Segment information - Selected Statement of Operations and Income Information Related to Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 3,069,296	$ 3,305,792	$ 2,288,432
Depreciation and amortization	57,178	36,386	19,216
Income (loss) before taxes and noncontrolling interest	232,652	433,971	218,505
Title
Segment Reporting Information [Line Items]
Revenues	2,733,744	3,002,949	2,205,301
Depreciation and amortization	29,715	21,227	15,230
Income (loss) before taxes and noncontrolling interest	255,132	440,462	246,878
Real estate solutions
Segment Reporting Information [Line Items]
Revenues	296,702	265,497	82,632
Depreciation and amortization	25,563	14,071	2,995
Income (loss) before taxes and noncontrolling interest	16,624	12,951	(1,594)
Corporate and other
Segment Reporting Information [Line Items]
Revenues	38,850	37,346	499
Depreciation and amortization	1,900	1,088	991
Income (loss) before taxes and noncontrolling interest	$ (39,104)	$ (19,442)	$ (26,779)