Segment information - Selected Statement of Operations and Income (Loss) Information Related to Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Revenues	$ 844,073	$ 818,809	$ 1,696,988	$ 1,507,395
Depreciation and amortization	14,288	6,819	28,037	13,249
(Loss) income before taxes	86,779	129,456	166,391	203,458
Title segment
Segment Reporting Information [Line Items]
Revenues	759,035	753,119	1,488,393	1,385,704
Depreciation and amortization	7,489	4,709	13,631	9,023
(Loss) income before taxes	93,595	125,671	176,375	202,760
Real estate solutions and abstract fees
Segment Reporting Information [Line Items]
Revenues	82,864	58,193	172,255	114,124
Depreciation and amortization	6,381	1,884	13,177	3,778
(Loss) income before taxes	6,095	2,212	12,886	4,869
Corporate and Other
Segment Reporting Information [Line Items]
Revenues	2,174	7,497	36,340	7,567
Depreciation and amortization	418	226	1,229	448
(Loss) income before taxes	$ (12,911)	$ 1,573	$ (22,870)	$ (4,171)