CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Total revenues	$ 459,873	$ 285,746	$ 1,158,750	$ 833,378
Cost of revenues:
Total cost of revenues	263,657	142,237	636,266	429,535
Gross profit	196,216	143,509	522,484	403,843
Selling, general and administrative expenses	101,847	66,819	289,543	196,825
Research and development expense	24,002	21,642	69,243	65,952
Amortization of other intangibles	14,183	5,392	31,015	16,176
Operating income	56,184	49,656	132,683	124,890
Interest expense	(5,396)	(254)	(18,311)	(757)
Other income, net	445	534	1,249	2,497
Income before income taxes	51,233	49,936	115,621	126,630
Income tax provision (benefit)	7,063	10,652	8,945	(14,096)
Net income	$ 44,170	$ 39,284	$ 106,676	$ 140,726
Earnings per common share:
Basic (usd per share)	$ 1.08	$ 0.98	$ 2.61	$ 3.52
Diluted (usd per share)	$ 1.04	$ 0.94	$ 2.53	$ 3.39
Software licenses and royalties
Revenues:
Total revenues	$ 22,673	$ 19,937	$ 55,210	$ 55,699
Cost of revenues:
Total cost of revenues	1,547	1,177	4,151	3,047
Subscriptions
Revenues:
Total revenues	252,942	89,290	554,979	256,651
Software services
Revenues:
Total revenues	54,624	47,946	155,601	143,733
Maintenance
Revenues:
Total revenues	117,833	117,979	356,566	349,104
Appraisal services
Revenues:
Total revenues	7,146	5,394	19,876	15,853
Cost of revenues:
Total cost of revenues	4,506	3,434	13,552	11,795
Hardware and other
Revenues:
Total revenues	4,655	5,200	16,518	12,338
Cost of revenues:
Total cost of revenues	2,764	3,780	9,845	8,748
Acquired software
Cost of revenues:
Total cost of revenues	12,896	7,965	32,683	23,998
Subscriptions, software services and maintenance
Cost of revenues:
Total cost of revenues	$ 241,944	$ 125,881	$ 576,035	$ 381,947