Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Operating revenues	$ 434,197	$ 438,081
Title insurance premiums, Direct
Disaggregation of Revenue [Line Items]
Operating revenues	132,761	131,001
Title insurance premiums, Agency
Disaggregation of Revenue [Line Items]
Operating revenues	236,854	233,349
Escrow fees
Disaggregation of Revenue [Line Items]
Operating revenues	27,867	32,763
Search, abstract and valuation services
Disaggregation of Revenue [Line Items]
Operating revenues	21,787	28,170
Other revenues
Disaggregation of Revenue [Line Items]
Operating revenues	$ 14,928	$ 12,798