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Summary of Significant Accounting Policies (Details) | 3 Months Ended
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Mar. 31, 2018
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%
Furniture, fixtures and equipment | Minimum |
Securities Borrowed and Securities Loaned |
Estimated useful lives | 3 years
Furniture, fixtures and equipment | Maximum |
Securities Borrowed and Securities Loaned |
Estimated useful lives | 7 years
Capitalized software | Minimum |
Securities Borrowed and Securities Loaned |
Estimated useful lives | 1 year 6 months
Capitalized software | Maximum |
Securities Borrowed and Securities Loaned |
Estimated useful lives | 2 years 6 months

X
- Definition 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. + References No definition available. + Details
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X
- Definition Represents the minimum initial collateral advanced or received expressed as a percentage of fair value of the underlying securities borrowed or loaned. + References No definition available. + Details
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- Details
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- Details
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