Segment Information (Schedule of Selected Financial Information) (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Revenues	$ 1,383,915	$ 1,259,730	$ 3,818,788	$ 3,422,498
Income (loss) before income taxes	115,396	115,952	315,966	227,663
Depreciation and amortization	21,072	24,127	63,389	63,879
Capital expenditures	32,238	25,999	94,274	66,062
Operating Segments \| Title Insurance and Services
Segment Reporting Information [Line Items]
Revenues	1,288,156	1,165,835	3,534,987	3,146,558
Income (loss) before income taxes	136,984	121,000	361,223	248,474
Depreciation and amortization	19,753	21,879	59,443	57,416
Capital expenditures	31,309	25,389	91,468	63,395
Operating Segments \| Specialty Insurance
Segment Reporting Information [Line Items]
Revenues	101,210	94,854	293,398	273,179
Income (loss) before income taxes	1,684	10,433	29,446	35,366
Depreciation and amortization	1,197	1,210	3,579	3,787
Capital expenditures	927	610	2,804	2,667
Corporate
Segment Reporting Information [Line Items]
Revenues	(5,428)	(571)	(9,148)	3,927
Income (loss) before income taxes	(23,272)	(15,481)	(74,703)	(56,177)
Depreciation and amortization	122	1,038	367	2,676
Capital expenditures	2		2
Eliminations
Segment Reporting Information [Line Items]
Revenues	$ (23)	$ (388)	$ (449)	$ (1,166)

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

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-Section 45

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Name Regulation S-X (SX)

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-Article 5

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Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

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