Disaggregation of Revenue - Schedule of disaggregation of revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue
Total revenues	$ 473,191	$ 459,873	$ 1,397,983	$ 1,158,750
Intercompany
Disaggregation of Revenue
Total revenues	(5,541)	(5,142)	(16,472)	(16,039)
Corporate
Disaggregation of Revenue
Total revenues	(3,392)	(5,054)	(10,713)	(13,012)
Corporate and Elimination
Disaggregation of Revenue
Total revenues	(3,392)	(5,054)	(10,713)	(13,012)
Enterprise Software \| Intercompany
Disaggregation of Revenue
Total revenues	5,541	5,142	16,472	16,039
Enterprise Software \| Operating segments
Disaggregation of Revenue
Total revenues	327,879	295,535	954,435	864,804
Platform Technologies \| Intercompany
Disaggregation of Revenue
Total revenues	0	0	0	0
Platform Technologies \| Operating segments
Disaggregation of Revenue
Total revenues	148,704	169,392	454,261	306,958
Recurring revenues
Disaggregation of Revenue
Total revenues	371,684	370,775	1,106,786	911,545
Recurring revenues \| Corporate
Disaggregation of Revenue
Total revenues	0	0	0	0
Recurring revenues \| Enterprise Software
Disaggregation of Revenue
Total revenues	246,823	216,321	717,287	637,551
Recurring revenues \| Platform Technologies
Disaggregation of Revenue
Total revenues	124,861	154,454	389,499	273,994
Non-recurring revenues
Disaggregation of Revenue
Total revenues	101,507	89,098	291,197	247,205
Non-recurring revenues \| Corporate
Disaggregation of Revenue
Total revenues	2,149	88	5,759	3,027
Non-recurring revenues \| Enterprise Software
Disaggregation of Revenue
Total revenues	75,515	74,072	220,676	211,214
Non-recurring revenues \| Platform Technologies
Disaggregation of Revenue
Total revenues	23,843	14,938	64,762	32,964
Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	28,488	23,825	71,463	62,501
Products and services transferred over time
Disaggregation of Revenue
Total revenues	444,703	436,048	1,326,520	1,096,249
Software licenses and royalties
Disaggregation of Revenue
Total revenues	20,269	22,673	51,784	55,210
Software licenses and royalties \| Corporate
Disaggregation of Revenue
Total revenues	0	0	0	0
Software licenses and royalties \| Enterprise Software
Disaggregation of Revenue
Total revenues	17,165	21,201	47,893	51,812
Software licenses and royalties \| Platform Technologies
Disaggregation of Revenue
Total revenues	3,104	1,472	3,891	3,398
Software licenses and royalties \| Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	19,068	19,170	45,820	45,983
Software licenses and royalties \| Products and services transferred over time
Disaggregation of Revenue
Total revenues	1,201	3,503	5,964	9,227
Subscriptions
Disaggregation of Revenue
Total revenues	254,346	252,942	755,604	554,979
Subscriptions \| Corporate
Disaggregation of Revenue
Total revenues	0	0	0	0
Subscriptions \| Enterprise Software
Disaggregation of Revenue
Total revenues	135,337	106,841	384,346	308,787
Subscriptions \| Platform Technologies
Disaggregation of Revenue
Total revenues	119,009	146,101	371,258	246,192
Subscriptions \| Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	0	0	0	0
Subscriptions \| Products and services transferred over time
Disaggregation of Revenue
Total revenues	254,346	252,942	755,604	554,979
Professional services
Disaggregation of Revenue
Total revenues	63,180	54,624	187,802	155,601
Professional services \| Corporate
Disaggregation of Revenue
Total revenues	0	0	0	0
Professional services \| Enterprise Software
Disaggregation of Revenue
Total revenues	42,441	41,169	126,931	126,064
Professional services \| Platform Technologies
Disaggregation of Revenue
Total revenues	20,739	13,455	60,871	29,537
Professional services \| Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	0	0	0	0
Professional services \| Products and services transferred over time
Disaggregation of Revenue
Total revenues	63,180	54,624	187,802	155,601
Maintenance
Disaggregation of Revenue
Total revenues	117,338	117,833	351,182	356,566
Maintenance \| Corporate
Disaggregation of Revenue
Total revenues	0	0	0	0
Maintenance \| Enterprise Software
Disaggregation of Revenue
Total revenues	111,486	109,480	332,941	328,764
Maintenance \| Platform Technologies
Disaggregation of Revenue
Total revenues	5,852	8,353	18,241	27,802
Maintenance \| Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	0	0	0	0
Maintenance \| Products and services transferred over time
Disaggregation of Revenue
Total revenues	117,338	117,833	351,182	356,566
Appraisal services
Disaggregation of Revenue
Total revenues	8,638	7,146	25,968	19,876
Appraisal services \| Corporate
Disaggregation of Revenue
Total revenues	0	0	0	0
Appraisal services \| Enterprise Software
Disaggregation of Revenue
Total revenues	8,638	7,146	25,968	19,876
Appraisal services \| Platform Technologies
Disaggregation of Revenue
Total revenues	0	0	0	0
Appraisal services \| Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	0	0	0	0
Appraisal services \| Products and services transferred over time
Disaggregation of Revenue
Total revenues	8,638	7,146	25,968	19,876
Hardware and other
Disaggregation of Revenue
Total revenues	9,420	4,655	25,643	16,518
Hardware and other \| Corporate
Disaggregation of Revenue
Total revenues	2,149	88	5,759	3,027
Hardware and other \| Enterprise Software
Disaggregation of Revenue
Total revenues	7,271	4,556	19,884	13,462
Hardware and other \| Platform Technologies
Disaggregation of Revenue
Total revenues	0	11	0	29
Hardware and other \| Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	9,420	4,655	25,643	16,518
Hardware and other \| Products and services transferred over time
Disaggregation of Revenue
Total revenues	$ 0	$ 0	$ 0	$ 0