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Collateralized Transactions (Tables) | 12 Months Ended
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Dec. 31, 2017
Brokers and Dealers [Abstract] |
Transfer of Certain Financial Assets Accounted for as Secured Borrowings | The following table presents a disaggregation of the gross obligation by the class of collateral pledged and the remaining contractual maturity of the repurchase agreements and securities loaned transactions as of December 31, 2017:
(Expressed in thousands) |
| Overnight and Open
Repurchase agreements: |
U.S. Government and Agency securities | $ | 786,532 |
Securities loaned: |
Equity securities | 180,270 |
Gross amount of recognized liabilities for repurchase agreements and securities loaned | $ | 966,802 |
Schedule of Gross Amounts and Offsetting Amounts of Reverse Repurchase Agreements, Repurchase Agreements, Securities Borrowed and Securities Lending Transactions | The following tables present the gross amounts and the offsetting amounts of reverse repurchase agreements, repurchase agreements, securities borrowed and securities loaned transactions as of December 31, 2017 and 2016:
As of December 31, 2017
(Expressed in thousands) |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  | Gross Amounts Not Offset on the Balance Sheet |  |
| Gross Amounts of Recognized Assets |  | Gross Amounts Offset on the Balance Sheet |  | Net Amounts of Assets Presented on the Balance Sheet |  | Financial Instruments |  | Cash Collateral Received |  | Net Amount
Reverse repurchase agreements | $ | 200,712 |  |  | $ | (200,054 | ) |  | $ | 658 |  |  | $ | — |  |  | $ | — |  |  | $ | 658 |
Securities borrowed (1) | 132,368 |  |  | — |  |  | 132,368 |  |  | (128,575 | ) |  | — |  |  | 3,793 |
Total | $ | 333,080 |  |  | $ | (200,054 | ) |  | $ | 133,026 |  |  | $ | (128,575 | ) |  | $ | — |  |  | $ | 4,451 |
(1) | Included in receivable from brokers, dealers and clearing organizations on the consolidated balance sheet.
|  |  |  |  |  |  | Gross Amounts Not Offset on the Balance Sheet |  |
| Gross Amounts of Recognized Liabilities |  | Gross Amounts Offset on the Balance Sheet |  | Net Amounts of Liabilities Presented on the Balance Sheet |  | Financial Instruments |  | Cash Collateral Pledged |  | Net Amount
Repurchase agreements | $ | 786,532 |  |  | $ | (200,054 | ) |  | $ | 586,478 |  |  | $ | (585,289 | ) |  | $ | — |  |  | $ | 1,189 |
Securities loaned (2) | 180,270 |  |  | — |  |  | 180,270 |  |  | (170,176 | ) |  | — |  |  | 10,094 |
Total | $ | 966,802 |  |  | $ | (200,054 | ) |  | $ | 766,748 |  |  | $ | (755,465 | ) |  | $ | — |  |  | $ | 11,283 |
(2) | Included in payable to brokers, dealers and clearing organizations on the consolidated balance sheet.
As of December 31, 2016
(Expressed in thousands) |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  | Gross Amounts Not Offset on the Balance Sheet |  |
| Gross Amounts of Recognized Assets |  | Gross Amounts Offset on the Balance Sheet |  | Net Amounts of Assets Presented on the Balance Sheet |  | Financial Instruments |  | Cash Collateral Received |  | Net Amount
Reverse repurchase agreements | $ | 24,006 |  |  | $ | — |  |  | $ | 24,006 |  |  | $ | (23,972 | ) |  | $ | — |  |  | $ | 34 |
Securities borrowed (1) | 154,090 |  |  | — |  |  | 154,090 |  |  | (150,510 | ) |  | — |  |  | 3,580 |
Total | $ | 178,096 |  |  | $ | — |  |  | $ | 178,096 |  |  | $ | (174,482 | ) |  | $ | — |  |  | $ | 3,614 |
(1) | Included in receivable from brokers, dealers and clearing organizations on the consolidated balance sheet.
|  |  |  |  |  |  | Gross Amounts Not Offset on the Balance Sheet |  |
| Gross Amounts of Recognized Liabilities |  | Gross Amounts Offset on the Balance Sheet |  | Net Amounts of Liabilities Presented on the Balance Sheet |  | Financial Instruments |  | Cash Collateral Pledged |  | Net Amount
Repurchase agreements | $ | 378,084 |  |  | $ | — |  |  | $ | 378,084 |  |  | $ | (376,273 | ) |  | $ | — |  |  | $ | 1,811 |
Securities loaned (2) | 179,875 |  |  | — |  |  | 179,875 |  |  | (171,991 | ) |  | — |  |  | 7,884 |
Total | $ | 557,959 |  |  | $ | — |  |  | $ | 557,959 |  |  | $ | (548,264 | ) |  | $ | — |  |  | $ | 9,695 |
(2) | Included in payable to brokers, dealers and clearing organizations on the consolidated balance sheet.

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- Definition Offsetting securities purchased under agreements to resell securities borrowed securities sold under agreements to repurchase securities loaned. + References No definition available. + Details
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- Definition Tabular disclosure of the nature and risks of short-term collateralized financing obtained through repurchase agreements, securities lending transactions and repurchase-to-maturity transactions, accounted for as secured borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=64858031&loc=SL34722452-111729 + Details
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