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Collateralized Transactions (Tables) | 12 Months Ended
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Dec. 31, 2015
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, 2015:
(Expressed in thousands) |  |  |  |  |
| Overnight and Open |  | Up to 30 Days |  | Total
Repurchase agreements: |  |  |  |  |
U.S. Treasury and Agency securities | $ | 726,988 |  |  | $ | — |  |  | $ | 726,988 |
Securities loaned: |  |  |  |  |
Equity securities | 130,658 |  |  | — |  |  | 130,658 |
Gross amount of recognized liabilities for repurchase agreements and securities loaned | $ | 857,646 |  |  | $ | — |  |  | $ | 857,646 |
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, 2015 and 2014:
As of December 31, 2015
(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 | $ | 282,042 |  |  | $ | (75,543 | ) |  | $ | 206,499 |  |  | $ | (203,266 | ) |  | $ | — |  |  | $ | 3,233 |
Securities borrowed (1) | 224,672 |  |  | — |  |  | 224,672 |  |  | (219,099 | ) |  | — |  |  | 5,573 |
Total | $ | 506,714 |  |  | $ | (75,543 | ) |  | $ | 431,171 |  |  | $ | (422,365 | ) |  | $ | — |  |  | $ | 8,806 |
(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 | $ | 726,988 |  |  | $ | (75,543 | ) |  | $ | 651,445 |  |  | $ | (645,498 | ) |  | $ | — |  |  | $ | 5,947 |
Securities loaned (2) | 130,658 |  |  | — |  |  | 130,658 |  |  | (122,650 | ) |  | — |  |  | 8,008 |
Total | $ | 857,646 |  |  | $ | (75,543 | ) |  | $ | 782,103 |  |  | $ | (768,148 | ) |  | $ | — |  |  | $ | 13,955 |
(2) | Included in payable to brokers, dealers and clearing organizations on the consolidated balance sheet.
As of December 31, 2014
(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 | $ | 314,266 |  |  | $ | (62,660 | ) |  | $ | 251,606 |  |  | $ | (250,000 | ) |  | $ | — |  |  | $ | 1,606 |
Securities borrowed (1) | 242,172 |  |  | — |  |  | 242,172 |  |  | (234,376 | ) |  | — |  |  | 7,796 |
Total | $ | 556,438 |  |  | $ | (62,660 | ) |  | $ | 493,778 |  |  | $ | (484,376 | ) |  | $ | — |  |  | $ | 9,402 |
(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 | $ | 750,100 |  |  | $ | (62,660 | ) |  | $ | 687,440 |  |  | $ | (686,119 | ) |  | $ | — |  |  | $ | 1,321 |
Securities loaned (2) | 137,892 |  |  | — |  |  | 137,892 |  |  | (132,258 | ) |  | — |  |  | 5,634 |
Total | $ | 887,992 |  |  | $ | (62,660 | ) |  | $ | 825,332 |  |  | $ | (818,377 | ) |  | $ | — |  |  | $ | 6,955 |
(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=55761124&loc=SL34722452-111729 + Details
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