Goodwill and Intangibles	9 Months Ended
Goodwill and Intangibles	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangibles	Goodwill In accordance with US GAAP, the Company tests goodwill for impairment on an annual basis or at an interim period if events or changed circumstances would more likely than not reduce the fair value of a reporting unit below its carrying amount. Under US GAAP, the Company first assesses the qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amounts as a basis for determining if it is necessary to perform the two-step approach. Periodically estimating the fair value of a reporting unit requires significant judgment and often involves the use of significant estimates and assumptions. These estimates and assumptions could have a significant effect on whether or not an impairment charge is recorded and the magnitude of such a charge. In connection with the CRT transaction (See Note 2), in May 2016, the Company recognized goodwill of $3.5 million and intangible assets (including customer relationships, trade name, intellectual property and non-compete arrangements) with an estimated fair value of $5.1 million which are included within intangible assets, net in the condensed consolidation statements of financial condition with the expected useful lives ranging from 1 to 9 years with a weighted average useful life of 8.1 years. Amortization expense related to intangibles from the CRT acquisition for the three and nine months ended September 30, 2016 is $0.2 million and $0.4 million respectively. Goodwill, which primarily relates to expected synergies from combining operations, is fully deductible for tax purposes and has been assigned to the broker-dealer segment of the Company. On September 23, 2016, the Company and the portfolio managers of RASL completed the sale of their respective ownership interests in RASL, an investment advisor. In contemplation with the sale transaction, the Company allocated $1.2 million of goodwill to the RASL disposal group (See Note 2). The Company performed an interim goodwill impairment analysis at the time of the sale transaction and no impairment charges for goodwill were recognized during the three and nine months ended September 30, 2016 and 2015, respectively.

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.