Segment information - Selected Statement of Income Information Related to Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Revenues (net realized losses)	$ 601,714	$ 716,399	$ 1,675,172	$ 2,413,387
Depreciation and amortization	16,414	14,067	46,848	42,103
Income (loss) before taxes and noncontrolling interest	27,064	45,511	42,082	211,901
Title segment:
Segment Reporting Information [Line Items]
Revenues (net realized losses)	533,624	646,607	1,476,093	2,135,000
Depreciation and amortization	9,196	7,467	26,182	21,098
Income (loss) before taxes and noncontrolling interest	35,385	51,837	70,181	228,212
Real estate solutions segment:
Segment Reporting Information [Line Items]
Revenues (net realized losses)	68,215	69,738	202,250	241,993
Depreciation and amortization	6,820	6,204	19,401	19,381
Income (loss) before taxes and noncontrolling interest	2,626	3,364	7,273	16,249
Corporate and other segment:
Segment Reporting Information [Line Items]
Revenues (net realized losses)	(125)	54	(3,171)	36,394
Depreciation and amortization	398	396	1,265	1,624
Income (loss) before taxes and noncontrolling interest	$ (10,947)	$ (9,690)	$ (35,372)	$ (32,560)