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Receivable from and Payable to Brokers, Dealers and Clearing Organizations - Receivable from and Payable to Brokers, Dealers and Clearing Organizations (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Receivable from brokers, dealers and clearing organizations consist of:
Securities borrowed	$ 267,643	$ 274,127
Receivable from brokers	52,616	23,384
Securities failed to deliver	24,476	9,628
Clearing organizations	21,705	26,446
Omnibus accounts	0	18,086
Other	14,503	13,202
Receivables from broker, dealers and clearing organizations	380,943	364,873
Payable to brokers, dealers and clearing organizations consist of:
Securities loaned	164,095	211,621
Securities failed to receive	32,297	5,346
Clearing organizations and other	8,558	6,348
Payable to brokers, dealers and clearing organizations	$ 204,950	$ 223,315

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Omnibus accounts.

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- Definition

This is the amount of cash advanced as security in return for borrowing securities from another party.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 6

-Article 9

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- Definition

The amount of cash received as security in return for loaning securities to another party.

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-Number 210

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Amount receivable from correspondent broker-dealer.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

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Amount of other payables due to broker-dealer.

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Amount of other receivables due from broker-dealer.

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Amount payable to broker-dealers and clearing organizations, including, but not limited to, securities failed-to-receive, certain deposits received for securities loaned, open transactions, and floor-brokerage payables.

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Amount receivable from broker-dealers and clearing organizations, including, but not limited to, securities failed-to-deliver, certain deposits for securities borrowed, open transactions, good faith and margin deposits, commissions and floor brokerage receivables.

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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.

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Amount receivable as the result of a fail-to-deliver. A fail-to-deliver is a securities sale to another broker-dealer that has not been delivered to buying broker-dealer by the close of business on the settlement date.

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Amount payable as the result of fail-to-receive. A fail-to-receive is a securities purchase from another broker-dealer not received from the selling broker-dealer by the close of business on the settlement date.

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