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Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Amounts Payable To Brokers, Dealers, And Clearing Organizations) (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
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Due To And From Broker Dealers And Clearing Organizations [Abstract] |  |
Deposits received from securities loaned | $ 429,372 | $ 219,782
Securities failed to receive | 56,261 | 29,297
Payable to clearing organizations | 18,962 | 27,223
Payables to broker, dealers and clearing organizations, Total | $ 504,595 | $ 276,302

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- Definition Amount payable to broker-dealers or clearing organizations for executing or clearing trades or orders. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 The amount of cash received as security in return for loaning securities to another party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(11)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 + Details
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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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 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. + Details
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