Segment information - Selected Statement of Operations and Income (Loss) Information Related to Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 688,586	$ 439,901
Depreciation and amortization	6,430	4,231
Loss before taxes and noncontrolling interest	74,002	9,270
Title segment
Segment Reporting Information [Line Items]
Revenues	632,585	434,440
Depreciation and amortization	4,314	3,821
Loss before taxes and noncontrolling interest	77,089	14,836
Ancillary services and corporate segment
Segment Reporting Information [Line Items]
Revenues	56,001	5,461
Depreciation and amortization	2,116	410
Loss before taxes and noncontrolling interest	$ (3,087)	$ (5,566)