Estimated title losses - Estimated Title Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Loss Contingency Accrual
Balances at beginning of period	$ 549,448	$ 549,614	$ 496,275
Provisions:
Current year	66,818	95,442	121,164
Previous policy years	13,464	7,291	5,079
Total provisions	80,282	102,733	126,243
Payments, net of recoveries:
Current year	(19,209)	(20,966)	(16,727)
Previous policy years	(85,108)	(72,132)	(54,772)
Total payments, net of recoveries	(104,317)	(93,098)	(71,499)
Effects of changes in foreign currency exchange rates	2,856	(9,801)	(1,405)
Balances at end of period	$ 528,269	$ 549,448	$ 549,614
Loss ratios as a percentage of title operating revenues:
Current year provisions	3.40%	3.50%	4.00%
Total provisions	4.10%	3.80%	4.20%