WisdomTree (WT) 10-K 1 Mar 17 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Feb. 17, 2017	Jun. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Trading Symbol	WETF
Entity Registrant Name	WisdomTree Investments, Inc.
Entity Central Index Key	880,631
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		136,622,560
Entity Public Float			$ 1,120,852,597

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 92,722	$ 210,070
Securities owned, at fair value	58,907
Securities held-to-maturity	3,994
Accounts receivable	17,668	27,576
Prepaid expenses	3,346	2,627
Other current assets	555	272
Total current assets	177,192	240,545
Fixed assets, net	11,748	11,974
Securities held-to-maturity	18,502	23,689
Deferred tax asset, net	9,826	14,071
Investment, carried at cost	20,000
Goodwill	1,799	1,676
Intangible asset	9,953
Other noncurrent assets	747	738
Total assets	249,767	292,693
Current liabilities:
Fund management and administration payable	13,584	12,971
Compensation and benefits payable	14,652	28,060
Income taxes payable	4,700	3,024
Acquisition payable	3,537
Securities sold, but not yet purchased, at fair value	1,248
Accounts payable and other liabilities	5,806	5,039
Total current liabilities	43,527	49,094
Acquisition payable		3,942
Deferred rent payable	4,896	5,155
Total liabilities	48,423	58,191
Commitments and Contingencies (See Note 8)
Stockholders' equity:
Preferred stock, par value $0.01; 2,000 shares authorized:
Common stock, par value $0.01; 250,000 shares authorized; issued and outstanding: 136,475 and 138,415 at December 31, 2016 and December 31, 2015, respectively	1,365	1,384
Additional paid-in capital	224,739	257,960
Accumulated other comprehensive loss	(44)	(126)
Accumulated deficit	(24,716)	(24,716)
Total stockholders' equity	201,344	234,502
Total liabilities and stockholders' equity	$ 249,767	$ 292,693

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,000,000	2,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	136,475,000	138,415,000
Common stock, shares outstanding	136,475,000	138,415,000

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues:
Advisory fees	$ 218,465,000	$ 297,944,000	$ 182,816,000
Other income	981,000	998,000	946,000
Total revenues	219,446,000	298,942,000	183,762,000
Expenses:
Compensation and benefits	63,263,000	73,228,000	40,995,000
Fund management and administration	41,083,000	42,782,000	34,383,000
Marketing and advertising	15,643,000	13,371,000	11,514,000
Sales and business development	12,537,000	9,189,000	6,221,000
Professional and consulting fees	6,692,000	7,067,000	7,578,000
Occupancy, communications and equipment	5,211,000	4,299,000	3,578,000
Depreciation and amortization	1,305,000	1,006,000	821,000
Third party sharing arrangements	2,827,000	2,443,000	594,000
Goodwill impairment	1,676,000
Acquisition payment	6,738,000	2,185,000
Other	6,909,000	6,187,000	4,530,000
Total expenses	163,884,000	161,757,000	110,214,000
Income before taxes	55,562,000	137,185,000	73,548,000
Income tax expense	29,407,000	57,133,000	12,497,000
Net income	$ 26,155,000	$ 80,052,000	$ 61,051,000
Net income per share - basic	$ 0.19	$ 0.58	$ 0.46
Net income per share - diluted	$ 0.19	$ 0.58	$ 0.44
Weighted-average common shares - basic	134,401	137,242	131,770
Weighted-average common shares - diluted	135,539	138,825	138,551
Cash dividends declared per common share	$ 0.32	$ 0.57	$ 0.08

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 26,155	$ 80,052	$ 61,051
Other comprehensive income/(loss)
Unrealized losses on available-for-sale securities, net of tax	(163)
Foreign currency translation adjustment	245	(73)	(53)
Other comprehensive income/(loss)	82	(73)	(53)
Comprehensive income	$ 26,237	$ 79,979	$ 60,998

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2013	$ 109,029	$ 1,322	$ 184,201		$ (76,494)
Balance, shares at Dec. 31, 2013		132,247,000
Restricted stock issued, net		$ 6	(6)
Restricted stock issued net, shares		613,000
Shares repurchased	(6,531)	$ (4)	(6,527)
Shares repurchased, shares		(416,000)
Exercise of stock options, net	$ 1,544	$ 26	1,518
Exercise of stock options net, shares	2,514,621	2,515,000
Stock-based compensation	$ 8,137		8,137
Tax benefit from stock option exercised and vested restricted shares	21,893		21,893
Other comprehensive income	(53)			$ (53)
Dividends	(10,785)				(10,785)
Net income	61,051				61,051
Balance at Dec. 31, 2014	184,285	$ 1,350	209,216	(53)	(26,228)
Balance, shares at Dec. 31, 2014		134,959,000
Restricted stock issued, net		$ 9	(9)
Restricted stock issued net, shares		861,000
Shares repurchased	(24,116)	$ (12)	(24,104)
Shares repurchased, shares		(1,190,000)
Exercise of stock options, net	$ 4,520	$ 37	4,483
Exercise of stock options net, shares	3,785,473	3,785,000
Stock-based compensation	$ 10,900		10,900
Tax benefit from stock option exercised and vested restricted shares	57,474		57,474
Other comprehensive income	(73)			(73)
Dividends	(78,540)				(78,540)
Net income	80,052				80,052
Balance at Dec. 31, 2015	$ 234,502	$ 1,384	257,960	(126)	(24,716)
Balance, shares at Dec. 31, 2015	138,415,000	138,415,000
Restricted stock issued, net		$ 16	(16)
Restricted stock issued net, shares		1,662,000
Shares repurchased	$ (39,379)	$ (37)	(39,342)
Shares repurchased, shares		(3,778,000)
Exercise of stock options, net	$ 195	$ 2	193
Exercise of stock options net, shares	176,350	176,000
Stock-based compensation	$ 14,892		14,892
Tax benefit from stock option exercised and vested restricted shares	8,557		8,557
Other comprehensive income	82			82
Dividends	(43,660)		(17,505)		(26,155)
Net income	26,155				26,155
Balance at Dec. 31, 2016	$ 201,344	$ 1,365	$ 224,739	$ (44)	$ (24,716)
Balance, shares at Dec. 31, 2016	136,475,000	136,475,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 26,155,000	$ 80,052,000	$ 61,051,000
Non-cash items included in net income:
Income tax expense	12,900,000	53,018,000	12,403,000
Depreciation and amortization	1,305,000	1,006,000	821,000
Stock-based compensation	14,892,000	10,900,000	8,137,000
Goodwill impairment	1,676,000
Deferred rent	(231,000)	(83,000)	1,572,000
Accretion to interest income and other	(47,000)	4,000	(72,000)
Changes in operating assets and liabilities:
Securities owned, at fair value	(1,556,000)
Accounts receivable	9,778,000	(9,321,000)	(369,000)
Prepaid expenses	(719,000)	(1,069,000)	(258,000)
Other assets	(307,000)	(795,000)	357,000
Acquisition payable	(384,000)	2,185,000
Fund management and administration payable	9,636,000	2,978,000	(445,000)
Compensation and benefits payable	(13,089,000)	13,286,000	(186,000)
Income taxes payable	1,687,000	2,974,000	10,000
Securities sold, but not yet purchased, at fair value	1,249,000
Accounts payable and other liabilities	(8,034,000)	(24,000)	(391,000)
Net cash provided by operating activities	54,911,000	155,111,000	82,630,000
Cash flows from investing activities:
Purchase of fixed assets	(1,070,000)	(2,616,000)	(4,894,000)
Purchase of securities held-to-maturity	(15,502,000)	(14,467,000)	(3,225,000)
Purchase of securities available-for-sale	(63,619,000)
Purchase of investment	(20,000,000)
Proceeds from held-to-maturity securities maturing or called prior to maturity	16,742,000	4,764,000	939,000
Proceeds from sales and maturities of securities available-for-sale	6,002,000
Acquisition less cash acquired	(11,818,000)		1,349,000
Net cash used in investing activities	(89,265,000)	(12,319,000)	(5,831,000)
Cash flows from financing activities:
Dividends paid	(43,660,000)	(78,540,000)	(10,785,000)
Shares repurchased	(39,379,000)	(24,116,000)	(6,531,000)
Proceeds from exercise of stock options	195,000	4,520,000	1,544,000
Net cash used in financing activities	(82,844,000)	(98,136,000)	(15,772,000)
(Decrease)/increase in cash flow due to changes in foreign exchange rate	(150,000)	130,000	(59,000)
Net (decrease)/increase in cash and cash equivalents	(117,348,000)	44,786,000	60,968,000
Cash and cash equivalents-beginning of year	210,070,000	165,284,000	104,316,000
Cash and cash equivalents-end of year	92,722,000	210,070,000	165,284,000
Supplemental disclosure of cash flow information:
Cash paid for taxes	$ 14,990,000	$ 1,262,000	$ 66,000

Organization and Description of

Organization and Description of Business	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Organization and Description of Business	1. Organization and Description of Business WisdomTree Investments, Inc., through its global subsidiaries (collectively, “WisdomTree” or the “Company”), is an exchange traded product (“ETP”) sponsor and asset manager headquartered in New York. WisdomTree offers ETPs covering equity, fixed income, currency, alternative and commodity asset classes. The Company has the following wholly-owned operating subsidiaries: • WisdomTree Asset Management, Inc. • Boost Management Limited • WisdomTree Europe Limited • WisdomTree Management Limited • WisdomTree Japan Inc. • WisdomTree Commodity Services, LLC • WisdomTree Asset Management Canada, Inc. The WisdomTree ETFs are issued in the U.S. by WTT. WTT, a non-consolidated open-end non-consolidated non-consolidated The Board of Trustees and Board of Directors of WTT, BI and WTI, respectively, are separate from the Board of Directors of the Company. The respective Trustees and Directors of WTT, BI and WTI, as applicable, are primarily responsible for overseeing the management and affairs of the WisdomTree ETFs, Boost ETPs and the WisdomTree UCITS ETFs for the benefit of the WisdomTree ETF, Boost ETP and the WisdomTree UCITS ETF shareholders, respectively, and have contracted with the Company to provide for general management and administration services. The Company, in turn, has contracted with third parties to provide the majority of these administration services. In addition, certain officers of the Company provide general management services for WTT, BI and WTI.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Significant Accounting Policies	2. Significant Accounting Policies Basis of Presentation These consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) and in the opinion of management reflect all adjustments, consisting of only normal recurring adjustments, necessary for a fair statement of financial condition, results of operations, and cash flows for the periods presented. The consolidated financial statements include the accounts of the Company’s wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Certain accounts in the prior years’ consolidated financial statements have been reclassified to conform to the current year’s consolidated financial statements presentation. These reclassifications had no effect on the previously reported operating results. Consolidation The Company consolidates entities in which it has a controlling financial interest. The Company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity (“VOE”) or a variable interest entity (“VIE”). The usual condition for a controlling financial interest in a VOE is ownership of a majority voting interest. If the Company has a majority voting interest in a VOE, the entity is consolidated. The Company has a controlling financial interest in a VIE when the Company has a variable interest that provides it with (i) the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. The Company had no variable interests in any VIEs at December 31, 2016 and 2015. Segment and Geographic Information The Company operates as an ETP sponsor and asset manager providing investment advisory services in the U.S., Europe, Canada and Japan. These activities are reported in the Company’s U.S. Business and International Business reportable segments. The U.S. Business segment includes the results of the Company’s U.S. operations and Japan sales office, which primarily engages in selling U.S. listed ETFs to Japanese institutions. The results of the Company’s European and Canadian operations are reported as the International Business segment. Revenues are primarily derived in the U.S. and the vast majority of the Company’s AUM is currently located in the U.S. Foreign Currency Translation Assets and liabilities of subsidiaries whose functional currency is not the U.S. dollar are translated based on the end of period exchange rates from local currency to U.S. dollars. Results of operations are translated at the average exchange rates in effect during the period. Use of Estimates The preparation of the Company’s consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the balance sheet dates and the reported amounts of revenues and expenses for the periods presented. Actual results could differ materially from those estimates. Revenue Recognition The Company earns investment advisory fees from its ETPs, as well as licensing fees from third parties. ETP advisory fees are based on a percentage of the ETPs’ average daily net assets and recognized over the period the related service is provided. Licensing fees are based on a percentage of the average monthly net assets and recognized over the period the related service is provided. Depreciation and Amortization Depreciation is provided for using the straight-line method over the estimated useful lives of the related assets as follows: Equipment 5 years Furniture and fixtures 15 years Leasehold improvements are amortized over the term of their respective leases or service lives of the improvements, whichever is shorter. Fixed assets are stated at cost less accumulated depreciation and amortization. Occupancy The Company accounts for its office lease facilities as operating leases, which may include free rent periods and escalation clauses. The Company expenses the lease payments associated with operating leases on a straight-line basis over the lease term. Marketing and Advertising Advertising costs, including media advertising and production costs, are expensed when incurred. Cash and Cash Equivalents The Company considers all highly liquid investments with an original maturity of 90 days or less at the time of purchase to be classified as cash equivalents. Accounts Receivable and Allowance for Doubtful Accounts Accounts receivable are customer and other obligations due under normal trade terms. An allowance for doubtful accounts is not provided since, in the opinion of management, all accounts receivable recorded are deemed collectible. Impairment of Long-Lived Assets The Company performs a review for the impairment of long-lived assets when events or changes in circumstances indicate that the estimated undiscounted future cash flows expected to be generated by the assets are less than their carrying amounts or when other events occur which may indicate that the carrying amount of an asset may not be recoverable. Earnings per Share Basic earnings per share (“EPS”) is computed by dividing net income available to common stockholders by the weighted-average number of common shares outstanding for the period. Net income available to common stockholders represents net income of the Company reduced by an allocation of earnings to participating securities. Unvested share-based payment awards that contain non-forfeitable two-class two-class Securities Owned and Securities Sold, but not yet Purchased (at fair value) Securities owned and securities sold, but not yet purchased are securities classified as either trading or available-for-sale Securities Held-to-Maturity The Company accounts for certain of its investments as held-to-maturity held-to-maturity more-likely-than-not Investment, Carried at Cost The Company accounts for equity securities that do not have a readily determinable fair value as cost method investments to the extent such investments are not subject to consolidation or the equity method. Income is recognized when dividends are received only to the extent they are distributed from net accumulated earnings of the investee. Otherwise, such distributions are considered returns of investment and are recorded as a reduction of the cost of the investment. Cost method investments held by the Company are assessed for impairment on a quarterly basis. Goodwill Goodwill is the excess of the fair value of the purchase price over the fair values of the identifiable net assets at the acquisition date. The Company tests its goodwill for impairment at least annually and at the time of a triggering event requiring re-evaluation, For impairment testing purposes, goodwill has been allocated to the Company’s U.S. Business reporting unit and the European Business reporting unit (included within the International Business reportable segment) based upon the goodwill derived from each acquisition (See Note 16). The Company has designated April 30 th Intangible Assets Indefinite-lived intangible assets are tested for impairment at least annually and are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Indefinite-lived intangible assets are impaired if their estimated fair values are less than their carrying values. Finite-lived intangible assets, if any, are amortized over their estimated useful life, which is the period over which the assets are expected to contribute directly or indirectly to the future cash flows of the Company. These intangible assets are tested for impairment at the time of a triggering event, if one were to occur. Finite-lived intangible assets may be impaired when the estimated undiscounted future cash flows generated from the assets are less than their carrying amounts. The Company may rely on a qualitative assessment when performing its intangible asset impairment test. Otherwise, the impairment evaluation is performed at the lowest level of identifiable cash flows independent of other assets. The Company has designated November 30 th Stock-Based Awards Accounting for stock-based compensation requires the measurement and recognition of compensation expense for all equity awards based on estimated fair values. Stock-based compensation is measured based on the grant-date fair value of the award and is amortized over the relevant service period. Income Taxes The Company accounts for income taxes using the liability method, which requires the determination of deferred tax assets and liabilities based on the differences between the financial and tax basis of assets and liabilities using the enacted tax rates in effect for the year in which differences are expected to reverse. Deferred tax assets are adjusted by a valuation allowance if, based on the weight of available evidence, it is more-likely-than-not In order to recognize and measure any unrecognized tax benefits, management evaluates and determines whether any of its tax positions are more-likely-than-not Non-income Third Party Sharing Arrangements The Company pays a percentage of its advisory fee revenues based on incremental growth in AUM, subject to caps or minimums, to marketing agents to sell WisdomTree ETFs and for including WisdomTree ETFs on third party customer platforms. Business Combinations and Acquisitions The Company includes the results of operations of the businesses that it acquires from the respective dates of acquisition. The fair values of the purchase price of the acquisitions are allocated to the assets acquired and liabilities assumed based on their estimated fair values. The excess of the fair value of purchase price over the fair values of these identifiable assets and liabilities is recorded as goodwill. The Company may allocate purchase price to identifiable intangible assets. The estimated fair value of identifiable intangible assets is based on critical estimates, judgments and assumptions derived from: analysis of market conditions; revenue and revenue growth assumptions; profitability assumptions; discount rates; customer retention rates; and estimated useful lives. Recently Issued Accounting Pronouncements In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments-Credit Losses (Topic 326) – Measurement of Credit Losses on Financial Instruments 2016-13). off-balance held-to-maturity) held-to-maturity 2016-13 In March 2016, the FASB issued ASU 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting 2016-09). ASU 2016-09 paid-in In February 2016, the FASB issued ASU 2016-02, Leases 2016-02), 2016-02 In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes 2015-17), ASU 2015-17 2015-17 In February 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis 2015-02), ASC 810-10-65-2(a), 2015-02 In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers 2014-09), 2016-08, 2016-10, 2016-12, 2014-09. 2014-09

Cash and Cash Equivalents

Cash and Cash Equivalents	12 Months Ended
	Dec. 31, 2016
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents	3. Cash and Cash Equivalents Cash and cash equivalents of approximately $56,484 and $152,103 at December 31, 2016 and December 31, 2015, respectively, were held at one financial institution. At December 31, 2016 and December 31, 2015, cash equivalents were approximately $55,619 and $137,481, respectively.

Securities Owned and Securities

Securities Owned and Securities Sold, but not yet Purchased (and Fair Value Measurement)	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Securities Owned and Securities Sold, but not yet Purchased (and Fair Value Measurement)	4. Securities Owned and Securities Sold, but not yet Purchased (and Fair Value Measurement) Securities owned and securities sold, but not yet purchased are measured at fair value. The fair value of securities is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., “the exit price”) in an orderly transaction between market participants at the measurement date. ASC 820, Fair Value Measurements Level 1 – Quoted prices for identical instruments in active markets. Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable. Level 3 – Instruments whose significant drivers are unobservable. The availability of observable inputs can vary from product to product and is effected by a wide variety of factors, including, for example, the type of product, whether the product is new and not yet established in the marketplace, and other characteristics particular to the transaction. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by management in determining fair value is greatest for instruments categorized in Level 3. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest level input that is significant to the fair value measurement in its entirety. Fair Valuation Methodology Cash and Cash Equivalents Securities (Held-to-Maturity) Securities Owned/Sold But Not Yet Purchased December 31, 2016 2015 Securities Owned Trading securities $ 1,556 $ — Available-for-sale 57,351 — Total $ 58,907 $ — Securities Sold, but not yet Purchased Trading securities $ 1,248 $ — Available-for-sale — — Total $ 1,248 $ — Trading securities are investments in exchange traded funds. These instruments are generally traded in active, quoted and highly liquid markets and are therefore classified as Level 1 within the fair value hierarchy. AFS securities are investments in short-term investment grade corporate bonds and are classified as Level 2. Fair value is generally derived from observable bids for these Level 2 financial instruments. AFS Securities The following table summarizes unrealized gains, losses and fair value of the AFS securities: December 31, 2016 2015 Cost $ 57,615 $ — Gross unrealized gains in other comprehensive income — — Gross unrealized losses in other comprehensive income (264 ) — Fair value $ 57,351 $ — All of the Company’s AFS securities are due within one year. The Company assesses the AFS securities for other-than-temporary impairment on a quarterly basis. No AFS securities were determined to be other-than-temporarily impaired for the year ending December 31, 2016. Acquisition Payable (See Note 15) As of December 31, 2015, the Company estimated the fair value of the acquisition payable to be $9,900, of which $3,942 was recorded on the Consolidated Balance Sheets. The fair value was categorized as Level 3 and was based on a predefined formula that included the following inputs, many of which were unobservable: the contractual minimum payment obligation, projected European AUM (ranging from $1,000,000 to $6,000,000), the Company’s enterprise value over global AUM, and operating results of the European business. The fair value was determined using a discounted cash flows analysis using a discount rate of 27.5%. Significant increases (decreases) to the projected AUM of the European listed ETPs or operating results of the European business in isolation would have resulted in a higher (lower) fair value measurement. Significant increases (decreases) to the discount rate in isolation would have resulted in a lower (higher) fair value measurement. In May 2016, the Company accelerated the buyout of the remaining minority interest in its European business. Acquisition payment expense recognized during the year ended December 31, 2016 was $6,738, of which $5,993 was recorded during the three months ended June 30, 2016 in connection with the acceleration of the buyout. The remaining acquisition payable recorded on the Consolidated Balance Sheets was $3,537 at December 31, 2016 (See Note 15).

Securities Held-to-Maturity

Securities Held-to-Maturity	12 Months Ended
	Dec. 31, 2016
Text Block [Abstract]
Securities Held-to-Maturity	5. Securities Held-to-Maturity The following table is a summary of the Company’s securities held-to-maturity: December 31, 2016 2015 Federal agency debt instruments $ 22,496 $ 23,689 The following table summarizes unrealized gains, losses, and fair value of securities held-to-maturity: December 31, 2016 2015 Cost/amortized cost $ 22,496 $ 23,689 Gross unrealized gains 13 82 Gross unrealized losses (1,353 ) (609 ) Fair value $ 21,156 $ 23,162 The Company assesses these securities for other-than-temporary impairment on a quarterly basis. No securities were determined to be other-than-temporarily impaired for the years ending December 31, 2016 and 2015. The Company does not intend to sell these securities and it is not more likely than not that the Company will be required to sell the securities before recovery of their amortized cost bases, which may be maturity. The following table sets forth the maturity profile of the securities held-to-maturity; December 31, 2016 2015 Due within one year $ 3,994 $ — Due one year through five years 1,023 8,369 Due five years through ten years 4,031 3,127 Due over ten years 13,448 12,193 Total $ 22,496 $ 23,689

Investment, Carried at Cost

Investment, Carried at Cost	12 Months Ended
	Dec. 31, 2016
Investments Schedule [Abstract]
Investment, Carried at Cost	6. Investment, Carried at Cost On November 18, 2016, the Company made a strategic investment in AdvisorEngine, Inc., formerly known as Vanare, an end-to-end The Company invested $20,000 in AdvisorEngine for 11,811,856 convertible preferred shares (“Series A Preferred”), which is the equivalent to a 36% fully diluted equity ownership interest. The Series A Preferred contains various rights and protections including a non-cumulative in-substance This investment is assessed for impairment on a quarterly basis. No impairment existed at December 31, 2016.

Fixed Assets

Fixed Assets	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Fixed Assets	7. Fixed Assets The following table summarizes fixed assets: December 31, 2016 2015 Equipment $ 1,739 $ 1,258 Furniture and fixtures 2,393 2,382 Leasehold improvements 10,877 10,312 Less accumulated depreciation and amortization (3,261 ) (1,978 ) Total $ 11,748 $ 11,974

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	8. Commitments and Contingencies Contractual Obligations The Company has entered into obligations under operating leases with initial non-cancelable Future minimum lease payments with respect to non-cancelable 2017 $ 4,020 2018 3,379 2019 2,947 2020 2,866 2021 and thereafter 24,079 Total $ 37,291 Letter of Credit The Company collateralized its U.S. office lease through a standby letter of credit totaling $1,384. The collateral is included in cash and cash equivalents on the Company’s Consolidated Balance Sheets. Contingencies The Company is subject to various reviews, inspections and investigations by regulatory authorities as well as legal proceedings arising in the ordinary course of business. The Company is not currently party to any litigation that is expected to have a material impact on its business, financial position, results of operations or cash flows.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
Related Party Transactions	9. Related Party Transactions The Company’s revenues are derived primarily from investment advisory agreements with related parties. Under these agreements, the Company has licensed to related parties the use of certain of its own indexes for the U.S. and Canadian WisdomTree ETFs and WisdomTree UCITS ETFs. The Board of Trustees and Board of Directors of the related parties are primarily responsible for overseeing the management and affairs of the U.S. and Canadian WisdomTree ETFs, Boost ETPs and WisdomTree UCITS ETFs for the benefit of their shareholders and have contracted with the Company to provide for general management and administration services. The Company is also responsible for certain expenses of the related parties, including the cost of transfer agency, custody, fund administration and accounting, legal, audit, and other non-distribution The following table summarizes accounts receivable from related parties which are included as a component of Accounts receivable on the Company’s Consolidated Balance Sheets: December 31, 2016 2015 Receivable from WTT $ 16,506 $ 24,560 Receivable from BI and WTI 645 487 Receivable from WTCS 158 — Receivable from WTAMC 40 — Total $ 17,349 $ 25,047 The following table summarizes revenues from advisory services provided to related parties: Year Ended December 31, 2016 2015 2014 Advisory services provided to WTT $ 209,199 $ 293,788 $ 181,987 Advisory services provided to BI and WTI 7,251 4,156 829 Advisory services provided to WTCS 1,867 — — Advisory services provided to WTAMC 148 — — Total $ 218,465 $ 297,944 $ 182,816 The Company also has an investment in a WisdomTree ETF of approximately $1,300 at December 31, 2016. For the year ended December 31, 2016, the Company has recorded losses of approximately $12 within other income on the Consolidated Statements of Operations.

Stock-Based Awards

Stock-Based Awards	12 Months Ended
	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Awards	10. Stock-Based Awards The Company grants equity awards to employees and directors which include restricted stock awards and stock options. Options may be issued for terms of ten years and may vest after at least one year and have an exercise price equal to the Company’s stock price on the grant date. Restricted stock awards are generally valued based on the Company’s stock price on the grant date. The Company estimates the fair value for options using the Black-Scholes option pricing model. All restricted stock and option awards require future service as a condition of vesting with certain awards subject to acceleration under certain conditions. On June 20, 2016, the Company’s stockholders approved a new equity award plan under which the Company can issue up to 10,000,000 shares of common stock (less one share for every share granted under prior plans since March 31, 2016 and inclusive of shares available under the prior plans as of March 31, 2016) in the form of stock options and other stock-based awards. The Company also has issued from time to time stock-based awards outside a plan. For the years ended December 31, 2016, 2015 and 2014, total stock-based compensation expense was $14,892, $10,900 and $8,137, respectively, and the related tax benefit recognized in the Consolidated Statements of Operations was $5,324, $4,149 and $2,973, respectively. The actual tax benefit realized for the tax deductions for share-based compensation was $12,877, $67,532 and $23,309 for the years ended December 31, 2016, 2015 and 2014, respectively. A summary of unrecognized stock-based compensation expense and average remaining vesting period is as follows: Unrecognized Stock-Based Average Employees and directors option awards $ 8 0.07 Employees and directors restricted stock awards $ 20,714 1.79 Stock Options A summary of option activity is as follows: Options Weighted- Outstanding January 1, 2014 7,844,691 $ 1.29 Granted — — Forfeitures/expirations — — Exercised (2,514,621 ) 0.61 Outstanding at December 31, 2014 5,330,070 $ 1.61 Granted — — Forfeitures/expirations — — Exercised (3,785,473 ) 1.19 Outstanding at December 31, 2015 1,544,597 $ 2.62 Granted — — Forfeitures/expirations — — Exercised (176,350 ) 1.11 Outstanding at December 31, 2016 (1) 1,368,247 $ 2.82 (1) Expire on dates ranging from March 4, 2017 to November 15, 2021. The total intrinsic value of options exercised for the years ended December 31, 2016, 2015 and 2014 was $1,794, $76,329 and $36,226, respectively. Cash received from option exercise for the years ended December 31, 2016, 2015 and 2014 was $195, $4,520 and $1,544, respectively. The following table summarizes information on stock options outstanding at December 31, 2016: Options Outstanding Options Exercisable Range of Exercise Prices Shares Weighted- Weighted- Shares Weighted- Life (Years) Weighted- $0.70 – $0.70 435,000 2.1 $ 0.70 435,000 2.1 $ 0.70 $1.07 – $1.07 93,535 1.0 1.07 93,535 1.0 1.07 $2.09 – $2.26 390,176 2.4 2.20 390,176 2.4 2.20 $5.05 – $5.05 285,000 4.1 5.05 247,500 4.1 5.05 $6.36 – $6.82 74,536 4.4 6.46 74,536 4.4 6.46 $7.01 – $8.51 90,000 4.7 7.48 90,000 4.7 7.48 1,368,247 2.8 $ 2.82 1,330,747 2.8 $ 2.76 At December 31, 2016, outstanding options for 1,368,247 shares had a remaining average contractual term of 2.8 years and an intrinsic value of $11,386. Outstanding options for 1,330,747 were exercisable, had a remaining average contractual term of 2.8 years and an intrinsic value of $11,158. Restricted stock The Company grants restricted stock to employees and directors. All restricted stock awards require future service as a condition of vesting with certain awards subject to acceleration under certain conditions. Restricted stock awards generally vest over three years. A summary of restricted stock activity is as follows: Shares Weighted- Unvested Balance at January 1, 2014 1,896,877 $ 7.27 Granted 623,088 16.08 Vested (996,385 ) 6.73 Forfeited (9,641 ) 10.81 Unvested Balance at December 31, 2014 1,513,939 $ 11.22 Granted 886,413 19.72 Vested (753,917 ) 10.05 Forfeited (25,709 ) 17.30 Unvested Balance at December 31, 2015 1,620,726 $ 16.32 Granted 1,687,553 11.19 Vested (846,386 ) 13.98 Forfeited (25,439 ) 16.17 Unvested Balance at December 31, 2016 2,436,454 $ 13.58

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	11. Employee Benefit Plans The Company has a 401(k) savings plan covering all eligible employees in which the Company can make discretionary contributions from its profits. A summary of the Company made discretionary contributions is as follows: Year Ended December 31, 2016 2015 2014 $ 934 $ 763 $ 588

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2016
Earnings Per Share [Abstract]
Earnings Per Share	12. Earnings Per Share The following is a reconciliation of the basic and diluted earnings per share computation: Year Ended December 31, 2016 2015 2014 Net income $ 26,155 $ 80,052 $ 61,051 (shares in thousands) Shares of common stock and common stock equivalents: Weighted average common shares used in basic computation 134,401 137,242 131,770 Dilutive effect of common stock equivalents 1,138 1,583 6,781 Weighted average common shares used in dilutive computation 135,539 138,825 138,551 Basic earnings per share $ 0.19 $ 0.58 $ 0.46 Diluted earnings per share $ 0.19 $ 0.58 $ 0.44 In the table above, unvested share-based awards that have non-forfeitable Diluted earnings per share reflects the reduction in earnings per share assuming options or other contracts to issue common stock were exercised or converted into common stock (if dilutive) under the treasury stock method. The Company excluded 996,000 and 1,247,000 common stock equivalents from its computation of diluted earnings per share for the years ended December 31, 2016 and 2014, respectively, as they were determined to be anti-dilutive. There were no anti-dilutive common stock equivalents included in the calculation of diluted earnings per share for the year ended December 31, 2015.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	13. Income Taxes The components of current and deferred income tax expense included in the Consolidated Statement of Operations for years ended December 31, 2016, 2015 and 2014 as determined in accordance with ASC 740, Income Taxes Year Ended December 31, 2016 2015 2014 Current: Federal $ 14,515 $ 1,598 $ — State and local 1,425 2,431 94 Foreign 567 210 — 16,507 4,239 94 Deferred: Federal 10,629 46,784 10,739 State and local 2,296 6,233 1,664 Foreign (25 ) (123 ) — 12,900 52,894 12,403 Income tax expense from operations $ 29,407 $ 57,133 $ 12,497 A reconciliation of the statutory federal income tax rate of 35% and the Company’s effective rate is as follows: December 31, 2016 2015 2014 Federal statutory rate 35.00 % 35.00 % 35.00 % Change in valuation allowance 8.16 % 0.90 % (27.74 %) State income tax rate, net of federal benefit 4.17 % 4.11 % 1.55 % Acquisition expense 4.06 % 0.61 % — Goodwill impairment 1.16 % — — Foreign tax differential 0.68 % 0.82 % 0.82 % Change in effective state rate 0.22 % (0.06 %) 6.86 % Other differences, net (0.52 %) 0.27 % 0.50 % Effective rate 52.93 % 41.65 % 16.99 % Net Operating Losses – U.S . The Company’s pre-tax The Company no longer has any NOLs related to vested stock-based compensation awards that were previously unrecognized under GAAP. Such NOLs were utilized during the year ended December 31, 2016 to reduce the Company’s tax liability with a corresponding credit to additional paid-in Net Operating Losses – International The Company’s European and Canadian subsidiaries generated NOLs outside the U.S. The following table summarizes the activity for these NOLs for the years ended December 31, 2016, 2015 and 2014, respectively. December 31, 2016 2015 2014 Balance – Beginning of year (pre-tax) $ 10,746 $ 4,061 $ — Foreign subsidiaries tax losses 12,960 6,685 4,061 Balance – End of year (pre-tax) $ 23,706 $ 10,746 $ 4,061 Tax Rate – Blended 19.2 % 19.1 % 20.1 % Balance – End of year (tax effected) $ 4,551 $ 2,051 $ 816 At December 31, 2016, 2015, and 2014, the Company established a full valuation allowance related to these NOLs as it is more-likely-than-not Deferred Tax Assets A summary of the components of the Company’s deferred tax assets at December 31, 2016 and 2015 are as follows: December 31, 2016 2015 Deferred tax assets: Stock-based compensation $ 5,382 $ 4,868 Accrued expenses 4,552 10,197 NOLs – Foreign 4,551 2,051 Deferred rent liability 2,024 2,116 NOLs – U.S. 1,611 1,828 Unrealized losses 101 5 Other 227 82 Deferred tax assets 18,448 21,147 Deferred tax liabilities Fixed assets 2,405 2,272 Incentive compensation 1,365 2,753 Goodwill and intangible assets 301 — Deferred tax liabilities 4,071 5,025 Total deferred tax assets less deferred tax liabilities 14,377 16,122 Less: valuation allowance (4,551 ) (2,051 ) Deferred tax assets, net $ 9,826 $ 14,071 Uncertain tax positions The Company determined that it has no unrecognized tax benefits as of December 31, 2016 and 2015 as defined within ASC 740-10. Income Tax Examinations The Company is subject to U.S. federal income tax as well as income tax of multiple state, local and certain foreign jurisdictions. The Company’s 2013 federal income tax return is currently under audit. Tax returns filed with each jurisdiction generally remain open to examination under the normal three-year statute of limitation. As of December 31, 2016, with few exceptions, the Company was no longer subject to income tax examinations by any taxing authority for years before 2013. Undistributed Earnings of Foreign Subsidiaries The Company recognizes deferred tax liabilities associated with outside basis differences on investments in foreign subsidiaries unless the difference is considered essentially permanent in duration. As of December 31, 2016, all of the Company’s undistributed earnings and profits, which are not currently significant, are considered essentially permanent in duration.

Shares Repurchased

Shares Repurchased	12 Months Ended
	Dec. 31, 2016
Equity [Abstract]
Shares Repurchased	14. Shares Repurchased On October 29, 2014, the Company’s Board of Directors authorized a three-year share repurchase program of up to $100,000. On April 27, 2016, the Board of Directors approved a $60,000 increase to the Company’s share repurchase program and extended the term through April 27, 2019. Included under this program are purchases to offset future equity grants made under the Company’s equity plans and are made in open market or privately negotiated transactions. This authority may be exercised from time to time and in such amounts as market conditions warrant, and subject to regulatory considerations. The timing and actual number of shares repurchased depends on a variety of factors including price, corporate and regulatory requirements, market conditions and other corporate liquidity requirements and priorities. The repurchase program may be suspended or terminated at any time without prior notice. Shares repurchased under this program are returned to the status of authorized and unissued on the Company’s books and records. During the years ended December 31, 2016, 2015 and 2014, the Company repurchased 3,778,932 shares, 1,190,356 shares and 415,834 shares of its common stock, respectively, under this program for an aggregate cost of $39,379, $24,116 and $6,531, respectively. As of December 31, 2016, $96,505 remains under this program for future purchases.

Business Combinations and Acqui

Business Combinations and Acquisitions	12 Months Ended
	Dec. 31, 2016
Business Combinations [Abstract]
Business Combinations and Acquisitions	15. Business Combinations and Acquisitions GreenHaven Acquisition (allocated to the Company’s U.S. Business reporting unit) Effective January 1, 2016, the Company acquired the outstanding membership interest in each of GreenHaven Commodity Services, LLC, the managing owner of the GreenHaven Continuous Commodity Index Fund (“Commodities ETF”), and GreenHaven Coal Services, LLC, the sponsor of the GreenHaven Coal Fund (“Coal ETF”), from GreenHaven, LLC and GreenHaven Group LLC, respectively, for $11,825 in cash. As part of the acquisition, the Company recognized an intangible asset related to its customary advisory agreement with the Commodities ETF of $9,953 and goodwill of $1,799 (which primarily represents potential future performance of the funds), both of which are deductible for tax purposes. The following table summarizes the purchase price allocation: Fair value acquired: Assets $ 205 Goodwill 1,799 Intangible asset 9,953 Total assets acquired $ 11,957 Less: Liabilities (132 ) Total $ 11,825 The Company closed the Coal ETF on September 29, 2016. Boost Acquisition (allocated to the Company’s “European Business” reporting unit) In April 2014, the Company acquired a 75% majority stake in its European business (formerly Boost), with an obligation to buy out the remaining minority interest on or about March 31, 2018. No consideration was transferred on the acquisition date. The acquisition of the remaining minority interest was to be calculated using a predefined formula based on the 180-day 180-day Because the Company was required to redeem the remaining 25% interest using a predefined formula, under U.S. GAAP, the Company did not record this interest as a non-controlling The minority shareholders, who remained employed with the Company, were guaranteed a minimum payment of $1,757 for their interest if they terminate their employment without good reason or they are terminated for cause prior to December 31, 2017. The Company determined that this minimum payment represented consideration transferred and was recognized and measured at acquisition-date fair value. The acquisition gave rise to goodwill of $1,676 which represented the excess of the consideration transferred over the $81 fair value of the net assets acquired, consisting primarily of accounts receivable, accounts payable and fixed assets (See Note 16). The goodwill is not tax deductible. Any future payments made in connection with this acquisition was accounted for separately from the business combination and represents compensation for post-acquisition services. For the year ended December 31, 2015, the Company recorded $997 of compensation expense and $1,188 of interest expense reflected within acquisition payment expense on the Company’s Consolidated Statements of Operations. In May 2016, the Company accelerated the buyout and completed the purchase of the remaining minority interest. Acquisition payment expense recorded during the year ended December 31, 2016 was $6,738, of which $5,993 was recognized during the three months ended June 30, 2016 as a result of the acceleration of the buyout. Amounts payable in connection with this acquisition at December 31, 2016 and 2015 were $3,537 and $3,942, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	16. Goodwill and Intangible Assets Goodwill During the fourth quarter of 2016, the Company reorganized its reporting structure which resulted in a change in the composition of its reporting units (See Note 17). Previously, the Company had a single reporting unit. This change resulted in the reassignment of the Company’s goodwill to the reorganized reporting units as follows: Reporting Unit U.S. Business European Business (1) Total Balance at January 1, 2016 $ — $ 1,676 $ 1,676 Increases/(decreases) GreenHaven acquisition 1,799 — 1,799 Goodwill impairment – Boost — (1,676 ) (1,676 ) Balance at December 31, 2016 $ 1,799 $ — $ 1,799 (1) Europe is included within the Company’s International Business reportable segment. The Company has designated April 30 th Intangible Asset (Indefinite-Lived) As part of the GreenHaven acquisition, the Company identified an intangible asset related to its customary advisory agreement with the GreenHaven Commodities ETF for $9,953. This intangible asset (which is deductible for tax purposes) was determined to have an indefinite useful life. The Company has designated November 30 th Total Balance at January 1, 2016 $ — Increases – Advisory agreement (Commodities) 9,953 Balance at December 31, 2016 $ 9,953 During the fourth quarter of 2016, the Company performed its indefinite-lived intangible asset impairment test. The results of this analysis identified no impairment.

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Segment Reporting	17. Segment Reporting The Company operates as an ETP sponsor and asset manager providing investment advisory services in the U.S., Europe, Canada and Japan. These activities are reported in the Company’s U.S. Business and International Business reportable segments. The U.S. Business segment includes the results of the Company’s U.S. operations and Japan sales office. The results of the Company’s European and Canadian operations are reported as the International Business segment. Information concerning these reportable segments are as follows: Year Ended December 31, 2016 2015 2014 Revenues (U.S. Business segment) Advisory fees $ 211,066 $ 293,788 $ 181,987 Other income 1,424 931 960 Total revenues (U.S. Business segment) $ 212,490 $ 294,719 $ 182,947 Revenues (International Business segment) Advisory fees $ 7,399 $ 4,156 $ 829 Other income (443 ) 67 (14 ) Total revenues (International Business segment) $ 6,956 $ 4,223 $ 815 Total revenues $ 219,446 $ 298,942 $ 183,762 Income/(loss) before taxes U.S. Business segment $ 74,721 $ 146,335 $ 78,631 International Business segment (19,159 ) (9,150 ) (5,083 ) Total income before taxes $ 55,562 $ 137,185 $ 73,548 Assets are not reported by segment as such information is not utilized by the chief operating decision maker. The vast majority of the Company’s assets are located in the U.S.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	18. Subsequent Events The Company has evaluated subsequent events through the date of issuance of the accompanying consolidated financial statements. There were no events requiring disclosure.

Significant Accounting Polici26

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation These consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) and in the opinion of management reflect all adjustments, consisting of only normal recurring adjustments, necessary for a fair statement of financial condition, results of operations, and cash flows for the periods presented. The consolidated financial statements include the accounts of the Company’s wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Certain accounts in the prior years’ consolidated financial statements have been reclassified to conform to the current year’s consolidated financial statements presentation. These reclassifications had no effect on the previously reported operating results.
Consolidation	Consolidation The Company consolidates entities in which it has a controlling financial interest. The Company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity (“VOE”) or a variable interest entity (“VIE”). The usual condition for a controlling financial interest in a VOE is ownership of a majority voting interest. If the Company has a majority voting interest in a VOE, the entity is consolidated. The Company has a controlling financial interest in a VIE when the Company has a variable interest that provides it with (i) the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. The Company had no variable interests in any VIEs at December 31, 2016 and 2015.
Segment and Geographic Information	Segment and Geographic Information The Company operates as an ETP sponsor and asset manager providing investment advisory services in the U.S., Europe, Canada and Japan. These activities are reported in the Company’s U.S. Business and International Business reportable segments. The U.S. Business segment includes the results of the Company’s U.S. operations and Japan sales office, which primarily engages in selling U.S. listed ETFs to Japanese institutions. The results of the Company’s European and Canadian operations are reported as the International Business segment. Revenues are primarily derived in the U.S. and the vast majority of the Company’s AUM is currently located in the U.S.
Foreign Currency Translation	Foreign Currency Translation Assets and liabilities of subsidiaries whose functional currency is not the U.S. dollar are translated based on the end of period exchange rates from local currency to U.S. dollars. Results of operations are translated at the average exchange rates in effect during the period.
Use of Estimates	Use of Estimates The preparation of the Company’s consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the balance sheet dates and the reported amounts of revenues and expenses for the periods presented. Actual results could differ materially from those estimates.
Revenue Recognition	Revenue Recognition The Company earns investment advisory fees from its ETPs, as well as licensing fees from third parties. ETP advisory fees are based on a percentage of the ETPs’ average daily net assets and recognized over the period the related service is provided. Licensing fees are based on a percentage of the average monthly net assets and recognized over the period the related service is provided.
Depreciation and Amortization	Depreciation and Amortization Depreciation is provided for using the straight-line method over the estimated useful lives of the related assets as follows: Equipment 5 years Furniture and fixtures 15 years Leasehold improvements are amortized over the term of their respective leases or service lives of the improvements, whichever is shorter. Fixed assets are stated at cost less accumulated depreciation and amortization.
Occupancy	Occupancy The Company accounts for its office lease facilities as operating leases, which may include free rent periods and escalation clauses. The Company expenses the lease payments associated with operating leases on a straight-line basis over the lease term.
Marketing and Advertising	Marketing and Advertising Advertising costs, including media advertising and production costs, are expensed when incurred.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid investments with an original maturity of 90 days or less at the time of purchase to be classified as cash equivalents.
Accounts Receivable and Allowance for Doubtful Accounts	Accounts Receivable and Allowance for Doubtful Accounts Accounts receivable are customer and other obligations due under normal trade terms. An allowance for doubtful accounts is not provided since, in the opinion of management, all accounts receivable recorded are deemed collectible.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets The Company performs a review for the impairment of long-lived assets when events or changes in circumstances indicate that the estimated undiscounted future cash flows expected to be generated by the assets are less than their carrying amounts or when other events occur which may indicate that the carrying amount of an asset may not be recoverable.
Earnings per Share	Earnings per Share Basic earnings per share (“EPS”) is computed by dividing net income available to common stockholders by the weighted-average number of common shares outstanding for the period. Net income available to common stockholders represents net income of the Company reduced by an allocation of earnings to participating securities. Unvested share-based payment awards that contain non-forfeitable two-class two-class
Securities Owned and Securities Sold, but not yet Purchased (at fair value)	Securities Owned and Securities Sold, but not yet Purchased (at fair value) Securities owned and securities sold, but not yet purchased are securities classified as either trading or available-for-sale
Securities Held-to-Maturity	Securities Held-to-Maturity The Company accounts for certain of its investments as held-to-maturity held-to-maturity more-likely-than-not
Investment, Carried at Cost	Investment, Carried at Cost The Company accounts for equity securities that do not have a readily determinable fair value as cost method investments to the extent such investments are not subject to consolidation or the equity method. Income is recognized when dividends are received only to the extent they are distributed from net accumulated earnings of the investee. Otherwise, such distributions are considered returns of investment and are recorded as a reduction of the cost of the investment. Cost method investments held by the Company are assessed for impairment on a quarterly basis.
Goodwill	Goodwill Goodwill is the excess of the fair value of the purchase price over the fair values of the identifiable net assets at the acquisition date. The Company tests its goodwill for impairment at least annually and at the time of a triggering event requiring re-evaluation, For impairment testing purposes, goodwill has been allocated to the Company’s U.S. Business reporting unit and the European Business reporting unit (included within the International Business reportable segment) based upon the goodwill derived from each acquisition (See Note 16). The Company has designated April 30 th
Intangible Assets	Intangible Assets Indefinite-lived intangible assets are tested for impairment at least annually and are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Indefinite-lived intangible assets are impaired if their estimated fair values are less than their carrying values. Finite-lived intangible assets, if any, are amortized over their estimated useful life, which is the period over which the assets are expected to contribute directly or indirectly to the future cash flows of the Company. These intangible assets are tested for impairment at the time of a triggering event, if one were to occur. Finite-lived intangible assets may be impaired when the estimated undiscounted future cash flows generated from the assets are less than their carrying amounts. The Company may rely on a qualitative assessment when performing its intangible asset impairment test. Otherwise, the impairment evaluation is performed at the lowest level of identifiable cash flows independent of other assets. The Company has designated November 30 th
Stock-Based Awards	Stock-Based Awards Accounting for stock-based compensation requires the measurement and recognition of compensation expense for all equity awards based on estimated fair values. Stock-based compensation is measured based on the grant-date fair value of the award and is amortized over the relevant service period.
Income Taxes	Income Taxes The Company accounts for income taxes using the liability method, which requires the determination of deferred tax assets and liabilities based on the differences between the financial and tax basis of assets and liabilities using the enacted tax rates in effect for the year in which differences are expected to reverse. Deferred tax assets are adjusted by a valuation allowance if, based on the weight of available evidence, it is more-likely-than-not In order to recognize and measure any unrecognized tax benefits, management evaluates and determines whether any of its tax positions are more-likely-than-not Non-income
Third Party Sharing Arrangements	Third Party Sharing Arrangements The Company pays a percentage of its advisory fee revenues based on incremental growth in AUM, subject to caps or minimums, to marketing agents to sell WisdomTree ETFs and for including WisdomTree ETFs on third party customer platforms.
Business Combinations and Acquisitions	Business Combinations and Acquisitions The Company includes the results of operations of the businesses that it acquires from the respective dates of acquisition. The fair values of the purchase price of the acquisitions are allocated to the assets acquired and liabilities assumed based on their estimated fair values. The excess of the fair value of purchase price over the fair values of these identifiable assets and liabilities is recorded as goodwill. The Company may allocate purchase price to identifiable intangible assets. The estimated fair value of identifiable intangible assets is based on critical estimates, judgments and assumptions derived from: analysis of market conditions; revenue and revenue growth assumptions; profitability assumptions; discount rates; customer retention rates; and estimated useful lives.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments-Credit Losses (Topic 326) – Measurement of Credit Losses on Financial Instruments 2016-13). off-balance held-to-maturity) held-to-maturity 2016-13 In March 2016, the FASB issued ASU 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting 2016-09). ASU 2016-09 paid-in In February 2016, the FASB issued ASU 2016-02, Leases 2016-02), 2016-02 In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes 2015-17), ASU 2015-17 2015-17 In February 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis 2015-02), ASC 810-10-65-2(a), 2015-02 In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers 2014-09), 2016-08, 2016-10, 2016-12, 2014-09. 2014-09

Significant Accounting Polici27

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Schedule of Estimated Useful Lives of Related Assets	Depreciation is provided for using the straight-line method over the estimated useful lives of the related assets as follows: Equipment 5 years Furniture and fixtures 15 years

Securities Owned and Securiti28

Securities Owned and Securities Sold, but not yet Purchased (and Fair Value Measurement) (Tables)	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Schedule of Securities Owned/Sold But Not Yet Purchased	Securities Owned/Sold But Not Yet Purchased December 31, 2016 2015 Securities Owned Trading securities $ 1,556 $ — Available-for-sale 57,351 — Total $ 58,907 $ — Securities Sold, but not yet Purchased Trading securities $ 1,248 $ — Available-for-sale — — Total $ 1,248 $ —
Schedule of Unrealized Gains, Losses and Fair Value of AFS Securities	The following table summarizes unrealized gains, losses and fair value of the AFS securities: December 31, 2016 2015 Cost $ 57,615 $ — Gross unrealized gains in other comprehensive income — — Gross unrealized losses in other comprehensive income (264 ) — Fair value $ 57,351 $ —

Securities Held-to-Maturity (Ta

Securities Held-to-Maturity (Tables)	12 Months Ended
	Dec. 31, 2016
Text Block [Abstract]
Schedule of Securities Held-to-Maturity	The following table is a summary of the Company’s securities held-to-maturity: December 31, 2016 2015 Federal agency debt instruments $ 22,496 $ 23,689
Schedule of Unrealized Gains, Losses and Fair Value of Securities Held-to-Maturity	The following table summarizes unrealized gains, losses, and fair value of securities held-to-maturity: December 31, 2016 2015 Cost/amortized cost $ 22,496 $ 23,689 Gross unrealized gains 13 82 Gross unrealized losses (1,353 ) (609 ) Fair value $ 21,156 $ 23,162
Schedule of Maturity Profile of Securities Held-to-Maturity	The following table sets forth the maturity profile of the securities held-to-maturity; December 31, 2016 2015 Due within one year $ 3,994 $ — Due one year through five years 1,023 8,369 Due five years through ten years 4,031 3,127 Due over ten years 13,448 12,193 Total $ 22,496 $ 23,689

Fixed Assets (Tables)

Fixed Assets (Tables)	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Schedule of Fixed Assets	The following table summarizes fixed assets: December 31, 2016 2015 Equipment $ 1,739 $ 1,258 Furniture and fixtures 2,393 2,382 Leasehold improvements 10,877 10,312 Less accumulated depreciation and amortization (3,261 ) (1,978 ) Total $ 11,748 $ 11,974

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments	Future minimum lease payments with respect to non-cancelable 2017 $ 4,020 2018 3,379 2019 2,947 2020 2,866 2021 and thereafter 24,079 Total $ 37,291

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
Summary of Accounts Receivable from Related Parties	The following table summarizes accounts receivable from related parties which are included as a component of Accounts receivable on the Company’s Consolidated Balance Sheets: December 31, 2016 2015 Receivable from WTT $ 16,506 $ 24,560 Receivable from BI and WTI 645 487 Receivable from WTCS 158 — Receivable from WTAMC 40 — Total $ 17,349 $ 25,047
Summary of Revenues from Advisory Services Provided to Related Parties	The following table summarizes revenues from advisory services provided to related parties: Year Ended December 31, 2016 2015 2014 Advisory services provided to WTT $ 209,199 $ 293,788 $ 181,987 Advisory services provided to BI and WTI 7,251 4,156 829 Advisory services provided to WTCS 1,867 — — Advisory services provided to WTAMC 148 — — Total $ 218,465 $ 297,944 $ 182,816

Stock-Based Awards (Tables)

Stock-Based Awards (Tables)	12 Months Ended
	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Unrecognized Stock-Based Compensation Expense and Average Remaining Vesting Period	A summary of unrecognized stock-based compensation expense and average remaining vesting period is as follows: Unrecognized Stock-Based Average Employees and directors option awards $ 8 0.07 Employees and directors restricted stock awards $ 20,714 1.79
Summary of Option Activity	A summary of option activity is as follows: Options Weighted- Outstanding January 1, 2014 7,844,691 $ 1.29 Granted — — Forfeitures/expirations — — Exercised (2,514,621 ) 0.61 Outstanding at December 31, 2014 5,330,070 $ 1.61 Granted — — Forfeitures/expirations — — Exercised (3,785,473 ) 1.19 Outstanding at December 31, 2015 1,544,597 $ 2.62 Granted — — Forfeitures/expirations — — Exercised (176,350 ) 1.11 Outstanding at December 31, 2016 (1) 1,368,247 $ 2.82 (1) Expire on dates ranging from March 4, 2017 to November 15, 2021.
Summary of Information on Stock Options Outstanding	The following table summarizes information on stock options outstanding at December 31, 2016: Options Outstanding Options Exercisable Range of Exercise Prices Shares Weighted- Weighted- Shares Weighted- Life (Years) Weighted- $0.70 – $0.70 435,000 2.1 $ 0.70 435,000 2.1 $ 0.70 $1.07 – $1.07 93,535 1.0 1.07 93,535 1.0 1.07 $2.09 – $2.26 390,176 2.4 2.20 390,176 2.4 2.20 $5.05 – $5.05 285,000 4.1 5.05 247,500 4.1 5.05 $6.36 – $6.82 74,536 4.4 6.46 74,536 4.4 6.46 $7.01 – $8.51 90,000 4.7 7.48 90,000 4.7 7.48 1,368,247 2.8 $ 2.82 1,330,747 2.8 $ 2.76
Summary of Restricted Stock Activity	A summary of restricted stock activity is as follows: Shares Weighted- Unvested Balance at January 1, 2014 1,896,877 $ 7.27 Granted 623,088 16.08 Vested (996,385 ) 6.73 Forfeited (9,641 ) 10.81 Unvested Balance at December 31, 2014 1,513,939 $ 11.22 Granted 886,413 19.72 Vested (753,917 ) 10.05 Forfeited (25,709 ) 17.30 Unvested Balance at December 31, 2015 1,620,726 $ 16.32 Granted 1,687,553 11.19 Vested (846,386 ) 13.98 Forfeited (25,439 ) 16.17 Unvested Balance at December 31, 2016 2,436,454 $ 13.58

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Summary of Discretionary Contributions	A summary of the Company made discretionary contributions is as follows: Year Ended December 31, 2016 2015 2014 $ 934 $ 763 $ 588

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2016
Earnings Per Share [Abstract]
Reconciliation of Basic and Diluted Earnings Per Share	The following is a reconciliation of the basic and diluted earnings per share computation: Year Ended December 31, 2016 2015 2014 Net income $ 26,155 $ 80,052 $ 61,051 (shares in thousands) Shares of common stock and common stock equivalents: Weighted average common shares used in basic computation 134,401 137,242 131,770 Dilutive effect of common stock equivalents 1,138 1,583 6,781 Weighted average common shares used in dilutive computation 135,539 138,825 138,551 Basic earnings per share $ 0.19 $ 0.58 $ 0.46 Diluted earnings per share $ 0.19 $ 0.58 $ 0.44

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2016
Components of Current and Deferred Income Tax Expense	The components of current and deferred income tax expense included in the Consolidated Statement of Operations for years ended December 31, 2016, 2015 and 2014 as determined in accordance with ASC 740, Income Taxes Year Ended December 31, 2016 2015 2014 Current: Federal $ 14,515 $ 1,598 $ — State and local 1,425 2,431 94 Foreign 567 210 — 16,507 4,239 94 Deferred: Federal 10,629 46,784 10,739 State and local 2,296 6,233 1,664 Foreign (25 ) (123 ) — 12,900 52,894 12,403 Income tax expense from operations $ 29,407 $ 57,133 $ 12,497
Reconciliation of Statutory Federal Income Tax Rate and Company's Effective Rate	A reconciliation of the statutory federal income tax rate of 35% and the Company’s effective rate is as follows: December 31, 2016 2015 2014 Federal statutory rate 35.00 % 35.00 % 35.00 % Change in valuation allowance 8.16 % 0.90 % (27.74 %) State income tax rate, net of federal benefit 4.17 % 4.11 % 1.55 % Acquisition expense 4.06 % 0.61 % — Goodwill impairment 1.16 % — — Foreign tax differential 0.68 % 0.82 % 0.82 % Change in effective state rate 0.22 % (0.06 %) 6.86 % Other differences, net (0.52 %) 0.27 % 0.50 % Effective rate 52.93 % 41.65 % 16.99 %
Summary of Deferred Tax Asset Recorded	A summary of the components of the Company’s deferred tax assets at December 31, 2016 and 2015 are as follows: December 31, 2016 2015 Deferred tax assets: Stock-based compensation $ 5,382 $ 4,868 Accrued expenses 4,552 10,197 NOLs – Foreign 4,551 2,051 Deferred rent liability 2,024 2,116 NOLs – U.S. 1,611 1,828 Unrealized losses 101 5 Other 227 82 Deferred tax assets 18,448 21,147 Deferred tax liabilities Fixed assets 2,405 2,272 Incentive compensation 1,365 2,753 Goodwill and intangible assets 301 — Deferred tax liabilities 4,071 5,025 Total deferred tax assets less deferred tax liabilities 14,377 16,122 Less: valuation allowance (4,551 ) (2,051 ) Deferred tax assets, net $ 9,826 $ 14,071
European and Canadian Subsidiaries [Member]
Schedule of Net Operating Losses for Tax Purposes	The Company’s European and Canadian subsidiaries generated NOLs outside the U.S. The following table summarizes the activity for these NOLs for the years ended December 31, 2016, 2015 and 2014, respectively. December 31, 2016 2015 2014 Balance – Beginning of year (pre-tax) $ 10,746 $ 4,061 $ — Foreign subsidiaries tax losses 12,960 6,685 4,061 Balance – End of year (pre-tax) $ 23,706 $ 10,746 $ 4,061 Tax Rate – Blended 19.2 % 19.1 % 20.1 % Balance – End of year (tax effected) $ 4,551 $ 2,051 $ 816

Business Combinations and Acq37

Business Combinations and Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2016
Business Combinations [Abstract]
Summary of Purchase Price Allocation	The following table summarizes the purchase price allocation: Fair value acquired: Assets $ 205 Goodwill 1,799 Intangible asset 9,953 Total assets acquired $ 11,957 Less: Liabilities (132 ) Total $ 11,825

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Goodwill Activity	During the fourth quarter of 2016, the Company reorganized its reporting structure which resulted in a change in the composition of its reporting units (See Note 17). Previously, the Company had a single reporting unit. This change resulted in the reassignment of the Company’s goodwill to the reorganized reporting units as follows: Reporting Unit U.S. Business European Business (1) Total Balance at January 1, 2016 $ — $ 1,676 $ 1,676 Increases/(decreases) GreenHaven acquisition 1,799 — 1,799 Goodwill impairment – Boost — (1,676 ) (1,676 ) Balance at December 31, 2016 $ 1,799 $ — $ 1,799 (1) Europe is included within the Company’s International Business reportable segment.
Summary of Indefinite-lived Intangible Asset	Total Balance at January 1, 2016 $ — Increases – Advisory agreement (Commodities) 9,953 Balance at December 31, 2016 $ 9,953

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Reportable Segment Information	Information concerning these reportable segments are as follows: Year Ended December 31, 2016 2015 2014 Revenues (U.S. Business segment) Advisory fees $ 211,066 $ 293,788 $ 181,987 Other income 1,424 931 960 Total revenues (U.S. Business segment) $ 212,490 $ 294,719 $ 182,947 Revenues (International Business segment) Advisory fees $ 7,399 $ 4,156 $ 829 Other income (443 ) 67 (14 ) Total revenues (International Business segment) $ 6,956 $ 4,223 $ 815 Total revenues $ 219,446 $ 298,942 $ 183,762 Income/(loss) before taxes U.S. Business segment $ 74,721 $ 146,335 $ 78,631 International Business segment (19,159 ) (9,150 ) (5,083 ) Total income before taxes $ 55,562 $ 137,185 $ 73,548

Significant Accounting Polici40

Significant Accounting Policies - Schedule of Estimated Useful Lives of Related Assets (Detail)	12 Months Ended
	Dec. 31, 2016
Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	15 years

Significant Accounting Polici41

Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents maturity period, maximum		90 days
Accounting Standards Update 2015-17 [Member]
Summary Of Significant Accounting Policies [Line Items]
Reclassification from current to noncurrent assets			$ (9,279)
ASU 2016-09 [Member] | Subsequent Event [Member]
Summary Of Significant Accounting Policies [Line Items]
Income tax expense	$ 1,000

Cash and Cash Equivalents - Add

Cash and Cash Equivalents - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Cash and Cash Equivalents [Abstract]
Cash equivalents held at financial institution	$ 55,619	$ 137,481
Cash and cash equivalents held at one financial institution	$ 56,484	$ 152,103

Securities Owned and Securiti43

Securities Owned and Securities Sold, but not yet Purchased (and Fair Value Measurement) - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)Securities	Dec. 31, 2015USD ($)	Mar. 31, 2018	Apr. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liquid investments, original maturities		P90D
Number of AFS securities determined to be other than temporarily impaired | Securities		0
Acquisition payable			$ 3,942,000
Acquisition payment	$ 5,993,000	$ 6,738,000	2,185,000
Acquisition payable		$ 3,537,000
Boost [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of issued and outstanding membership interest acquired					75.00%
Boost [Member] | Scenario, Forecast [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of issued and outstanding membership interest acquired				25.00%
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition payable			3,942,000
Estimated fair value of acquisition payable			$ 9,900,000
Discounted cash flows, discount rate			27.50%
Level 3 [Member] | ETP [Member] | Europe [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Projected AUM			$ 6,000,000,000
Level 3 [Member] | ETP [Member] | Europe [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Projected AUM			$ 1,000,000,000

Securities Owned and Securiti44

Securities Owned and Securities Sold, but not yet Purchased (and Fair Value Measurement) - Schedule of Securities Owned/Sold But Not Yet Purchased (Detail) $ in Thousands	Dec. 31, 2016USD ($)
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities Owned Total	$ 58,907
Securities Sold, but not yet Purchased Total	1,248
Trading Securities [Member]
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities Owned Total	1,556
Securities Sold, but not yet Purchased Total	1,248
Available-for-sale Securities [Member]
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities Owned Total	$ 57,351

Securities Owned and Securiti45

Securities Owned and Securities Sold, but not yet Purchased (and Fair Value Measurement) - Schedule of Unrealized Gains, Losses and Fair Value of AFS Securities (Detail) - Available-for-sale Securities [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 57,615
Gross unrealized gains in other comprehensive income	0	$ 0
Gross unrealized losses in other comprehensive income	(264)
Fair value	$ 57,351

Securities Held-to-Maturity - S

Securities Held-to-Maturity - Schedule of Securities Held-to-Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity debt instruments	$ 22,496	$ 23,689
Federal Agency [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity debt instruments	$ 22,496	$ 23,689

Securities Held-to-Maturity -47

Securities Held-to-Maturity - Schedule of Unrealized Gains, Losses and Fair Value of Securities Held-to-Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Held-to-maturity cost or amortized cost	$ 22,496	$ 23,689
Held-to-maturity gross unrealized gains	13	82
Held-to-maturity gross unrealized losses	(1,353)	(609)
Held-to-maturity fair value	$ 21,156	$ 23,162

Securities Held-to-Maturity - A

Securities Held-to-Maturity - Additional Information (Detail) - Securities	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Number of securities determined to be other than temporarily impaired	0	0

Securities Held-to-Maturity -49

Securities Held-to-Maturity - Schedule of Maturity Profile of Securities Held-to-Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Held-to-maturity due within one year	$ 3,994
Held-to-maturity due one year through five years	1,023	$ 8,369
Held-to-maturity due five years through ten years	4,031	3,127
Held-to-maturity due over ten years	13,448	12,193
Held-to-maturity cost or amortized cost	$ 22,496	$ 23,689

Investment, Carried at Cost - A

Investment, Carried at Cost - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016USD ($)shares
Schedule of Cost-method Investments [Line Items]
Cost method investments	$ 20,000,000
Advisor Engine Inc. [Member]
Schedule of Cost-method Investments [Line Items]
Date of agreement	Nov. 18, 2016
Cost method investments	$ 20,000,000
Ownership interest percentage	36.00%
Impairment losses	$ 0
Advisor Engine Inc. [Member] | Series A Preferred [Member]
Schedule of Cost-method Investments [Line Items]
Number of shares purchased | shares	11,811,856
Advisor Engine Inc. [Member] | Series A Preferred [Member]
Schedule of Cost-method Investments [Line Items]
Non-cumulative dividend	6.00%

Fixed Assets - Schedule of Fixe

Fixed Assets - Schedule of Fixed Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Less accumulated depreciation and amortization	$ (3,261)	$ (1,978)
Total	11,748	11,974
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	1,739	1,258
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	2,393	2,382
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 10,877	$ 10,312

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Operating leases expenses	$ 4,293	$ 3,447	$ 3,157
Standby letter of credit	$ 1,384

Commitments and Contingencies53

Commitments and Contingencies - Schedule of Future Minimum Lease Payments (Detail) $ in Thousands	Dec. 31, 2016USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,017	$ 4,020
2,018	3,379
2,019	2,947
2,020	2,866
2021 and thereafter	24,079
Total	$ 37,291

Related Party Transactions - Su

Related Party Transactions - Summary of Accounts Receivable from Related Parties (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Accounts receivable from related parties	$ 17,349	$ 25,047
WisdomTree Trust [Member]
Related Party Transaction [Line Items]
Accounts receivable from related parties	16,506	24,560
Boost Issuer PLC And WisdomTree Issuer plc [Member]
Related Party Transaction [Line Items]
Accounts receivable from related parties	645	$ 487
WisdomTree Commodity Services LLC [Member]
Related Party Transaction [Line Items]
Accounts receivable from related parties	158
WisdomTree Asset Management Canada, Inc [Member]
Related Party Transaction [Line Items]
Accounts receivable from related parties	$ 40

Related Party Transactions - 55

Related Party Transactions - Summary of Revenues from Advisory Services Provided to Related Parties (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Revenues from advisory services	$ 218,465	$ 297,944	$ 182,816
WisdomTree Trust [Member]
Related Party Transaction [Line Items]
Revenues from advisory services	209,199	293,788	181,987
Boost Issuer PLC And WisdomTree Issuer plc [Member]
Related Party Transaction [Line Items]
Revenues from advisory services	7,251	$ 4,156	$ 829
WisdomTree Commodity Services LLC [Member]
Related Party Transaction [Line Items]
Revenues from advisory services	1,867
WisdomTree Asset Management Canada, Inc [Member]
Related Party Transaction [Line Items]
Revenues from advisory services	$ 148

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - WisdomTree ETF [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)
Related Party Transaction [Line Items]
Investment	$ 1,300
Losses on investment	$ 12

Stock-Based Awards - Additional

Stock-Based Awards - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 20, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option issuance period		10 years
Option vested period		1 year
Option issued period		Options may be issued for terms of ten years
Shares of common stock authorized to issue under equity award plan	10,000,000
Description of new equity award plan		On June 20, 2016, the Company's stockholders approved a new equity award plan under which the Company can issue up to 10,000,000 shares of common stock (less one share for every share granted under prior plans since March 31, 2016 and inclusive of shares available under the prior plans as of March 31, 2016) in the form of stock options and other stock-based awards.
Stock-based compensation expense		$ 14,892	$ 10,900	$ 8,137
Tax benefit recognized in the Consolidated Statements of Operations		5,324	4,149	2,973
Actual tax benefit realized for the tax deductions for share-based compensation		12,877	67,532	23,309
Total intrinsic value of options exercised		1,794	76,329	36,226
Cash received from option exercise		$ 195	$ 4,520	$ 1,544
Outstanding options		1,368,247	1,544,597	5,330,070	7,844,691
Options exercisable		1,330,747
Options remaining average contractual term		2 years 9 months 18 days
Option exercisable remaining average contractual term		2 years 9 months 18 days
Options intrinsic value		$ 11,386
Option exercisable intrinsic value		$ 11,158
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vested period		3 years

Stock-Based Awards - Summary of

Stock-Based Awards - Summary of Unrecognized Stock-Based Compensation Expense and Average Remaining Vesting Period (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)
Employees and Directors Option Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Stock-Based Compensation	$ 8
Average Remaining Vesting Period	26 days
Employees and Directors Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Stock-Based Compensation	$ 20,714
Average Remaining Vesting Period	1 year 9 months 15 days

Stock-Based Awards - Summary 59

Stock-Based Awards - Summary of Options and Restricted Stock Activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options, beginning balance	1,544,597	5,330,070	7,844,691
Options, Granted	0	0	0
Options, Forfeitures/expirations	0	0	0
Options, Exercised	(176,350)	(3,785,473)	(2,514,621)
Options, ending balance	1,368,247	1,544,597	5,330,070
Weighted Average Exercise Price of Options, beginning balance	$ 2.62	$ 1.61	$ 1.29
Weighted Average Exercise Price of Options, Granted	0	0	0
Weighted Average Exercise Price of Options, Forfeitures or expirations	0	0	0
Weighted Average Exercise Price of Options, Exercised	1.11	1.19	0.61
Weighted Average Exercise Price of Options, ending balance	$ 2.82	$ 2.62	$ 1.61

Stock-Based Awards - Summary 60

Stock-Based Awards - Summary of Options and Restricted Stock Activity (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Expire start date on options	Mar. 4, 2017
Expire end date on options	Nov. 15, 2021

Stock-Based Awards - Summary 61

Stock-Based Awards - Summary of Information on Stock Options Outstanding (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Options Outstanding, Shares	1,368,247	1,544,597	5,330,070	7,844,691
Options Outstanding, Weighted Average Remaining Life	2 years 9 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 2.82	$ 2.62	$ 1.61	$ 1.29
Options Exercisable, Shares	1,330,747
Options Exercisable, Weighted Average Remaining Contractual Life	2 years 9 months 18 days
Options Exercisable, Weighted Average Exercise Price	$ 2.76
$0.70 - $0.70 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Range of Exercise Prices, low	0.70
Range of Exercise Prices, high	$ 0.70
Options Outstanding, Shares	435,000
Options Outstanding, Weighted Average Remaining Life	2 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price	$ 0.70
Options Exercisable, Shares	435,000
Options Exercisable, Weighted Average Remaining Contractual Life	2 years 1 month 6 days
Options Exercisable, Weighted Average Exercise Price	$ 0.70
$1.07 - $1.07 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Range of Exercise Prices, low	1.07
Range of Exercise Prices, high	$ 1.07
Options Outstanding, Shares	93,535
Options Outstanding, Weighted Average Remaining Life	1 year
Options Outstanding, Weighted Average Exercise Price	$ 1.07
Options Exercisable, Shares	93,535
Options Exercisable, Weighted Average Remaining Contractual Life	1 year
Options Exercisable, Weighted Average Exercise Price	$ 1.07
$2.09 - $2.26 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Range of Exercise Prices, low	2.09
Range of Exercise Prices, high	$ 2.26
Options Outstanding, Shares	390,176
Options Outstanding, Weighted Average Remaining Life	2 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 2.20
Options Exercisable, Shares	390,176
Options Exercisable, Weighted Average Remaining Contractual Life	2 years 4 months 24 days
Options Exercisable, Weighted Average Exercise Price	$ 2.20
$5.05 - $5.05 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Range of Exercise Prices, low	5.05
Range of Exercise Prices, high	$ 5.05
Options Outstanding, Shares	285,000
Options Outstanding, Weighted Average Remaining Life	4 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price	$ 5.05
Options Exercisable, Shares	247,500
Options Exercisable, Weighted Average Remaining Contractual Life	4 years 1 month 6 days
Options Exercisable, Weighted Average Exercise Price	$ 5.05
$6.36 - $6.82 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Range of Exercise Prices, low	6.36
Range of Exercise Prices, high	$ 6.82
Options Outstanding, Shares	74,536
Options Outstanding, Weighted Average Remaining Life	4 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 6.46
Options Exercisable, Shares	74,536
Options Exercisable, Weighted Average Remaining Contractual Life	4 years 4 months 24 days
Options Exercisable, Weighted Average Exercise Price	$ 6.46
$7.01 - $8.51 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Range of Exercise Prices, low	7.01
Range of Exercise Prices, high	$ 8.51
Options Outstanding, Shares	90,000
Options Outstanding, Weighted Average Remaining Life	4 years 8 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 7.48
Options Exercisable, Shares	90,000
Options Exercisable, Weighted Average Remaining Contractual Life	4 years 8 months 12 days
Options Exercisable, Weighted Average Exercise Price	$ 7.48

Stock-Based Awards - Summary 62

Stock-Based Awards - Summary of Restricted Stock Activity (Detail) - Restricted Stock Units (RSUs) [Member] - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested Beginning Balance, Shares	1,620,726	1,513,939	1,896,877
Granted, Shares	1,687,553	886,413	623,088
Vested, Shares	(846,386)	(753,917)	(996,385)
Forfeited, Shares	(25,439)	(25,709)	(9,641)
Unvested Ending Balance, Shares	2,436,454	1,620,726	1,513,939
Weighted-Average Grant Date Fair Value, Unvested, Beginning Balance	$ 16.32	$ 11.22	$ 7.27
Weighted- Average Grant Date Fair Value, Granted	11.19	19.72	16.08
Weighted- Average Grant Date Fair Value, Vested	13.98	10.05	6.73
Weighted- Average Grant Date Fair Value, Forfeited	16.17	17.30	10.81
Unvested Weighted-Average Grant Date Fair Value, Ending Balance	$ 13.58	$ 16.32	$ 11.22

Employee Benefits Plans - Summa

Employee Benefits Plans - Summary of Discretionary Contributions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Discretionary contributions	$ 934	$ 763	$ 588

Earnings Per Share - Reconcilia

Earnings Per Share - Reconciliation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Net income	$ 26,155	$ 80,052	$ 61,051
Shares of common stock and common stock equivalents:
Weighted average common shares used in basic computation	134,401	137,242	131,770
Dilutive effect of common stock equivalents	1,138	1,583	6,781
Weighted average common shares used in dilutive computation	135,539	138,825	138,551
Basic earnings per share	$ 0.19	$ 0.58	$ 0.46
Diluted earnings per share	$ 0.19	$ 0.58	$ 0.44

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Anti-dilutive common stock equivalents excluded from calculation of diluted earnings per share	996,000	0	1,247,000

Income Taxes - Components of Cu

Income Taxes - Components of Current and Deferred Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 14,515	$ 1,598
State and local	1,425	2,431	$ 94
Foreign	567	210
Total current	16,507	4,239	94
Deferred:
Federal	10,629	46,784	10,739
State and local	2,296	6,233	1,664
Foreign	(25)	(123)
Total deferred	12,900	52,894	12,403
Income tax expense from operations	$ 29,407	$ 57,133	$ 12,497

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
Pre-tax federal net operating losses	$ 4,195,000
Pre-tax federal net operating losses expiration date	2,024
Unrecognized tax benefits	$ 0	$ 0
Income tax examination description	Tax returns filed with each jurisdiction generally remain open to examination under the normal three-year statute of limitation. As of December 31, 2016, with few exceptions, the Company was no longer subject to income tax examinations by any taxing authority for years before 2013.

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Statutory Federal Income Tax Rate and Company's Effective Rate (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
Change in valuation allowance	8.16%	0.90%	(27.74%)
State income tax rate, net of federal benefit	4.17%	4.11%	1.55%
Acquisition expense	4.06%	0.61%
Goodwill impairment	1.16%
Foreign tax differential	0.68%	0.82%	0.82%
Change in effective state rate	0.22%	(0.06%)	6.86%
Other differences, net	(0.52%)	0.27%	0.50%
Effective rate	52.93%	41.65%	16.99%

Income Taxes - Schedule of Net

Income Taxes - Schedule of Net Operating Losses for Tax Purposes - Non-U.S. (Detail) - European and Canadian Subsidiaries [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Balance-Beginning of year (pre-tax)	$ 10,746	$ 4,061
Foreign subsidiaries tax losses	12,960	6,685	$ 4,061
Balance - End of year (pre-tax)	$ 23,706	$ 10,746	$ 4,061
Tax Rate - Blended	19.20%	19.10%	20.10%
Balance - End of year (tax effected)	$ 4,551	$ 2,051	$ 816

Income Taxes - Summary of Defer

Income Taxes - Summary of Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Stock-based compensation	$ 5,382	$ 4,868
Accrued expenses	4,552	10,197
NOLs - Foreign	4,551	2,051
Deferred rent liability	2,024	2,116
NOLs - U.S.	1,611	1,828
Unrealized losses	101	5
Other	227	82
Deferred tax assets	18,448	21,147
Deferred tax liabilities
Fixed assets	2,405	2,272
Incentive compensation	1,365	2,753
Goodwill and intangible assets	301
Deferred tax liabilities	4,071	5,025
Total deferred tax assets less deferred tax liabilities	14,377	16,122
Less: valuation allowance	(4,551)	(2,051)
Deferred tax assets, net	$ 9,826	$ 14,071

Shares Repurchased - Additional

Shares Repurchased - Additional Information (Detail) - USD ($)	Apr. 27, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Oct. 29, 2014
Class of Stock [Line Items]
Repurchased common stock, value		$ 39,379,000	$ 24,116,000	$ 6,531,000
Three-Year Share Repurchase Program [Member]
Class of Stock [Line Items]
Common stock purchase authorized amount					$ 100,000,000
Share repurchase program, increase in authorized amount	$ 60,000,000
Share repurchase program, extended term date	Apr. 27, 2019
Repurchased common stock, shares		3,778,932	1,190,356	415,834
Repurchased common stock, value		$ 39,379,000	$ 24,116,000	$ 6,531,000
Dollar amount remaining for future share repurchases		$ 96,505,000

Business Combinations and Acq72

Business Combinations and Acquisitions - Additional Information (Detail) - USD ($)	Jan. 01, 2016	Apr. 30, 2014	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Business acquisition, goodwill				$ 1,799,000	$ 1,676,000
Acquisition payment			$ 5,993,000	6,738,000	2,185,000
Amounts payable in acquisition				3,537,000	3,942,000
Boost [Member]
Business Acquisition [Line Items]
Business acquisition, goodwill				$ 1,676,000
Percentage of issued and outstanding membership interest acquired		75.00%
Business acquisition consideration transferred		$ 0
Non-controlling interest				25.00%
Compensation expense					997,000
Interest expense					$ 1,188,000
GreenHaven Commodity Services, LLC [Member]
Business Acquisition [Line Items]
Business acquisition, cash paid	$ 11,825,000
Business acquisition, recognized an intangible asset related to customary advisory agreement with Commodities ETF	9,953,000
Business acquisition, goodwill	$ 1,799,000
Estimate of Fair Value Measurement [Member] | Boost [Member]
Business Acquisition [Line Items]
Fair value of net assets acquired				$ 81,000
Boost Shareholders [Member]
Business Acquisition [Line Items]
Guaranteed minimum payment				$ 1,757,000

Business Combinations and Acq73

Business Combinations and Acquisitions- Summary of Purchase Price Allocation (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 01, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill	$ 1,799		$ 1,676
GreenHaven Commodity Services, LLC [Member]
Business Acquisition [Line Items]
Assets		$ 205
Goodwill		1,799
Intangible asset		9,953
Total assets acquired		11,957
Less: Liabilities		(132)
Total		$ 11,825

Goodwill and Intangible Asset74

Goodwill and Intangible Assets - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Dec. 31, 2016USD ($)Segment	Dec. 31, 2016USD ($)
Indefinite-lived Intangible Assets [Line Items]
Number of reportable segments | Segment	1
Goodwill impairment	$ 0	$ 1,676,000
Intangible asset related to its customary advisory agreement	9,953,000	9,953,000
GreenHaven Commodity Services, LLC [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible asset related to its customary advisory agreement	$ 9,953,000	$ 9,953,000

Goodwill and Intangible Asset75

Goodwill and Intangible Assets - Summary of Goodwill Activity (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016
Goodwill [Line Items]
Beginning balance		$ 1,676,000
Increases/(decreases)		0
GreenHaven acquisition		1,799,000
Goodwill impairment - Boost	$ 0	(1,676,000)
Ending balance	1,799,000	1,799,000
Reportable Subsegments [Member] | U.S. Business segment [Member]
Goodwill [Line Items]
Increases/(decreases)		0
GreenHaven acquisition		1,799,000
Ending balance	$ 1,799,000	1,799,000
Reportable Subsegments [Member] | International Business Segment [Member]
Goodwill [Line Items]
Beginning balance		1,676,000
Increases/(decreases)		0
Goodwill impairment - Boost		$ (1,676,000)

Goodwill and Intangible Asset76

Goodwill and Intangible Assets - Summary of Indefinite-lived Intangible Asset (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)
Indefinite-lived Intangible Assets [Line Items]
Ending balance	$ 9,953
GreenHaven Commodity Services, LLC [Member]
Indefinite-lived Intangible Assets [Line Items]
Increases - Advisory agreement (Commodities)	9,953
Ending balance	$ 9,953

Segment Reporting - Reportable

Segment Reporting - Reportable Segment Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues
Advisory fees	$ 218,465	$ 297,944	$ 182,816
Other income	981	998	946
Total revenues	219,446	298,942	183,762
Income/(loss) before taxes
Total income before taxes	55,562	137,185	73,548
U.S. Business segment [Member]
Revenues
Advisory fees	211,066	293,788	181,987
Other income	1,424	931	960
Total revenues	212,490	294,719	182,947
Income/(loss) before taxes
Total income before taxes	74,721	146,335	78,631
International Business Segment [Member]
Revenues
Advisory fees	7,399	4,156	829
Other income	(443)	67	(14)
Total revenues	6,956	4,223	815
Income/(loss) before taxes
Total income before taxes	$ (19,159)	$ (9,150)	$ (5,083)