| Summary of Significant Accounting Policies (Policies) | 12 Months Ended |
| Dec. 31, 2024 |
| Accounting Policies [Abstract] | |
| Earnings Per Share, Policy [Policy Text Block] | There were approximately 7,000, 63,000 and 120,000 anti-dilutive restricted shares as of December 31, 2024, 2023 and 2022, respectively, which were excluded from weighted average shares outstanding. The following table sets forth the computation of basic and diluted earnings (loss) per share (in thousands, except per share and share amounts): Years ended December 31, 2024 2023 2022 Income (loss) attributable to Westwood Holdings Group, Inc. $ 2,215 $ 9,520 $ (4,628) Weighted average shares outstanding – basic 8,163,465 7,964,423 7,844,363 Dilutive potential shares from unvested restricted shares 352,314 147,716 — Weighted average shares outstanding – diluted 8,515,779 8,112,139 7,844,363 Earnings (loss) per share: Basic $ 0.27 $ 1.20 $ (0.59) Diluted $ 0.26 $ 1.17 $ (0.59) |
| Principles of consolidation | Principles of Consolidation The accompanying Consolidated Financial Statements include the accounts of Westwood and its subsidiaries. All intercompany accounts and transactions have been eliminated upon consolidation. The Consolidated Balance Sheets have been reclassified to unclassified balance sheets to better reflect the nature of the Company’s operations. Prior year amounts have been reclassified for consistency with the current year presentation. We assess each legal entity that we manage to determine whether consolidation is appropriate at the onset of the relationship. We first determine whether the entity is a variable interest entity (“VIE”), or a voting interest entity (“VOE”), under GAAP and whether we have a controlling financial interest in the entity. Assessing whether or not an entity is a VOE or VIE and if it requires consolidation involves judgment and analysis. Factors considered in this assessment include, but are not limited to, the legal organization of the entity, our equity ownership and contractual involvement with the entity and any related party or de facto agent implications of our involvement with the entity. We reconsider whether entities are a VIE or VOE whenever contractual arrangements change, the entity receives additional equity or returns equity to its investors or changes in facts and circumstances occur that change investors’ abilities to direct the activities of the entity. A VIE is an entity in which (i) the total equity investment at risk is not sufficient to enable the entity to finance its activities without subordinated financial support, (ii) the at-risk equity holders, as a group, lack the characteristics of a controlling financial interest or (iii) the entity is structured with disproportionate voting rights, and substantially all of the activities are conducted on behalf of an investor with disproportionately few voting rights. That is, the at-risk equity holders do not have the obligation to absorb significant losses, the right to receive residual returns and the right to direct the activities of the entity that most significantly impact the entity’s economic performance. An enterprise must consolidate all VIEs of which it is the primary beneficiary. We determine if a sponsored investment meets the definition of a VIE by considering whether the fund’s equity investment at risk is sufficient to finance its activities without additional subordinated financial support and whether the fund’s at-risk equity holders absorb any losses, have the right to receive residual returns and have the right to direct the activities of the entity most responsible for the entity’s economic performance. The primary beneficiary of a VIE is defined as the party that, considering the involvement of related parties and de facto agents, has (i) the power to direct the activities of the VIE that most significantly affect its economic performance and (ii) the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the VIE. This evaluation is updated on a continuing basis. A VOE is an entity that is outside the scope of the guidance for VIEs. Consolidation of a VOE is required when a reporting entity owns a controlling financial interest in a VOE. Ownership of a majority of the voting interests is the usual condition for a controlling financial interest. We evaluated (i) our relationship as sponsor of the Common Trust Funds ("CTFs") and managing member of the private equity funds Westwood Hospitality, Westwood Technology Opportunities Fund I, LP, Westwood Energy Secondaries I and Westwood Energy Secondaries II (collectively the “Private Funds”), (ii) our advisory relationships with the Westwood Funds® and (iii) our investments in InvestCloud Inc. ("InvestCloud"), Vista, Zarvona Energy Fund GP, Zarvona Energy Fund II-A, Westwood Engineered Beta ("WEBs") and the TXSE Group Inc. ("TXSE") as discussed in Note 6 “Investments” to determine whether each of these entities is a variable interest entity ("VIE") or voting ownership entity (“VOE”). Based on our analyses, we determined that the CTFs, Private Funds, Zarvona Energy Fund II-A and WEBs were VIEs, as the at-risk equity holders do not have the ability to direct the activities that most significantly impact the entities' economic performance, and, while the Company and its representatives have a majority control of the entities' respective boards of directors and can influence the respective entities' management and affairs, the Company is not exposed to a majority of the economics of those entities and does not qualify as primary beneficiaries for those entities. We have not consolidated our investments in those entities for the periods ending December 31, 2024 and 2023. Based on our analyses, we determined the Westwood Funds®, InvestCloud, Vista, Zarvona Energy Fund GP and TXSE (i) have sufficient equity at risk to finance the entities' activities independently, (ii) have the obligation to absorb losses, the right to receive residual returns and the right to direct the activities of the entities that most significantly impact the entities' economic performance and (iii) are not structured with disproportionate voting rights and are VOEs. As we do not own controlling financial interests in those entities, we have not consolidated our investments in those entities for the periods ending December 31, 2024 and 2023. |
| Use of Estimates | Use of Estimates The preparation of Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses in the financial statements. Such estimates include, but are not limited to, the Company's estimates in connection with values of long lived assets, provision for income tax, goodwill, intangible assets, contingent consideration and accrued expenses. Actual results could differ significantly from those estimates. |
| Cash and Cash Equivalents | Cash and Cash Equivalents Cash and cash equivalents consist of money market accounts and other short-term, highly liquid investments with maturities of three months or less, other than pooled investment vehicles that are considered investments. We maintain some cash and cash equivalents balances with financial institutions that are in excess of Federal Deposit Insurance Corporation insurance limits. The Company has not experienced losses on uninsured cash accounts, which are held at large, well-capitalized financial institutions. |
| Accounts Receivable | Accounts Receivable Accounts receivable represents balances arising from services provided to customers and are recorded on an accrual basis, net of any allowance for credit losses. Accounts receivable are written off when they are determined to be uncollectible. Any allowance for credit losses is estimated based on the Company’s historical amounts written off, existing conditions in the industry, and the financial stability of the customer. The majority of our accounts receivable balances consist of advisory and trust fees receivable from customers that we believe are, and have experienced to be, fully collectible. Accordingly, our Consolidated Financial Statements include neither an allowance for credit losses, nor provision for credit losses. |
| Investments | Investments Investments that are measured at fair market value are classified as "Investments at fair value" and are carried at quoted market values on the accompanying Consolidated Balance Sheets. Net unrealized holding gains or losses on investments classified as trading securities are reflected as a component of other revenues. We measure realized gains and losses on investments using the specific identification method. |
| Fair Value of Financial Instruments | Fair Value of Financial Instruments ASC 820, Fair Value Measurements ("ASC 820") defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. We determined the estimated fair values of our financial instruments using available information. The fair value amounts discussed in Notes 6 “Investments” and 7 “Fair Value Measurements” are not necessarily indicative of either the amounts realizable upon disposition of these instruments or of our intent or ability to dispose of these assets. The estimated fair value of cash and cash equivalents, included in Level 1 of the fair value hierarchy as discussed in Note 7 "Fair Value Measurements", approximates their carrying value due to their short-term maturities. The carrying amount of investments designated as “trading” securities, primarily U.S. Government securities, money market funds, equity funds, equities and exchange-traded bond funds, equals fair value based on prices quoted in active markets and, with respect to funds, the reported net asset value (“NAV”) of the shares held. Market values of our money market holdings generally do not fluctuate. Our investments in InvestCloud, Vista, WEBs and the TXSE Group Inc. ("TXSE") are measured at cost minus impairment, if any, adjusted for any observable price changes in orderly transactions for these investments. Our investments in Westwood Hospitality and Westwood Energy Secondaries are measured at fair value using NAV as a practical expedient. |
| Goodwill and Other Intangible Assets | Goodwill and Other Intangible Assets Goodwill represents the excess of the cost of acquired assets over the fair value of the underlying liabilities assumed at the date of acquisition. Goodwill is tested at least annually for impairment. We test more frequently if indicators are present or changes in circumstances suggest that impairment may exist. These indicators include declines in revenues, earnings or cash flows, or the development of a material adverse change in the business climate. We assess goodwill for impairment at the reporting unit level, which is defined as an operating segment or one level below an operating segment, which is referred to as a component. We have identified two reporting units, which are consistent with our reporting segments: Advisory and Trust. The Company is not required to calculate the fair value of a reporting unit unless we determine that it is more likely than not that its fair value is less than the carrying amount. We assess goodwill for impairment using either a qualitative or quantitative assessment. The qualitative assessment includes consideration of the current trends in the industry in which we operate, macroeconomic conditions and recent financial performance of our reporting units. The quantitative analysis requires a comparison of each reporting unit’s carrying value to the fair value of the respective unit. An impairment charge would be recognized 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. The fair value of each reporting unit is estimated using a market multiple approach and an income approach. We completed our most recent annual goodwill impairment assessment during the third quarter of 2024, and determined that no goodwill impairment related to the Advisory and Trust segments was required. There was no goodwill impairment in either segment during the years ended December 31, 2024, 2023 or 2022. |
| Property and Equipment | Property and Equipment Property and equipment are stated at cost less accumulated depreciation. Depreciation of furniture and equipment is provided over the estimated useful lives of the assets (from 3 to 7 years), and depreciation on leasehold improvements is provided over the lesser of the estimated useful life or lease term using the straight-line method. We capitalize leasehold improvements, furniture and fixtures, computer hardware and most office equipment purchases. We include depreciation in the “General and administrative” line on our Consolidated Statements of Operations. |
| Revenue Recognition, Policy [Policy Text Block] | Revenue Recognition Revenues are recognized when the performance obligation (the investment management and advisory or trust services provided to the client) defined by the investment advisory or sub-advisory agreement is satisfied. For each performance obligation, we determine at contract inception whether the revenue satisfies over time or at a point in time. We derive our revenues from investment advisory fees, trust fees and other sources of revenues such as gains and losses from our seed money investments into net investment strategies. The "Other, net” revenues on our Consolidated Statements of Operations are the unrealized gains and losses on our seed money investments, and our seed money investments are included in "Investments at fair value" on our Consolidated Balance Sheets. Our seed money investments were $3.0 million at December 31, 2024 and 2023, respectively. Advisory and Trust fees are calculated based on a percentage of AUM and AUA, and the performance obligation is realized over the then-current calendar quarter. Once clients receive our investment advisory services we have an enforceable right to payment. Incremental costs to obtain a contract are eligible to be capitalized if the costs are expected to be recovered over the service period. We incur certain incremental costs in obtaining new business and continually evaluate whether costs should be capitalized and amortized over the expected period of benefit of the asset. Certain costs used to fulfill a contract such as the distribution services utilized to sell our Westwood Funds® are expensed as incurred. We recognize the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that the entity otherwise would have recognized is one year or less. |
| Stock Based Compensation | Stock-Based Compensation We have issued restricted stock to certain U.S. employees and members of our Board of Directors (the "Board") in accordance with our Tenth Amended and Restated Westwood Holdings Group, Inc. Stock Incentive Plan (the “Plan”). Stock-based compensation expense reflects the fair value of stock-based awards measured at grant date and is recognized over the relevant service period. We expense the fair value of stock-based compensation awards granted to our employees and directors in our Consolidated Financial Statements on a straight-line basis over the period that services are required to be provided in exchange for the award (“requisite service period”), which is typically the period over which the award vests. Stock-based compensation is recognized only for awards that vest. We measure the fair value of compensation cost related to restricted stock awards based on the closing market price of our common stock on the grant date. For performance-based share awards, we assess actual performance versus the predetermined performance goals and record compensation expense once we conclude it is probable that we will meet the performance goals required to vest the applicable performance-based awards. We account for restricted stock forfeitures as they occur. |
| Income Taxes | Income Taxes We file a U. S. federal income tax return as a consolidated group for Westwood and its U.S.-based subsidiaries. Deferred income tax assets and liabilities are determined based on temporary differences between the financial statements and income tax bases of assets and liabilities as measured at enacted income tax rates. Deferred income tax expense is generally the result of changes in deferred tax assets and liabilities. Deferred taxes relate primarily to incentive compensation and stock-based compensation expense. We record net deferred tax assets to the extent we believe such assets will more likely than not be realized. In making such a determination, we consider all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. In the event we were to determine that we would not be able to realize our deferred income tax assets in the future, we would record a valuation allowance. No such valuation allowance has been recorded in our Consolidated Financial Statements. We account for uncertain tax positions by recognizing the impact of a tax position in our Consolidated Financial Statements when we believe it is more likely than not that the tax position would not be sustained upon examination by the appropriate tax authority based on the merits of the position. We include penalties and interest on income-based taxes, if any, in the “General and administrative” line on our Consolidated Statements of Operations. See Note 9 “Income Taxes.” Lease s We determine if an arrangement contains a lease at inception, and leases are classified as either operating or finance leases at the lease commencement date. An arrangement contains a lease if it implicitly or explicitly identifies an asset to be used and conveys the right to control the use of the identified asset in exchange for consideration. Right-of-use ("ROU") assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and lease liabilities are recognized upon commencement of the lease based on the present value of the lease payments over the lease term. As most of our leases do not provide an implicit interest rate, we generally use our estimated incremental borrowing rate at commencement date to determine the present value of lease payments. When readily determinable, we use the rate implicit in the lease. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Lease expense for operating leases and short-term leases is recognized on a straight-line basis over the lease term. Expenses associated with operating leases are recorded in “General and administrative” expenses on our Consolidated Statements of Operations. Short-term leases with a term of 12 months or less are not capitalized. Business Combinations In allocating the purchase price of a business combination, the Company records all assets acquired and liabilities assumed at fair value, with the excess of the purchase price over the aggregate fair values recorded as goodwill. The purchase price of an acquisition is allocated to the underlying assets acquired and liabilities assumed based upon their estimated fair values as of the date of acquisition. To the extent the purchase price exceeds the fair value of the net identifiable tangible and intangible assets acquired and liabilities assumed, such excess is allocated to goodwill. The Company determines the estimated fair values after review and consideration of relevant information, including discounted cash flows, quoted market prices and estimates made by management. The fair value assigned to identifiable intangible assets acquired is based on estimates and assumptions made by management at the time of the acquisition. The Company adjusts the preliminary purchase price allocation, as necessary, during the measurement period of up to one year after the acquisition closing date as it obtains more information as to facts and circumstances existing as of the acquisition date. Acquisition-related costs are recognized separately from the acquisition and are expensed as incurred. The acquired client relationships, trade names and non-compete agreements are subject to fair value measurements based primarily on significant inputs not observable in the market and thus represent level 3 measurements. The valuation of an acquired client relationship utilizes an income approach, which provides an estimate of the fair value of an asset based on discounted cash flows and management estimates, including the estimated growth associated with existing clients, market growth and client attrition. The valuation of acquired trade names uses a relief from royalty method in which the fair value of the intangible asset is estimated to be the present value of royalties saved because the Company owns the intangible asset. Revenue projections and estimated useful lives are used in estimating the fair value of the trade names. The non-compete agreements are calculated using the differential cash flow method (with-or-without method), which utilizes the probability of certain employees competing with the Company and revenue projections to calculate the valuation of non-competition agreements. When an acquisition includes future contingent consideration on achieving certain milestones, the Company estimates the earn-out fair value using Monte Carlo simulation models. The Monte Carlo simulations considered assumptions including revenue volatility, risk free rates, discount rates and payment discount rates. The projected contingent payment is discounted back to the current period using a discounted cash flow model. Increases or decreases in projected revenues, probabilities of payment, discount rates or projected payment dates may result in higher or lower fair value measurements. Fluctuations in any of the inputs may result in a significantly lower or higher fair value measurement. A liability is recorded for the estimated fair value of the contingent consideration on the acquisition date, and the fair value of the contingent consideration is remeasured at each subsequent reporting period with any change in fair value recognized as income or expense within the Consolidated Statements of Operations. Contingent consideration payments, to the extent they relate to the estimated contingent consideration as of the date of acquisition, are classified within financing activities in the Consolidated Statements of Cash Flows. Contingent consideration payments in excess of the acquisition date contingent consideration liability are classified within operating activities. Equity Method Investments |
| Recent Accounting Pronouncements | Recent Accounting Pronouncements Segment Reporting In November 2023, the Financial Accounting Standards Board ("FASB") issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures , which requires an entity to disclose significant segment expenses and other segment items on an annual and interim basis, and provide in interim periods all disclosures about a reportable segment’s profit or loss and assets that are currently required annually. Additionally, it requires an entity to disclose the title and position of the Chief Operating Decision Maker. This ASU does not change how an entity identifies its operating segments, aggregates them, or applies the quantitative thresholds to determine its reportable segments. We adopted this standard for the fiscal year 2024. See Note 5 "Segment Reporting" for our updated presentation. Income Taxes |
| Equity Method Investments | Equity Method Investments Investments in entities where we have the ability to exercise significant influence, but do not control, are accounted for under the equity method of accounting and are included in "Equity method investments" on our Consolidated Balance Sheets. Significant influence typically exists if we have a 20% to 50% ownership interest in the investee. We evaluate our equity method investments for impairment whenever events or changes in circumstances indicate that the carrying amounts of such investments may be impaired. If a decline in the value of an equity method investment is determined to be other than temporary, a loss is recorded in earnings in the current period. The Company’s proportionate share of the net income or loss of equity method investments is included in "Other income" on the Consolidated Statements of Operations, and any dividends received reduce the carrying value of the investment. |
