Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Total revenues	$ 1,592,287	$ 1,116,663	$ 1,086,427
Cost of revenues:
Total cost of revenues	882,643	574,151	569,527
Gross profit	709,644	542,512	516,900
Selling, general and administrative expenses	390,579	259,561	257,746
Research and development expense	93,481	88,363	81,342
Amortization of customer and trade name intangibles	44,849	21,662	21,445
Operating income	180,735	172,926	156,367
Interest expense	(23,298)	(1,013)	(2,027)
Other income, net	1,544	3,129	5,498
Income before income taxes	158,981	175,042	159,838
Income tax (benefit) provision	(2,477)	(19,778)	13,311
Net income	$ 161,458	$ 194,820	$ 146,527
Earnings per common share:
Basic (USD per share)	$ 3.95	$ 4.87	$ 3.79
Diluted (USD per share)	$ 3.82	$ 4.69	$ 3.65
Software licenses and royalties
Revenues:
Total revenues	$ 74,452	$ 73,164	$ 100,205
Cost of revenues:
Total cost of revenues	5,877	3,339	3,938
Subscriptions
Revenues:
Total revenues	784,435	350,648	296,352
Software services
Revenues:
Total revenues	209,391	186,409	213,061
Maintenance
Revenues:
Total revenues	474,287	467,513	430,318
Acquired software
Cost of revenues:
Total cost of revenues	45,601	31,962	30,642
Subscriptions, software services and maintenance
Cost of revenues:
Total cost of revenues	799,158	510,504	502,138
Appraisal services
Revenues:
Total revenues	27,788	21,127	23,479
Cost of revenues:
Total cost of revenues	19,061	15,945	15,337
Hardware and other
Revenues:
Total revenues	21,934	17,802	23,012
Cost of revenues:
Total cost of revenues	$ 12,946	$ 12,401	$ 17,472