Amount of expense for amortization of capitalized computer software costs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Represents the minimum initial collateral advanced or received expressed as a percentage of fair value of the underlying securities borrowed or loaned.

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Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Securities Borrowed and Securities Loaned
Minimum initial collateral advanced or received expressed as a percentage of fair value of the underlying securities borrowed or loaned			102.00%
Class B interests \| East MIP
Property and Equipment and Capitalized Software
Amortization expense related to share based compensation	$ 20	$ 100	$ 60	$ 700
Furniture, fixtures and equipment \| Minimum
Property and Equipment and Capitalized Software
Estimated useful lives			3 years
Furniture, fixtures and equipment \| Maximum
Property and Equipment and Capitalized Software
Estimated useful lives			7 years
Capitalized software \| Minimum
Property and Equipment and Capitalized Software
Estimated useful lives			1 year 4 months 24 days
Capitalized software \| Maximum
Property and Equipment and Capitalized Software
Estimated useful lives			3 years