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Receivables from and Payables to Broker-Dealers, Clearing Organizations, Customers and Related Broker-Dealers (Detail) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
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Receivables from broker-dealers, clearing organizations, customers and related broker-dealers: |  |
Contract values of fails to deliver | $ 1,285,423 | $ 158,976
Receivables from clearing organizations | 136,547 | 126,879
Other receivables from broker-dealers and customers | 17,211 | 14,237
Net pending trades | 10,909 | 2,999
Open derivative contracts | 5,243 | 931
Total | 1,455,333 | 304,022
Payables to broker-dealers, clearing organizations, customers and related broker-dealers: |  |
Contract values of fails to receive | 1,142,236 | 154,050
Payables to clearing organizations | 133,892 | 12,373
Other payables to broker-dealers and customers | 23,194 | 11,833
Open derivative contracts | 6,421 | 1,460
Total | 1,305,743 | $ 179,716
Disposal Group, Held-for-sale, Not Discontinued Operations |  |
Receivables from broker-dealers, clearing organizations, customers and related broker-dealers: |  |
Open derivative contracts | 310 |
Payables to broker-dealers, clearing organizations, customers and related broker-dealers: |  |
Open derivative contracts | $ 7 |

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- Definition Amount payable to other broker-dealer and clearing organization, including, but not limited to, security failed-to-receive, deposit received for security loaned, open transaction, and floor-brokerage payable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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- Definition Amount payable to broker-dealers or clearing organizations for executing or clearing trades or orders. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41256-110953 + Details
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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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=35710130&loc=d3e41645-110958 + Details
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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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 310 -URI http://asc.fasb.org/subtopic&trid=2176284 + Details
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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. + Details
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