Receivables from and payables to brokers, dealers and clearing organizations (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Brokers and Dealers [Abstract]
Receivable from Broker-dealers	$ 547,293	$ 692,581
Securities Failed-to-Deliver	33,373	72,918
Receivable from Clearing organizations	22,683	15,319
Stock borrow interest receivable	14,019	5,295
Receivable from brokers, dealers and clearing organizations	617,368	786,113
Payable to Broker-Dealers	166,728	159,443
Securities Failed-to-Receive	52,482	28,826
Payable to clearing organizations	9,648	36,338
Stock loan interest payable	12,154	4,124
Payables to brokers, dealers and clearing organizations	$ 241,012	$ 228,731

Stock borrow interest receivable

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- Definition

Stock loan interest payable

+ References

No definition available.

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- References

No definition available.

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- Definition

Amount receivable from correspondent broker-dealer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
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- Definition

Amount payable to correspondent broker-dealer.

+ References

No definition available.

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- Definition

Amount of other payables due to broker-dealers or clearing organizations.

+ References

No definition available.

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- Definition

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.

+ References

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- Definition

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.

+ References

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- 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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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- Definition

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.

+ References

No definition available.

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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.

+ References

No definition available.

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