CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue:
Total revenue	$ 1,906,715	$ 1,681,297	$ 1,515,892
Cost of sales:
Amortization	60,762	40,642	21,710
Total cost of sales	257,984	225,264	166,273
Gross profit	1,648,731	1,456,033	1,349,619
Operating expenses:
Selling, general and administrative	715,377	587,707	521,200
Research and development	404,870	355,371	298,210
Amortization	15,213	16,599	15,169
Total operating expenses	1,135,460	959,677	834,579
Operating income	513,271	496,356	515,040
Interest income	2,078	5,073	12,796
Interest expense	(12,405)	(10,988)	(3,461)
Other income (expense), net	12,410	3,484	(1,792)
Income before income tax provision	515,354	493,925	522,583
Income tax provision	60,727	60,038	71,288
Net income	$ 454,627	$ 433,887	$ 451,295
Earnings per share – basic:
Earnings per share	$ 5.22	$ 5.05	$ 5.36
Weighted average shares	87,100	85,840	84,259
Earnings per share – diluted:
Earnings per share	$ 5.16	$ 4.97	$ 5.25
Weighted average shares	88,102	87,288	85,925
Software licenses
Revenue:
Total revenue	$ 945,797	$ 780,850	$ 699,630
Cost of sales:
Cost of sales	38,156	30,618	23,944
Maintenance and service
Revenue:
Total revenue	960,918	900,447	816,262
Cost of sales:
Cost of sales	$ 159,066	$ 154,004	$ 120,619