Statement of Stockholders' Equity [Abstract]
Cash dividends on common stock (in usd per share)
Common Stock, Dividends, Per Share, Cash Paid
Leases [Abstract]
Operating lease expense
Operating Lease, Cost
Short-term lease expense
Short-term Lease, Cost
Total finance lease expense
Finance Lease, Cost
Finance Lease, Cost
Commitments and Contingencies Disclosure [Abstract]
Regulatory and legal developments
Legal Matters and Contingencies [Text Block]
Leases
Lessee, Operating Leases [Text Block]
Leases
Lessee, Finance Leases [Text Block]
Segment Reporting [Abstract]
Number of operating segments
Number of Operating Segments
Gain realized from termination fee paid by FNF
Gain (Loss) on Contract Termination
Statement [Table]
Statement [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Common Stock
Common Stock [Member]
Additional paid-in capital
Additional Paid-in Capital [Member]
Retained earnings
Retained Earnings [Member]
Accumulated other comprehensive loss
AOCI Attributable to Parent [Member]
Treasury stock
Treasury Stock [Member]
Noncontrolling interests
Noncontrolling Interest [Member]
Statement [Line Items]
Statement [Line Items]
Increase (Decrease) in Stockholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balances at beginning of period
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Cumulative effect adjustments on adoption of new accounting standards
Cumulative Effect of New Accounting Principle in Period of Adoption
Net income attributable to Stewart
Net Income (Loss) Attributable to Parent
Dividends on Common Stock
Dividends, Common Stock, Cash
Stock-based compensation
APIC, Share-based Payment Arrangement, Increase for Cost Recognition
Stock repurchases
Stock Repurchased and Retired During Period, Value
Purchase of remaining interest in consolidated subsidiary
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests
Net change in unrealized gains and losses on investments, net of taxes
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax
Net investment realized loss (gain) reclassification, net of taxes
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax
Foreign currency translation adjustments, net of taxes
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Net income attributable to noncontrolling interests
Net Income (Loss) Attributable to Noncontrolling Interest
Distributions to noncontrolling interests
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders
Net effect of other changes in ownership
Noncontrolling Interest in Net Income (Loss) Other Noncontrolling Interests, Redeemable
Balances at end of period
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Title segment
Title [Member]
Title.
Ancillary services and corporate segment
Ancillary Services And Corporate [Member]
Ancillary Services and Corporate
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Revenues
Revenues
Depreciation and amortization
Depreciation, Depletion and Amortization, Nonproduction
Segment information
Segment Reporting Disclosure [Text Block]
Earnings Per Share [Abstract]
Schedule of earnings per share, basic and diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Investments, Debt and Equity Securities [Abstract]
Investment and other gains
Realized And Unrealized Investment Gain
Realized And Unrealized Investment Gain
Investment and other losses
Realized And Unrealized Investment Loss
Realized And Unrealized Investment Loss
Net unrealized investment (losses) gains recognized on equity securities still held at September 30
Equity Securities, FV-NI, Unrealized Gain (Loss)
Investment and other gains (losses) – net
Other Nonoperating Gains (Losses)
Investment and other gains - net
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
Income Statement [Abstract]
Product and Service [Axis]
Product and Service [Axis]
Product and Service [Domain]
Product and Service [Domain]
Title - Direct operations
Title - Direct Operations [Member]
Title - Direct Operations [Member]
Title - Agency operations
Title - Agency Operations [Member]
Title - Agency Operations [Member]
Ancillary services
Ancillary Services [Member]
Ancillary Services [Member]
Operating revenues
Products And Services From Operations [Member]
Products And Services From Operations [Member]
Revenues
Revenues [Abstract]
Investment income
Net Investment Income
Investment and other gains – net
Expenses
Benefits, Losses and Expenses [Abstract]
Amounts retained by agencies
Insurance Commissions
Employee costs
Labor and Related Expense
Other operating expenses
Other Cost and Expense, Operating
Title losses and related claims
Policyholder Benefits and Claims Incurred, Net
Interest
Interest Expense
Total expenses
Benefits, Losses and Expenses
Income tax expense
Income Tax Expense (Benefit)
Net income
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Less net income attributable to noncontrolling interests
Net income attributable to Stewart
Net income
Other comprehensive (loss) income, net of taxes:
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Foreign currency translation adjustments
Change in net unrealized gains and losses on investments
Reclassification adjustment for net losses (gains) included in net income
Other comprehensive (loss) income, net of taxes:
Other Comprehensive Income (Loss), Net of Tax
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Less net income attributable to noncontrolling interests
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest
Comprehensive income attributable to Stewart
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Basic average shares outstanding (in shares)
Weighted Average Number of Shares Outstanding, Basic
Basic earnings per share attributable to Stewart (in usd per share)
Earnings Per Share, Basic
Diluted average shares outstanding (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Diluted earnings per share attributable to Stewart (in usd per share)
Earnings Per Share, Diluted
Debt Securities, Available-for-sale [Table]
Debt Securities, Available-for-sale [Table]
Financial Instrument [Axis]
Financial Instrument [Axis]
Financial Instruments [Domain]
Financial Instruments [Domain]
Municipal
US States and Political Subdivisions Debt Securities [Member]
Corporate
Corporate Debt Securities [Member]
Foreign
Debt Security, Government, Non-US [Member]
U.S. Treasury Bonds
US Government Agencies Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale [Line Items]
Losses
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
More than 12 months
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Total
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss
Fair values
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Less than 12 months
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months
More than 12 months
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer
Total
Debt Securities, Available-for-sale, Unrealized Loss Position
Operating
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2019 (excludes the nine months ended September 30, 2019)
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year
2020
Lessee, Operating Lease, Liability, Payments, Due Year Two
2021
Lessee, Operating Lease, Liability, Payments, Due Year Three
2022
Lessee, Operating Lease, Liability, Payments, Due Year Four
2023
Lessee, Operating Lease, Liability, Payments, Due Year Five
Thereafter
Lessee, Operating Lease, Liability, Payments, Due after Year Five
Total future minimum lease payments
Lessee, Operating Lease, Liability, Payments, Due
Less: imputed interest
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Net future minimum lease payments
Operating Lease, Liability
Finance
Finance Lease, Liability, Payment, Due [Abstract]
2019 (excludes the nine months ended September 30, 2019)
Finance Lease, Liability, Payments, Remainder of Fiscal Year
2020
Finance Lease, Liability, Payments, Due Year Two
2021
Finance Lease, Liability, Payments, Due Year Three
2022
Finance Lease, Liability, Payments, Due Year Four
2023
Finance Lease, Liability, Payments, Due Year Five
Thereafter
Finance Lease, Liability, Payments, Due after Year Five
Total future minimum lease payments
Finance Lease, Liability, Payment, Due
Less: imputed interest
Finance Lease, Liability, Undiscounted Excess Amount
Net future minimum lease payments
Finance Lease, Liability
Selected statement of operations and income (loss) information related to segments
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Revenues generated in domestic and all international operations
Revenue from External Customers by Geographic Areas [Table Text Block]
Share-based Payment Arrangement [Abstract]
Share-based payments
Share-based Payment Arrangement [Text Block]
Insurance [Abstract]
Estimated title losses
Insurance Disclosure [Text Block]
Equity [Abstract]
Other comprehensive (loss) income
Comprehensive Income (Loss) Note [Text Block]
Proceeds from sales of debt securities
Proceeds from Sale of Debt Securities, Available-for-sale
Proceeds from sales of equity securities
Proceeds From Sale Of Equity Securities
Proceeds From Sale Of Equity Securities
Total proceeds from sales of investments in securities
Proceeds From Sale Of Investment Securities
Proceeds From Sale Of Investment Securities
Schedule of lease-related assets and liabilities
Assets And Liabilities, Lessee [Table Text Block]
Assets And Liabilities, Lessee [Table Text Block]
Future minimum lease payments under non-cancellable operating lease
Finance Lease, Liability, Maturity [Table Text Block]
Future minimum lease payments under non-cancellable finance lease
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Future minimum lease payments under operating and finance leases
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Statement of Financial Position [Abstract]
Assets
Assets [Abstract]
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Short-term investments
Short-term Investments
Investments in debt and equity securities, at fair value
Investments In Debt And Equity Securities
Investments In Debt And Equity Securities
Receivables:
Premiums and Other Receivables, Net [Abstract]
Premiums from agencies
Premiums Receivable, Gross
Trade and other
Trade and Other Receivables
Trade and Other Receivables
Income taxes
Income Taxes Receivable
Notes
Financing Receivable, before Allowance for Credit Loss
Allowance for uncollectible amounts
Allowance for Doubtful Accounts, Premiums and Other Receivables
Total receivables
Premiums and Other Receivables, Net
Property and equipment:
Property, Plant and Equipment, Net [Abstract]
Land
Land
Buildings
Buildings and Improvements, Gross
Furniture and equipment
Furniture and Fixtures, Gross
Accumulated depreciation
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Total property and equipment, at cost
Property, Plant and Equipment, Net
Operating lease assets
Operating Lease, Right-of-Use Asset
Title plants, at cost
Title Plants At Cost
Title plants, at cost
Investments on equity method basis
Equity Method Investments
Goodwill
Goodwill
Intangible assets, net of amortization
Intangible Assets, Net (Excluding Goodwill)
Deferred tax assets
Deferred Tax Assets, Net of Valuation Allowance
Other assets
Other Assets
Total assets
Assets
Liabilities
Liabilities [Abstract]
Notes payable
Notes Payable
Accounts payable and accrued liabilities
Accounts Payable and Accrued Liabilities
Operating lease liabilities
Estimated title losses
Liability for Claims and Claims Adjustment Expense
Deferred tax liabilities
Deferred Tax Liabilities, Gross
Total liabilities
Liabilities
Contingent liabilities and commitments
Commitments and Contingencies
Stockholders’ equity
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common Stock ($1 par value) and additional paid-in capital
Common Stock Including Additional Paid In Capital
Common Stock Including Additional Paid In Capital
Retained earnings
Retained Earnings (Accumulated Deficit)
Accumulated other comprehensive income (loss):
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net unrealized investment gains (losses) on debt securities investments
AOCI, Debt Securities, Available-for-sale, Adjustment, after Tax
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax
Treasury stock – 352,161 common shares, at cost
Treasury Stock, Value
Stockholders’ equity attributable to Stewart
Stockholders' Equity Attributable to Parent
Noncontrolling interests
Stockholders' Equity Attributable to Noncontrolling Interest
Total stockholders’ equity (23,711,652 and 23,719,347 shares outstanding)
Total liabilities and stockholders' equity
Liabilities and Equity
Corporate
Foreign
U.S. Treasury Bonds
Gains
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax
Losses
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax
Operating
Lessee, Operating Lease, Description [Abstract]
Cash paid for amounts included in the measurement of lease liabilities
Operating Lease, Payments
Lease assets obtained in exchange for lease obligations
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Weighted average remaining lease term (years)
Operating Lease, Weighted Average Remaining Lease Term
Weighted average discount rate
Operating Lease, Weighted Average Discount Rate, Percent
Finance
Lessee, Finance Lease, Description [Abstract]
Cash paid for amounts included in the measurement of lease liabilities
Finance Lease, Payments
Finance Lease, Payments
Lease assets obtained in exchange for lease obligations
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability
Weighted average remaining lease term (years)
Finance Lease, Weighted Average Remaining Lease Term
Weighted average discount rate
Finance Lease, Weighted Average Discount Rate, Percent
Net unrealized investment gains on equity securities held
Equity Securities, Accumulated Unrealized Gain (Loss)
Equity Securities, Accumulated Unrealized Gain (Loss)
Number of investments in an unrealized loss position
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions
Number of investments in an unrealized loss positions for more than 12 months
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balances at beginning of period
Provisions:
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Current year
Current Year Claims and Claims Adjustment Expense
Previous policy years
Prior Year Claims and Claims Adjustment Expense
Total provisions
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims
Payments, net of recoveries:
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Current year
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year
Previous policy years
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years
Total payments, net of recoveries
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid
Effects of changes in foreign currency exchange rates
Liability for Unpaid Claims and Claims Adjustment Expense, Foreign Currency Translation Gain (Loss)
Balances at end of period
Loss ratios as a percentage of title operating revenues:
Liability for Unpaid Claims and Claims Adjustment Expense, as a Percentage of Operating Revenues [Abstract]
Liability for Unpaid Claims and Claims Adjustment Expense, as a Percentage of Operating Revenues [Abstract]
Current year provisions
Current Year Claims and Claims Adjustment Expense, Ratio
Current Year Claims and Claims Adjustment Expense, Ratio
Total provisions
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims, Ratio
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims, Ratio
Accounting Policies [Abstract]
Investments restricted for statutory reserve funds
Statutory Surplus Reserve Fund Balance
Statutory Surplus Reserve Fund Balance
Restricted cash and cash equivalent
Restricted Cash and Cash Equivalents
Statement of Cash Flows [Abstract]
Reconciliation of net income to cash provided by operating activities:
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
Net income
Add (deduct):
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization
Provision for bad debt
Accounts Receivable, Credit Loss Expense (Reversal)
Investment and other gains – net
Noncash Investment And Other Gains (Losses)
Noncash Investment And Other Gains (Losses)
Amortization of net premium on debt securities investments
Accretion (Amortization) of Discounts and Premiums, Investments
Payments for title losses in excess of provisions
Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve
Adjustment for insurance recoveries of title losses
Adjustments For Insurance Recoveries Of Title Losses
Adjustments For Insurance Recoveries Of Title Losses
(Increase) decrease in receivables – net
Increase (Decrease) in Receivables
Decrease (increase) in other assets – net
Increase (Decrease) in Other Operating Assets
Increase (decrease) in accounts payable and other liabilities – net
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Change in net deferred income taxes
Increase (Decrease) in Deferred Income Taxes
Net income from equity investees
Income (Loss) from Equity Method Investments
Dividends received from equity investees
Proceeds from Equity Method Investment, Distribution
Stock-based compensation expense
Share-based Payment Arrangement, Noncash Expense
Other – net
Other Noncash Income (Expense)
Cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Investing activities:
Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]
Proceeds from sales of investments in securities
Proceeds from matured investments in debt securities
Proceeds From Maturity Of Investment Securities
Proceeds From Maturity Of Investment Securities
Purchases of investments in securities
Payments to Acquire Investments
Net purchases of short-term investments
Payments for (Proceeds from) Short-term Investments
Purchases of property and equipment, and real estate – net
Payments to Acquire Productive Assets
Cash paid for acquisition of businesses
Payments to Acquire Businesses, Net of Cash Acquired
Other – net
Payments for (Proceeds from) Other Investing Activities
Cash provided (used) by investing activities
Net Cash Provided by (Used in) Investing Activities
Financing activities:
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Payments on notes payable
Repayments of Notes Payable
Proceeds from notes payable
Proceeds from Notes Payable
Distributions to noncontrolling interests
Payments to Noncontrolling Interests
Contributions from noncontrolling interests
Proceeds from Noncontrolling Interests
Repurchases of common stock
Payments for Repurchase of Common Stock
Cash dividends paid
Payments of Ordinary Dividends, Common Stock
Purchase of remaining interest in consolidated subsidiary
Payments to Acquire Additional Interest in Subsidiaries
Cash used by financing activities
Net Cash Provided by (Used in) Financing Activities
Effects of changes in foreign currency exchange rates
Effect of Exchange Rate on Cash and Cash Equivalents
Increase (decrease) in cash and cash equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Management's responsibility
Basis of Accounting, Policy [Policy Text Block]
Consolidation
Consolidation, Policy [Policy Text Block]
Restrictions on cash and investments
Regulatory Requirements For Restricted Cash And Investments [Policy Text Block]
Regulatory Requirements For Restricted Cash And Investments [Policy Text Block]
Recently adopted accounting standard and Recent accounting standard not yet adopted
New Accounting Pronouncements, Policy [Policy Text Block]
Municipal
Amortized costs
Debt Securities, Available-for-sale, Amortized Cost
Fair values
Debt Securities, Available-for-sale
New Accounting Pronouncements or Change in Accounting Principle [Table]
New Accounting Pronouncements or Change in Accounting Principle [Table]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
ASU 2016-02
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets
Lease liabilities
Accounts payable and accrued liabilities
Revenue from Contract with Customer [Abstract]
Revenues
Revenue from Contract with Customer [Text Block]
Guarantee of indebtedness, relating to unused letters of credit
Contingent Liabilities For Guarantees Of Consolidated Subsidiaries, Unused Letters of Credit
Contingent liabilities for guarantees of consolidated subsidiaries, unused letters of credit.
Contingent liabilities and commitments
Commitments and Contingencies Disclosure [Text Block]
Earnings per share
Earnings Per Share [Text Block]
Net investment (losses) gains recognized on equity securities during the period
Equity Securities, FV-NI, Gain (Loss)
Less: Net realized gains on equity securities sold during the period
Equity Securities, FV-NI, Realized Gain (Loss)
Net unrealized investment (losses) gains recognized on equity securities still held at September 30
Impairment charge on equity method investment
Equity Method Investment, Other than Temporary Impairment
Net unrealized gain of equity investment
Equity Securities, FV-NI, Unrealized Gain
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Award Type [Domain]
Time-Based Restricted Shares
Time-Based Restricted Stock [Member]
Time-Based Restricted Stock [Member]
Performance-Based Shares
Performance Shares [Member]
Restricted Stock Units
Restricted Stock Units (RSUs) [Member]
Restricted Stock Awards
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Aggregate fair values at grant date
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Granted In Period, Fair Value
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Granted In Period, Fair Value
Share-based incentives, shares issued
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Average grant price (in usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Investments in debt and equity securities
Interim financial statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Title insurance premiums, Direct
Title Insurance Premiums, Direct [Member]
Title Insurance Premiums, Direct [Member]
Title insurance premiums, Agency
Title Insurance Premiums, Agency [Member]
Title Insurance Premiums, Agency [Member]
Escrow fees
Escrow Fees [Member]
Escrow Fees [Member]
Search, abstract and valuation services
Search, Abstract And Valuation Services [Member]
Search, Abstract And Valuation Services [Member]
Other revenues
Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Summary of operating revenues
Disaggregation of Revenue [Table Text Block]
Debt securities
Equity securities
Equity Securities, FV-NI
Investments in debt and equity securities
Accumulated Other comprehensive (loss) income [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Net unrealized (losses) gains on investments
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Including Noncontrolling Interest [Member]
Foreign currency translation adjustments
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other comprehensive (loss) income [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before-Tax Amount
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract]
Change in net unrealized gains and losses on investments
Other Comprehensive Income (Loss), before Reclassifications, before Tax
Less: reclassification adjustment for net losses (gains) included in net income
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax
Other comprehensive income (loss)
Other Comprehensive Income (Loss), before Tax
Tax Expense (Benefit)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract]
Change in net unrealized gains and losses on investments
Other Comprehensive Income (Loss) before Reclassifications, Tax
Less: reclassification adjustment for net losses (gains) included in net income
Reclassification from AOCI, Current Period, Tax
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Tax
Net-of-Tax Amount
Change in net unrealized gains and losses on investments
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Less: reclassification adjustment for net gains included in net income
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Numerator:
Net Income (Loss) Attributable to Parent [Abstract]
Net income attributable to Stewart
Net Income (Loss) Available to Common Stockholders, Basic
Denominator (000):
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Basic average shares outstanding
Average number of dilutive shares relating to grants of restricted shares and units
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Basic and diluted average shares outstanding
Weighted Average Number of Shares Outstanding, Basic and Diluted
Basic earnings per share attribute to Stewart (in usd per share)
Diluted earnings per share attribute to Stewart (in usd per share)
Fair Value Disclosures [Abstract]
Financial instruments measured at fair value on recurring basis
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
Geographical [Axis]
Geographical [Axis]
Geographical [Domain]
Geographical [Domain]
United States
UNITED STATES
International
Non-US [Member]
Cover page.
Document Type
Document Type
Document Quarterly Report
Document Quarterly Report
Document Period End Date
Document Period End Date
Document Transition Report
Document Transition Report
Entity File Number
Entity File Number
Entity Registrant Name
Entity Registrant Name
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Entity Tax Identification Number
Entity Tax Identification Number
Entity Address, Address Line One
Entity Address, Address Line One
Entity Address, Address Line Two
Entity Address, Address Line Two
Entity Address, City or Town
Entity Address, City or Town
Entity Address, State or Province
Entity Address, State or Province
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
City Area Code
City Area Code
Local Phone Number
Local Phone Number
Title of 12(b) Security
Title of 12(b) Security
Trading Symbol
Trading Symbol
Security Exchange Name
Security Exchange Name
Entity Current Reporting Status
Entity Current Reporting Status
Entity Interactive Data Current
Entity Interactive Data Current
Entity Filer Category
Entity Filer Category
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Small Business
Entity Small Business
Entity Shell Company
Entity Shell Company
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Entity Central Index Key
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Amendment Flag
Amendment Flag
Common stock, par value (in usd per share)
Common Stock, Par or Stated Value Per Share
Treasury stock, common shares (in shares)
Treasury Stock, Shares
Common stock, shares outstanding (in shares)
Common Stock, Shares, Outstanding
Summary of estimated title losses
Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]
Fair Value, Recurring and Nonrecurring [Table]
Fair Value, Recurring and Nonrecurring [Table]
Municipal
Corporate
Foreign
U.S. Treasury Bonds
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Level 1
Fair Value, Inputs, Level 1 [Member]
Level 2
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities
Investments in debt and equity securities
Amortized costs
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract]
In one year or less
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost
After one year through five years
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost
After five years through ten years
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost
After ten years
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost
Amortized costs, total
Fair values
Debt Securities, Available-for-sale [Abstract]
In one year or less
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value
After one year through five years
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value
After five years through ten years
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value
After ten years
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value
Fair values, total
Schedule of changes in the balances of each component of other comprehensive income (loss)
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
Gross realized investment and other gains and losses
Schedule of Realized Gain (Loss) [Table Text Block]
Investments in equity securities still held
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block]
Proceeds from sale of investments in securities
Debt Securities, Available-for-sale [Table Text Block]
Investments in debt securities
Investments in equity securities
Gross unrealized gains and losses
Unrealized Gain (Loss) on Investments [Table Text Block]
Debt securities according to contractual terms
Investments Classified by Contractual Maturity Date [Table Text Block]
Gross unrealized losses on investments and fair values of related securities
Schedule of Temporary Impairment Losses, Investments [Table Text Block]
Fair value measurements
Fair Value Disclosures [Text Block]
Assets:
Operating lease assets, net of accumulated amortization
Finance lease assets, net of accumulated depreciation
Finance Lease, Right-of-Use Asset
Total lease assets
Lease, Right-Of-Use Asset
Lease, Right-Of-Use Asset
Liabilities:
Finance lease liabilities
Total lease liabilities
Lease, Liability
Lease, Liability