CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenue	$ 1,089,752	$ 1,046,487	$ 990,533
Cost of revenue (exclusive of depreciation, shown separately below)	565,168	543,211	535,597
Other operating expenses:
Research and development	137,913	134,691	122,847
Selling, general and administrative	238,018	214,694	198,279
Depreciation	23,598	24,835	22,926
Restructuring and reorganization charges	46,308	4,870	5,328
Total operating expenses	1,011,005	922,301	884,977
Operating income	78,747	124,186	105,556
Other income (expense):
Interest expense	(16,432)	(14,569)	(15,500)
Amortization of original issue discount	0	(3,021)	(2,983)
Interest and investment income, net	877	365	1,244
Loss on derivative liability upon debt conversion	(7,456)	0	0
Other, net	5,045	(6,015)	(2,961)
Total other	(17,966)	(23,240)	(20,200)
Income before income taxes	60,781	100,946	85,356
Income tax provision	(16,721)	(28,615)	(26,645)
Net income	$ 44,060	$ 72,331	$ 58,711
Weighted-average shares outstanding:
Basic	31,028	31,776	32,010
Diluted	31,298	32,010	32,278
Earnings per common share:
Basic	$ 1.42	$ 2.28	$ 1.83
Diluted	$ 1.41	$ 2.26	$ 1.82