	173,407	176,463
Diluted (in shares)		173,399	174,869	179,916
Cash dividends per common share (in dollars per share)	[1]	$ 0.286	$ 0.265	$ 0.245

[1] 175,790