Schedule IV - Reinsurance (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Title Insurance and Services
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Premiums and escrow fees before reinsurance	$ 4,050,033	$ 3,590,673	$ 3,888,026
Ceded to other companies	23,776	28,727	27,483
Assumed from other companies	1,791	3,886	4,498
Premiums and escrow fees	$ 4,028,048	$ 3,565,832	$ 3,865,041
Percentage of amount assumed to premiums and escrow fees	0.00%	0.10%	0.10%
Specialty Insurance
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Premiums and escrow fees before reinsurance	$ 388,973	$ 363,044	$ 338,204
Ceded to other companies	8,709	9,232	9,010
Premiums and escrow fees	$ 380,264	$ 353,812	$ 329,194
Percentage of amount assumed to premiums and escrow fees	0.00%	0.00%	0.00%