Goodwill and Identifiable Intangible Assets	9 Months Ended
Goodwill and Identifiable Intangible Assets	Sep. 30, 2014
Goodwill and Identifiable Intangible Assets [Abstract]
Goodwill and Identifiable Intangible Assets	I. Goodwill and Identifiable Intangible Assets At September 30, 2014, $3.5 million of goodwill is reflected within other assets on the condensed consolidated statements of financial condition with $3.3 million related to a 94%-owned subsidiary, Gabelli Securities, Inc. and $0.2 million related to G.distributors, LLC. The Company assesses the recoverability of goodwill at least annually, or more often should events warrant, using a qualitative assessment of whether it is more likely than not that an impairment has occurred to determine if a quantitative analysis is required. There were no indicators of impairment for the three months ended September 30, 2014 or September 30, 2013, and as such there was no impairment analysis performed or charge recorded. As a result of becoming the advisor to the Gabelli Enterprise Mergers and Acquisitions Fund and the associated consideration paid, the Company maintains an identifiable intangible asset of $1.9 million within other assets on the condensed consolidated statements of financial condition at September 30, 2014, December 31, 2013 and September 30, 2013. The investment advisory agreement is subject to annual renewal by the fund's Board of Directors, which the Company expects to be renewed, and the Company does not expect to incur additional expense as a result, which is consistent with other investment advisory agreements entered into by the Company. The advisory contract is next up for renewal in February 2015. The Company assesses the recoverability of this intangible asset at least annually, or more often should events warrant. There were no indicators of impairment for the three months ended September 30, 2014 or September 30, 2013, and as such there was no impairment analysis performed or charge recorded.

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

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