CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue		$ 1,037,098	$ 811,020	$ 725,625
Cost of revenue		277,271	206,421	189,754
Gross margin		759,827	604,599	535,871
Research, development, and engineering expenses		135,372	130,982	119,427
Selling, general, and administrative expenses		309,354	267,593	273,842
Restructuring charges		0	15,924	0
Intangible asset impairment charges		0	19,571	0
Operating income		315,101	170,529	142,602
Foreign currency gain (loss)		(2,270)	3,697	(509)
Investment income		6,660	12,994	19,689
Other income (expense)		(591)	(309)	1,212
Income before income tax expense (benefit)		318,900	186,911	162,994
Income tax expense on continuing operations		39,019	10,725	(40,871)
Net income		$ 279,881	$ 176,186	$ 203,865
Net Income per weighted-average common and common-equivalent share:
Net income (in dollars per share)		$ 1.59	$ 1.02	$ 1.19
Diluted earnings per weighted-average common and common-equivalent share (1):
Net income (in dollars per share)		$ 1.56	$ 1.00	$ 1.16
Weighted-average common and common-equivalent shares outstanding:
Basic (in shares)		176,463	173,489	171,194
Diluted (in shares)		179,916	176,592	175,269
Cash dividends per common share (in dollars per share)	[1]	$ 0.245	$ 2.225	$ 0.205

[1] 170,820