Reinsurance (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Abstract]
Total amount of Premiums for assumed and ceded risks as a percentage of consolidated title revenue (less than)	1.00%	1.00%	1.00%