Schedule III - Income Statement Captions (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Supplementary Insurance Information By Segment [Line Items]
Premiums and escrow fees	$ 3,956,892		$ 4,229,326		$ 3,751,645
Net investment income	101,108	[1]	99,106	[1]	145,153	[1]
Loss provision	450,023		530,356		397,717
Amortization of deferred policy acquisition costs	1,868		(1,268)		1,066
Other operating expenses	833,681		885,805		836,319
Premiums written	364,782		344,433		312,696
Operating Segments | Title Insurance and Services
Supplementary Insurance Information By Segment [Line Items]
Premiums and escrow fees	3,603,080		3,900,132		3,455,592
Net investment income	83,635	[1]	79,940	[1]	101,495	[1]
Loss provision	253,122		343,461		237,427
Amortization of deferred policy acquisition costs	2,746		1,261		1,174
Other operating expenses	761,584		816,870		769,477
Operating Segments | Specialty Insurance
Supplementary Insurance Information By Segment [Line Items]
Premiums and escrow fees	353,812		329,194		296,053
Net investment income	12,594	[1]	8,767	[1]	17,513	[1]
Loss provision	196,901		186,895		160,290
Amortization of deferred policy acquisition costs	(878)		(2,529)		(108)
Other operating expenses	45,599		41,725		42,395
Premiums written	364,782		344,433		312,696
Corporate
Supplementary Insurance Information By Segment [Line Items]
Net investment income	6,415	[1]	13,008	[1]	29,892	[1]
Other operating expenses	26,528		27,264		24,462
Eliminations
Supplementary Insurance Information By Segment [Line Items]
Net investment income	(1,536)	[1]	(2,609)	[1]	(3,747)	[1]
Other operating expenses	$ (30)		$ (54)		$ (15)

[1] Net investment income includes net investment income, net realized investment gains and net other-than-temporary impairment losses.