CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue:
Total revenue	$ 446,654	$ 385,661	$ 809,880	$ 690,646
Cost of sales:
Amortization	15,025	9,764	29,974	19,316
Total cost of sales	64,158	53,860	126,261	103,976
Gross profit	382,496	331,801	683,619	586,670
Operating expenses:
Selling, general and administrative	160,410	128,698	306,625	259,220
Research and development	100,879	86,133	201,358	172,245
Amortization	4,434	4,163	8,841	8,325
Total operating expenses	265,723	218,994	516,824	439,790
Operating income	116,773	112,807	166,795	146,880
Interest income	486	934	1,003	3,709
Interest expense	(3,336)	(3,040)	(6,651)	(6,691)
Other income, net	14,937	1,884	15,336	2,011
Income before income tax provision	128,860	112,585	176,483	145,909
Income tax provision	35,144	16,021	10,369	3,281
Net income	$ 93,716	$ 96,564	$ 166,114	$ 142,628
Earnings per share – basic:
Earnings per share	$ 1.08	$ 1.13	$ 1.91	$ 1.66
Weighted average shares	87,168	85,651	86,988	85,724
Earnings per share – diluted:
Earnings per share	$ 1.06	$ 1.11	$ 1.89	$ 1.64
Weighted average shares	88,053	86,934	88,019	87,152
Software licenses
Revenue:
Total revenue	$ 214,822	$ 169,341	$ 347,426	$ 257,171
Cost of sales:
Total cost of sales	8,065	8,511	15,671	13,437
Maintenance and service
Revenue:
Total revenue	231,832	216,320	462,454	433,475
Cost of sales:
Total cost of sales	$ 41,068	$ 35,585	$ 80,616	$ 71,223