Off-Balance-Sheet Risk and Concentration of Credit Risk (Detail) $ in Thousands |
9 Months Ended | ||
|---|---|---|---|
|
Sep. 30, 2018
USD ($)
clearing_broker
|
Jan. 01, 2018
USD ($)
|
Dec. 31, 2017
USD ($)
|
|
| Risks and Uncertainties [Abstract] | |||
| Number of clearing brokers | clearing_broker | 2 | ||
| Receivables from clearing brokers | $ | $ 26,650 | $ 48,543 | $ 48,543 |
| X | ||||||||||
- Definition Number of Clearing Brokers No definition available.
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| X | ||||||||||
- Definition Amount of right to receive cash and securities on deposit with clearing organizations. Clearing organizations perform post trade processing and trade comparisons among numerous broker-dealers and act as settlement agents between buying and selling broker-dealers. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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