Segment information - Selected Statement of Income Information Related to Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Revenues (net realized losses)	$ 549,154	$ 844,073	$ 1,073,456	$ 1,696,988
Depreciation and amortization	15,528	14,288	30,434	28,037
Income (loss) before taxes and noncontrolling interest	25,174	86,779	15,018	166,391
Title segment:
Segment Reporting Information [Line Items]
Revenues (net realized losses)	480,825	759,035	942,468	1,488,393
Depreciation and amortization	8,883	7,489	16,986	13,631
Income (loss) before taxes and noncontrolling interest	35,459	93,595	34,794	176,375
Real estate solutions segment:
Segment Reporting Information [Line Items]
Revenues (net realized losses)	71,411	82,864	134,035	172,255
Depreciation and amortization	6,280	6,381	12,581	13,177
Income (loss) before taxes and noncontrolling interest	3,282	6,095	4,648	12,886
Corporate and other segment:
Segment Reporting Information [Line Items]
Revenues (net realized losses)	(3,082)	2,174	(3,047)	36,340
Depreciation and amortization	365	418	867	1,229
Income (loss) before taxes and noncontrolling interest	$ (13,567)	$ (12,911)	$ (24,424)	$ (22,870)