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- Definition

Entity Wide Revenue Major Business Segment Percentage

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- Definition

Large Claims, Minimum Threshold, Amount

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Operating Lease Expiration Period

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Reserve Amount, Threshold Range, Percentage

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- Definition

Short Term Investments, Maturity Period

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- Definition

Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

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-Topic 210

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For investments in debt and equity securities accounted for at cost, the excess of the carrying amount over net sale proceeds of investments disposed of during the period and any losses recognized thereon for impairments of other than a temporary nature.

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- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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General - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended	1 Months Ended
General - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 14, 2014	Oct. 31, 2014
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Revenue major segments percentage	50.00%
Percentage of voting rights owned in electing directors	50.00%
Threshold percentage, reserve amount	4.00%
Threshold amount for large claims	$ 1,000,000stc_LargeClaimsMinimumThresholdAmount
Cash equivalents, maturity period	3 months
Short-term investments, maturity period (less than)	1 year
Goodwill impairment write-off	0us-gaap_GoodwillImpairmentLoss	0us-gaap_GoodwillImpairmentLoss	0us-gaap_GoodwillImpairmentLoss
Cost-basis investments, aggregate amount	3,900,000us-gaap_CostMethodInvestments	5,100,000us-gaap_CostMethodInvestments
Cost-basis investments, impairment charges	1,000,000	1,000,000	800,000
Non-cancelable operating lease, expiration period	10 years
Convertible Notes Payable
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Convertible senior notes		$ 37,800,000		$ 27,200,000	$ 27,200,000
Convertible senior notes, shares issued during conversion (in shares)		3,094,440		2,100,000	2,111,017
Minimum
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets estimated life	3 years
Minimum \| Buildings
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Property and equipment, useful life	30 years
Minimum \| Furniture and equipment
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Property and equipment, useful life	3 years
Maximum
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets estimated life	10 years
Maximum \| Buildings
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Property and equipment, useful life	40 years
Maximum \| Furniture and equipment
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Property and equipment, useful life	10 years
Stewart Information Services Corporation and subsidiaries \| Minimum
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Percentage of voting rights owned in electing directors	20.00%
Stewart Information Services Corporation and subsidiaries \| Maximum
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Percentage of voting rights owned in electing directors	50.00%