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Financial Instruments Owned and Pledged as Collateral at Fair Value, Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase | 12 Months Ended
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Dec. 31, 2020
Brokers and Dealers [Abstract] |
Financial Instruments Owned and Pledged as Collateral at Fair Value, Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase | Financial Instruments Owned and Pledged as Collateral at Fair Value, Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase The Company's ECB business was sold in December 2020. See Note 5 for further information. Prior to its sale, the Company, through its ECB business, entered into repurchase agreements with clients seeking overnight money market returns whereby ECB transferred to the clients Mexican government securities in exchange for cash and concurrently agreed to repurchase the securities at a future date for an amount equal to the cash exchanged plus a stipulated premium or interest factor. ECB deployed the cash received from, and acquired the securities deliverable to, clients under these repurchase arrangements by purchasing securities in the open market, which the Company reflected as Financial Instruments Owned and Pledged as Collateral at Fair Value on the Consolidated Statements of Financial Condition, or by entering into reverse repurchase agreements with unrelated third parties. The Company accounted for these repurchase and reverse repurchase agreements as collateralized financing transactions, which were carried at their contract amounts, which approximated fair value given that the contracts matured the following business day. The Company recorded a liability on its Consolidated Statements of Financial Condition in relation to repurchase transactions executed with clients as Securities Sold Under Agreements to Repurchase. The Company recorded as assets on its Consolidated Statements of Financial Condition, Financial Instruments Owned and Pledged as Collateral at Fair Value (where the Company had acquired the securities deliverable to clients under these repurchase arrangements by purchasing securities in the open market) and Securities Purchased Under Agreements to Resell (where the Company had acquired the securities deliverable to clients under these repurchase agreements by entering into reverse repurchase agreements with unrelated third parties). These Mexican government securities were pledged as collateral against repurchase agreements. Generally, collateral was posted equal to the contract value at inception and was subject to market changes. These repurchase agreements were primarily with institutional customer accounts managed by ECB and permitted the counterparty to pledge the securities. There were no remaining assets or liabilities related to collateralized financing activities as of December 31, 2020. See Note 5 for further information. As of December 31, 2019, a summary of the Company's assets, liabilities and collateral received or pledged related to these transactions is as follows:
|  |  | December 31, 2019
|  |  |  |  | Asset (Liability) Balance |  | Market Value of Collateral Received or (Pledged)
Assets |  |  |  |  |  |  |
Financial Instruments Owned and Pledged as Collateral at Fair Value |  |  |  |  | $ | 12,431 |  |  |
Securities Purchased Under Agreements to Resell |  |  |  |  | 13,566 |  |  | $ | 13,572 |
Total Assets |  |  |  |  | $ | 25,997 |  |  |
Liabilities |  |  |  |  |  |  |
Securities Sold Under Agreements to Repurchase |  |  |  |  | $ | (26,000) |  |  | $ | (25,992) |

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- Definition The entire disclosure for repurchase agreements (also known as repos), resale agreements (also known as reverse repurchase agreements or reverse repos), securities borrowed transactions, and securities loaned transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -URI http://asc.fasb.org/topic&trid=2197590 + Details
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