CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Total revenues	$ 271,091	$ 275,124	$ 547,632	$ 522,190
Cost of revenues:
Total cost of revenues	139,888	147,264	287,298	278,282
Gross profit	131,203	127,860	260,334	243,908
Selling, general and administrative expenses	62,521	65,827	130,006	123,593
Research and development expense	21,949	20,101	44,310	39,042
Amortization of other intangibles	5,392	5,266	10,784	10,116
Operating income	41,341	36,666	75,234	71,157
Other income (expense), net	470	(247)	1,460	339
Income before income taxes	41,811	36,419	76,694	71,496
Income tax (benefit) provision	(12,081)	4,420	(24,748)	12,149
Net income	$ 53,892	$ 31,999	$ 101,442	$ 59,347
Earnings per common share:
Basic (usd per share)	$ 1.35	$ 0.83	$ 2.54	$ 1.54
Diluted (usd per share)	$ 1.30	$ 0.80	$ 2.44	$ 1.49
Software licenses and royalties
Revenues:
Total revenues	$ 17,025	$ 20,675	$ 35,762	$ 42,468
Cost of revenues:
Total cost of revenues	1,130	891	1,870	1,709
Subscriptions
Revenues:
Total revenues	85,638	73,475	167,361	140,750
Software services
Revenues:
Total revenues	43,654	57,401	95,787	105,844
Maintenance
Revenues:
Total revenues	116,760	106,689	231,125	206,841
Appraisal services
Revenues:
Total revenues	4,696	6,233	10,459	11,447
Cost of revenues:
Total cost of revenues	3,976	3,758	8,361	7,210
Hardware and other
Revenues:
Total revenues	3,318	10,651	7,138	14,840
Cost of revenues:
Total cost of revenues	2,489	8,868	4,968	11,774
Acquired software
Cost of revenues:
Total cost of revenues	8,006	7,988	16,033	14,670
Subscriptions, software services and maintenance
Cost of revenues:
Total cost of revenues	$ 124,287	$ 125,759	$ 256,066	$ 242,919