Estimated title losses - Estimated Title Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Loss Contingency Accrual
Balances at beginning of period	$ 549,614	$ 496,275	$ 459,053
Provisions:
Current year	95,442	121,164	98,823
Previous policy years	7,291	5,079	16,401
Total provisions	102,733	126,243	115,224
Payments, net of recoveries:
Current year	(20,966)	(16,727)	(15,455)
Previous policy years	(72,132)	(54,772)	(66,540)
Total payments, net of recoveries	(93,098)	(71,499)	(81,995)
Effects of changes in foreign currency exchange rates	(9,801)	(1,405)	3,993
Balances at end of period	$ 549,448	$ 549,614	$ 496,275
Loss ratios as a percentage of title operating revenues:
Current year provisions	3.50%	4.00%	4.50%
Total provisions	3.80%	4.20%	5.30%