Basis Of Presentation and Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation – The accompanying Consolidated Financial Statements include the accounts and operations of Investors Title Company and its subsidiaries, and have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”). Earnings attributable to noncontrolling interests in majority-owned insurance agencies are recorded in the Consolidated Statements of Income. Noncontrolling interests representing the portion of equity not related to the Company's ownership interests are recorded in separate sections of the Consolidated Balance Sheets. All intercompany balances and transactions have been eliminated in consolidation.
Reclassifications	Immaterial Classification Corrections – In previous periods, certain commission revenue was improperly classified as net premiums written. The issue was identified in 2017 and, accordingly, the Consolidated Statements of Income have been corrected. The correction resulted in a decrease to previously reported net premiums written and an increase to other revenues of $1,526,230 and $566,213 for 2016 and 2015, respectively. The immaterial classification correction had no impact to the Company’s financial position or results of operations as previously reported.
Cash and Cash Equivalents	Cash and Cash Equivalents For the purpose of presentation in the Company’s Consolidated Statements of Cash Flows, cash equivalents are highly liquid instruments with remaining original maturities of three months or less. The carrying amount of cash and cash equivalents is a reasonable estimate of fair value due to the short-term maturity at purchase of these instruments.
Investments in Securities	Investments in Securities Securities for which the Company has the intent and ability to hold to maturity are classified as held-to-maturity and reported at cost, adjusted for amortization of premiums or accretion of discounts, and other-than-temporary declines in fair value. Securities held principally for resale in the near term are classified as trading securities and recorded at fair values. Realized and unrealized gains and losses on trading securities are included in other income. Securities not classified as either trading or held-to-maturity are classified as available-for-sale and reported at fair value with unrealized gains and losses, net of tax and adjusted for other-than-temporary declines in fair value, reported as accumulated other comprehensive income. As of December 31, 2017 and 2016, all investments in securities are classified as available-for-sale. Securities are regularly reviewed for differences between the cost and estimated fair value of each security for factors that may indicate that a decline in fair value is other-than-temporary. Some factors considered in evaluating whether or not a decline in fair value is other-than-temporary include the duration and extent to which the fair value has been less than cost and the Company’s ability and intent to retain the investment for a period of time sufficient to allow for a recovery in value. Such reviews are inherently uncertain and the value of the investment may not fully recover or may decline in future periods resulting in a realized loss. Fair values of the majority of investments are based on quoted market prices. Realized gains and losses are determined on the specific identification method. Refer to Note 3 for further information regarding investments in securities and fair value.
Short-term Investments	Short-term Investments Short-term investments are comprised of money market accounts which are invested in short-term funds, commercial paper, certificates of deposit, and other investments expected to have maturities or redemptions greater than three months and less than twelve months. The Company monitors any events or changes in circumstances that may have a significant adverse effect on the fair value of these investments.
Other Investments	Other Investments Other investments consist primarily of investments in title insurance agencies structured as limited liability companies (“LLCs”), which are accounted for under the equity or cost methods of accounting. The aggregate cost of the Company’s cost method investments totaled $5,438,745 and $4,744,402 at December 31, 2017 and 2016, respectively. The Company monitors any events or changes in circumstances that may have had a significant adverse effect on the fair value of these investments and makes any necessary adjustments.
Property Acquired in Settlement of Claims	Property Acquired in Settlement of Claims Property acquired in settlement of claims is held for sale and valued at the lower of cost or market. Adjustments to reported estimated realizable values and realized gains or losses on dispositions are recorded as increases or decreases in claim costs. Properties acquired in settlement of claims are included in prepaid expenses and other assets in the Consolidated Balance Sheets.
Property and Equipment	Property and Equipment Property and equipment are recorded at cost and are depreciated principally under the straight-line method over the estimated useful lives (3 to 25 years) of the respective assets. Maintenance and repairs are charged to operating expenses and improvements are capitalized.
Reserves for Claims	Reserve for Claims The total reserve for all reported and unreported losses the Company incurred through December 31, 2017 is represented by the reserve for claims. The Company’s reserve for unpaid losses and loss adjustment expenses is established using estimated amounts required to settle claims for which notice has been received (reported) and the amount estimated to be required to satisfy incurred claims of policyholders which may be reported in the future. Despite the variability of such estimates, management believes that the reserve is adequate to cover claim losses resulting from pending and future claims for policies issued through December 31, 2017. The Company continually reviews and adjusts its reserve estimates as necessary to reflect its loss experience and any new information that becomes available. Adjustments resulting from such reviews may be significant. Claims and losses paid are charged to the reserve for claims. Although claims losses are typically paid in cash, occasionally claims are settled by purchasing the interest of the insured or the claimant in the real property. When this event occurs, the acquiring company carries assets at the lower of cost or estimated realizable value, net of any indebtedness on the property.
Income Taxes	Income Taxes The Company makes certain estimates and judgments in determining income tax expense (benefit) for financial statement purposes. These estimates and judgments occur in the calculation of certain tax assets and liabilities which arise from differences in the timing of recognition of revenue and expense for tax and financial statement purposes. The Company provides for deferred income taxes (benefits) for the tax consequences in future years of temporary differences between the financial statements’ carrying values and the tax bases of assets and liabilities using currently enacted tax rates. The Company establishes a valuation allowance if it believes that it is more likely than not that some or all of its deferred tax assets will not be realized. Refer to Note 8 for further information regarding income taxes.
Premiums Written and Commissions to Agents	Premiums Written and Commissions to Agents Generally, title insurance premiums are recognized at the time of settlement of the related real estate transaction, as the earnings process is then considered complete, irrespective of the timing of issuance of a title insurance policy or commitment. Expenses typically associated with premiums, including agent commissions, premium taxes, and provision for future claims are recognized concurrent with recognition of related premium revenue.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts Company management continually evaluates the collectability of receivables and provides an allowance for doubtful accounts equal to estimated losses expected to be incurred in the collection of premiums and fees receivable. Changes to the allowance for doubtful accounts are reflected within net premiums written in the Consolidated Statements of Income. Amounts are charged off in the period they are deemed to be uncollectible. Quarterly, the Company evaluates the collectability of receivables. Premiums not collected within 7 months are fully reserved. Write-offs of receivables have not been material to the Company.
Exchange Services Revenue	Exchange Services Revenue Fees are recognized at the signing of a binding agreement and investment earnings are recognized as they are earned. Exchange services revenue is included in other revenues in the Consolidated Statements of Income.
Fair Values of Financial Instruments	Fair Values of Financial Instruments The carrying amounts reported in the Consolidated Balance Sheets for cash and cash equivalents, short-term investments, premium and fees receivable, accrued interest and dividends, accounts payable, commissions payable, reinsurance payable and current income taxes recoverable/payable approximate fair value due to the short-term nature of these assets and liabilities. Estimated fair values for the majority of investment securities are based on quoted market prices. Refer to Note 3 for further information regarding investments in securities and fair value.
Comprehensive Income	Comprehensive Income The Company’s accumulated other comprehensive income is comprised of unrealized holding gains/losses on available-for-sale securities, net of tax, and unrecognized prior service cost and unrealized gains/losses associated with postretirement benefit liabilities, net of tax. Accumulated other comprehensive income as of December 31, 2017 consists of $16,002,382 of unrealized holding gains on available-for-sale securities and $57,556 of unrecognized actuarial losses associated with postretirement benefit liabilities. Accumulated other comprehensive income as of December 31, 2016 consists of $11,870,647 of unrealized holding gains on available-for-sale securities and $109,200 of unrecognized actuarial losses associated with postretirement benefit liabilities. Accumulated other comprehensive income as of December 31, 2015 consists of $11,597,741 of unrealized holding gains on available-for-sale securities and $114,726 of unrecognized prior service cost and unrecognized actuarial losses associated with postretirement benefit liabilities.
Share-Based Compensation	Share-Based Compensation The Company accounts for share-based compensation in accordance with the fair value based principles required by the Financial Accounting Standards Board (“FASB”). Share-based compensation cost is generally measured at the grant date, based on the estimated fair value of the award, and is recognized as an expense over the employee’s requisite service period. As the share-based compensation expense recognized in the Consolidated Statements of Income is based on awards ultimately expected to vest, it has been reduced for estimated forfeitures. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The excess tax benefit related to stock appreciation rights included in income taxes payable was $142,280, $32,293 and $26,875 in 2017, 2016 and 2015, respectively.
Goodwill and Other Intangible Assets	Goodwill Goodwill represents the excess of cost over fair value of identifiable net assets acquired and assumed in a business combination. The fair value of the Company’s goodwill is principally based on values obtained from a third party valuation service. Goodwill is reviewed for impairment at least annually or when events or changes in circumstances indicate the carrying value may not be recoverable. Other Intangible Assets The Company’s other intangible assets consist of non-compete agreements, referral relationships and a tradename resulting from agency acquisitions; all of which are recorded at the acquisition date fair value. The fair value of the Company’s other intangible assets is principally based on values obtained from a third party valuation service. These assets are amortized on a straight-line basis over their useful lives, which range from 1 to 30 years; noting that the amortization of certain non-compete contracts will start at a future date when the related employment agreements are terminated. Other intangible assets are reviewed for impairment at least annually or when events or changes in circumstances indicate the carrying value may not be recoverable.
Title Plant	Title Plants Title plants represent a historical record of matters affecting title to parcels of land in a particular geographic area. Title plants are recorded at the cost incurred to construct or obtain and organize historical title information to the point it can be used to perform title searches. Costs incurred to maintain, update and operate title plants are expensed as incurred. Title plants are not amortized as they are considered to have an indefinite life with no diminishment of value if properly maintained; but are subject to impairment evaluation, which the Company performs on at least an annual basis.
Subsequent Events	Subsequent Events The Company has evaluated and concluded that there were no material subsequent events requiring adjustment or disclosure to its Consolidated Financial Statements.
Recently Issued Accounting Standards	Recently Issued Accounting Standards In February 2018, the FASB issued Accounting Standards Update ("ASU") 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. ASU 2018-02 is intended to help organizations reclassify certain stranded income tax effects in accumulated other comprehensive income resulting from the Tax Cuts and Jobs Act (“TCJA”). Under the ASU, entities will have the option to reclassify tax effects within other comprehensive income to retained earnings in each period in which the effect of the change in the federal corporate tax rate under the TCJA is recorded. The update is effective for annual periods beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted upon issuance of the standard, and the Company expects to adopt the standard during 2018. The Company is currently evaluating the impact that the recently issued accounting standard will have on the Company's financial position and results of operations, but does not expect it to have a material impact. In March 2017, the FASB issued ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. ASU 2017-08 is intended to enhance the accounting for the amortization of premiums for purchased callable debt securities. Specifically, the ASU shortens the amortization period for certain investments in callable debt securities purchased at a premium by requiring that the premium be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The update is effective for annual periods beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the impact that the recently issued accounting standard will have on the Company's financial position and results of operations, but does not expect it to have a material impact. In March 2017, the FASB issued ASU 2017-07, Compensation - Retirement Benefits (Topic 715). This update requires entities to (1) disaggregate the current service cost component from the other components of net benefit cost (the "other components") and present it with other current compensation costs for related employees in the income statement and (2) present the other components elsewhere in the income statement and outside of income from operations if that subtotal is presented. In addition, the ASU requires entities to disclose the income statement lines that contain the other components if they are not presented on appropriately described separate lines. The update is effective for annual periods beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted as of the beginning of an annual period for which financial statements (interim or annual) have not been issued or made available for issuance. None of these amendments will have a material impact on the Company’s financial position or results of operations. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350). This update removes the requirement to compare the implied fair value of goodwill with its carrying amount as part of step 2 of the goodwill impairment test. As a result, under the ASU, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. In addition, the ASU clarifies that an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The update is effective for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. None of these amendments is expected to have a material impact on the Company's financial position or results of operations. In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326). ASU 2016-13 is intended to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The update broadens the information that an entity must consider in developing its expected credit loss estimates, and is meant to better reflect an entity’s current estimate of all expected credit losses. In addition, this update amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The update is effective for annual periods beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted as of fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is currently evaluating the impact that the recently issued accounting standard will have on the Company's financial position and results of operations, but does not expect it to have a material impact. Currently, the Company's potential credit losses under this accounting standard relate to available-for-sale securities. The Company does not believe that the risk of credit losses, based on current available-for-sale security holdings, is material to the Company's financial statements as a whole. Please refer to Note 3 for further information about the Company's investments. In March 2016, the FASB issued ASU 2016-09, Compensation – Stock Compensation (Topic 718). ASU 2016-09 updated guidance to simplify several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The update is effective for annual periods beginning after December 15, 2016, and interim periods within that reporting period. The Company adopted this update on January 1, 2017 with no material impact to the Company's financial position or results of operations. All excess tax benefits and tax deficiencies are now recognized as income tax expense or benefit in the Consolidated Statements of Income. In addition, a reclassification was made on the Consolidated Statements of Cash Flows, as companies are now required to present excess tax benefits as an operating activity on the Consolidated Statements of Cash Flows rather than as a financing activity. The Company began recording all excess tax benefits and tax deficiencies as an income tax expense or benefit on a prospective basis. The amendments relating to the presentation of excess tax benefits within the Consolidated Statements of Cash Flows were adopted by the Company retrospectively. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). ASU 2016-02 updated guidance to improve financial reporting for leasing transactions. The core principle of the guidance is that lessees will be required to recognize assets and liabilities on the balance sheet for all leases with terms of more than twelve months. A lessee would recognize a liability to make lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term. The accounting applied by a lessor is largely unchanged from current GAAP, with some targeted improvements. Disclosures will be required by lessees and lessors to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. In transition, both lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The update is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption was permitted for all entities upon issuance. The Company is currently evaluating the impact that the recently issued accounting standard will have on the Company's financial position and results of operations, but does not expect it to have a material impact. As of December 31, 2017, future minimum lease payments with terms of more than twelve months were approximately $3.6 million. In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 updated guidance to enhance the reporting model for financial instruments. Among the main principles of the guidance applicable to the Company are provisions to: require equity investments, except those accounted for under the equity method of accounting or those that result in consolidation of the investee, to be measured at fair value with changes in fair value recognized in net income; simplify the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, noting that when a qualitative assessment indicates that impairment exists that an entity is required to measure the investment at fair value; eliminate the requirement to disclose methods and significant assumptions used to estimate the fair value for financial instruments measured at amortized cost; require entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; require separate presentation of financial assets and financial liabilities by measuring category and form of financial asset on the balance sheet or accompanying notes to the financial statements; and clarify that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity’s other deferred tax assets. The update is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted for the provision requiring entities to recognize the fair value change from instrument-specific credit risk in other comprehensive income for financial liabilities measured using the fair value option in Accounting Standards Codification ("ASC") 825, and can be early adopted for financial statements of annual or interim periods that have not yet been issued or made available for issuance. The Company will be required to apply the update by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption, with the amendments related to equity securities without readily determinable fair values being applied prospectively to equity investments that exist as of the date of adoption. While the Company expects the guidance to have an impact on the Company’s financial condition and results of operations once effective, the materiality of this impact will depend upon the level of volatility experienced within the Company’s equity portfolio. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). ASU 2014-09 updated guidance to improve the comparability of revenue recognition practices for entities that either enter into contracts with customers to transfer goods or services or enter into contracts for the transfer of nonfinancial assets, unless those contracts are within the scope of other standards such as insurance contracts or lease standards. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. For public entities, this update originally became effective for interim and annual reporting periods beginning after December 15, 2016. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date. ASU 2015-14 updated guidance to defer the effective date of the standard by one year. Based on the Company’s evaluation of ASU 2014-09, there will be no significant changes to revenue recognition practices upon adoption.
Use Of Estimates and Assumptions	Use of Estimates and Assumptions The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period and accompanying notes. Actual results could differ materially from those estimates and assumptions used. The more significant of these estimates and assumptions include the following: Claims – The Company’s reserve for claims is established using estimated amounts required to settle claims for which notice has been received (reported) and the amount estimated to be required to satisfy incurred claims of policyholders which may be reported in the future (incurred but not reported, or “IBNR”). A provision for estimated future claims payments is recorded at the time policy revenue is recorded as a percentage of premium income. By their nature, title claims can often be complex, vary greatly in dollar amounts, vary in number due to economic and market conditions such as an increase in mortgage foreclosures, and involve uncertainties as to ultimate exposure. In addition, some claims may require a number of years to settle and determine the final liability for indemnity and loss adjustment expense. The payment experience may extend for more than 20 years after the issuance of a policy. Events such as fraud, defalcation and multiple property defects can substantially and unexpectedly cause increases in estimates of losses. Due to the length of time over which claim payments are made and regularly occurring changes in underlying economic and market conditions, these estimates are subject to variability. Management considers factors such as the Company’s historical claims experience, case reserve estimates on reported claims, large claims, actuarial projections and other relevant factors in determining its loss provision rates and the aggregate recorded expected liability for claims. In establishing the reserve, actuarial projections are compared with recorded reserves to evaluate the adequacy of such recorded claims reserves and any necessary adjustments are then recorded in the current period’s income statement. As the most recent claims experience develops and new information becomes available, the loss reserve estimate related to prior periods will change to more accurately reflect updated and improved emerging data. The Company reflects any adjustments to the reserve in the results of operations in the period in which new information (principally claims experience) becomes available. The Company’s reserve for claims is established using estimated amounts required to settle claims for which notice has been received (reported) and the amount estimated to be required to satisfy incurred claims of policyholders which have been incurred but not reported (“IBNR”). Premiums written – Premium revenues from certain agency operations include accruals for transactions which have settled but have not been reported as of the balance sheet date. These accruals are based on estimates of the typical lag time between settlement of real estate transactions and the agent’s reporting of these transactions to the Company. Reporting lag times vary by market. In certain markets, the lag time may be very short, but in others, can be as high as 100 days. The Company reviews and adjusts lag time estimates periodically, using historical experience and other factors, and reflects any adjustments in the result of operations in the period in which new information becomes available. Impairments – Securities are regularly evaluated and reviewed for differences between the cost and estimated fair value of each security for factors that may indicate that a decline in estimated fair value is other-than-temporary. When, in the opinion of management, a decline in the estimated fair value of an investment is considered to be other-than-temporary, such investment is written down to its estimated fair value. Some factors considered in evaluating whether or not a decline in estimated fair value is other-than-temporary include the duration and extent to which the estimated fair value has been less than cost; the probability that the Company will be unable to collect all amounts due under the contractual terms of the security; with respect to equity securities, whether the Company’s ability and intent to retain the investment for a period of time is sufficient to allow for a recovery in value; with respect to fixed maturity securities, whether the Company has the intent to sell or will more likely than not be required to sell a particular security before recovery in value; and the financial condition and prospects of the issuer (including credit ratings). These factors are reviewed quarterly and any material degradation in the prospect for recovery will be considered in the other-than-temporary impairment analysis. Such reviews are inherently uncertain and the value of the investment may not fully recover or may decline in future periods resulting in a realized loss. The estimated fair values of the majority of the Company’s investments are based on quoted market prices from independent pricing services.