Segment information - Selected Statement of Operations and Income (Loss) Information Related to Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 852,916	$ 688,586
Depreciation and amortization	13,748	6,430
Income before taxes	79,611	74,002
Title segment
Segment Reporting Information [Line Items]
Revenues	729,359	632,585
Depreciation and amortization	6,141	4,314
Income before taxes	82,783	77,089
Real estate solutions and abstract fees
Segment Reporting Information [Line Items]
Revenues	89,391	55,931
Depreciation and amortization	6,796	1,894
Income before taxes	6,791	2,657
Corporate and Other
Segment Reporting Information [Line Items]
Revenues	34,166	70
Depreciation and amortization	811	222
Income before taxes	$ (9,963)	$ (5,744)