Reserve for Known and Incurred but Not Reported Claims (Narrative) (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Reserve For Known And Incurred But Not Reported Claims [Line Items]
Known title claims, amount	$ 84,478			$ 84,478		$ 165,330
Decline in reserve for known title claims, amount				$ 80,900
Decline in reserve for known title claims, percentage				48.90%
Amount of payments to settle claims net of recovered through reinsurance		$ 35,000
Amount recovered through reinsurance		$ 21,000
Provision for title loss, percentage of title premiums and escrow fees	6.50%		6.70%	6.50%	7.20%
Ultimate loss rate	6.00%		6.00%
Estimated increase in loss reserve for prior policy years	$ 5,500		$ 6,800
Known title large claims
Reserve For Known And Incurred But Not Reported Claims [Line Items]
Known title claims, amount						$ 56,000