Disaggregation of Revenue - Schedule of disaggregation of revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue
Total revenues	$ 456,108	$ 294,802
Intercompany
Disaggregation of Revenue
Total revenues	(5,589)	(5,276)
Corporate
Disaggregation of Revenue
Total revenues	(5,589)	(5,276)
Corporate and Elimination
Disaggregation of Revenue
Total revenues	(5,589)	(5,276)
Enterprise Software | Intercompany
Disaggregation of Revenue
Total revenues	5,589	5,276
Enterprise Software | Operating segments
Disaggregation of Revenue
Total revenues	310,987	281,486
Platform Technologies | Intercompany
Disaggregation of Revenue
Total revenues	0	0
Platform Technologies | Operating segments
Disaggregation of Revenue
Total revenues	150,710	18,592
Recurring revenues
Disaggregation of Revenue
Total revenues	362,472	221,591
Recurring revenues | Corporate
Disaggregation of Revenue
Total revenues	0	0
Recurring revenues | Enterprise Software
Disaggregation of Revenue
Total revenues	231,011	208,798
Recurring revenues | Platform Technologies
Disaggregation of Revenue
Total revenues	131,461	12,793
Non-recurring revenues
Disaggregation of Revenue
Total revenues	93,636	73,211
Non-recurring revenues | Corporate
Disaggregation of Revenue
Total revenues	0	0
Non-recurring revenues | Enterprise Software
Disaggregation of Revenue
Total revenues	74,387	67,412
Non-recurring revenues | Platform Technologies
Disaggregation of Revenue
Total revenues	19,249	5,799
Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	21,184	16,231
Products and services transferred over time
Disaggregation of Revenue
Total revenues	434,924	278,571
Software licenses and royalties
Disaggregation of Revenue
Total revenues	16,506	14,933
Software licenses and royalties | Corporate
Disaggregation of Revenue
Total revenues	0	0
Software licenses and royalties | Enterprise Software
Disaggregation of Revenue
Total revenues	16,105	14,372
Software licenses and royalties | Platform Technologies
Disaggregation of Revenue
Total revenues	401	561
Software licenses and royalties | Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	14,069	12,058
Software licenses and royalties | Products and services transferred over time
Disaggregation of Revenue
Total revenues	2,437	2,875
Subscriptions
Disaggregation of Revenue
Total revenues	245,443	102,479
Subscriptions | Corporate
Disaggregation of Revenue
Total revenues	0	0
Subscriptions | Enterprise Software
Disaggregation of Revenue
Total revenues	120,316	99,329
Subscriptions | Platform Technologies
Disaggregation of Revenue
Total revenues	125,127	3,150
Subscriptions | Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	0	0
Subscriptions | Products and services transferred over time
Disaggregation of Revenue
Total revenues	245,443	102,479
Software services
Disaggregation of Revenue
Total revenues	61,497	47,640
Software services | Corporate
Disaggregation of Revenue
Total revenues	0	0
Software services | Enterprise Software
Disaggregation of Revenue
Total revenues	42,649	42,417
Software services | Platform Technologies
Disaggregation of Revenue
Total revenues	18,848	5,223
Software services | Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	0	0
Software services | Products and services transferred over time
Disaggregation of Revenue
Total revenues	61,497	47,640
Maintenance
Disaggregation of Revenue
Total revenues	117,029	119,112
Maintenance | Corporate
Disaggregation of Revenue
Total revenues	0	0
Maintenance | Enterprise Software
Disaggregation of Revenue
Total revenues	110,695	109,469
Maintenance | Platform Technologies
Disaggregation of Revenue
Total revenues	6,334	9,643
Maintenance | Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	0	0
Maintenance | Products and services transferred over time
Disaggregation of Revenue
Total revenues	117,029	119,112
Appraisal services
Disaggregation of Revenue
Total revenues	8,518	6,465
Appraisal services | Corporate
Disaggregation of Revenue
Total revenues	0	0
Appraisal services | Enterprise Software
Disaggregation of Revenue
Total revenues	8,518	6,465
Appraisal services | Platform Technologies
Disaggregation of Revenue
Total revenues	0	0
Appraisal services | Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	0	0
Appraisal services | Products and services transferred over time
Disaggregation of Revenue
Total revenues	8,518	6,465
Hardware and other
Disaggregation of Revenue
Total revenues	7,115	4,173
Hardware and other | Products and services transferred at a point in time
Disaggregation of Revenue
Total revenues	7,115	4,173
Hardware and other | Products and services transferred over time
Disaggregation of Revenue
Total revenues	$ 0	$ 0