Estimated title losses (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balances at beginning of period	$ 461,560	$ 480,990	$ 480,990
Provisions:
Current year	33,833	41,372
Previous policy years	640	(3,694)	4,000
Total provisions	34,473	37,678
Payments, net of recoveries:
Current year	(5,722)	(5,263)
Previous policy years	(39,929)	(33,590)
Total payments, net of recoveries	(45,651)	(38,853)
Effects of changes in foreign currency exchange rates	(174)	(4,355)
Balances at end of period	$ 450,208	$ 475,460	$ 461,560
Loss ratios as a percentage of title operating revenues:
Current year provisions	4.10%	4.60%
Total provisions	4.10%	4.20%