Estimated title losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balances at beginning of period	$ 496,275	$ 459,053
Provisions:
Current year	28,407	18,521
Previous policy years	366	111
Total provisions	28,773	18,632
Payments, net of recoveries:
Current year	(3,606)	(2,214)
Previous policy years	(12,933)	(19,227)
Total payments, net of recoveries	(16,539)	(21,441)
Effects of changes in foreign currency exchange rates	1,032	(8,662)
Balances at end of period	$ 509,541	$ 447,582
Loss ratios as a percentage of title operating revenues:
Current year provisions	4.50%	4.20%
Total provisions	4.60%	4.20%