Reserve for Known and Incurred but Not Reported Claims (Summary of Loss Reserves) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Insurance [Abstract]
Known title claims, amount	$ 159,148	$ 133,070
IBNR, amount	853,031	805,430
Total title claims, amount	1,012,179	938,500
Non-title claims, amount	41,858	37,962
Total loss reserves, amount	$ 1,054,037	$ 976,462
Known title claims, percentage	15.10%	13.60%
IBNR, percentage	80.90%	82.50%
Total title claims, percentage	96.00%	96.10%
Non-title claims, percentage	4.00%	3.90%
Total loss reserves, percentage	100.00%	100.00%