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Revenues from Contracts with Customers (Tables) | 6 Months Ended
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Jun. 30, 2020
Revenue From Contract With Customer [Abstract] |
Summary of Revenues from Contracts with Customers and Other Sources of Revenues | The following table presents the Company’s total revenues separated between revenues from contracts with customers and other sources of revenues (in thousands):
| Three Months Ended June 30, |  |  | Six Months Ended June 30, |
| 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Revenues from contracts with customers: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commissions | $ | 382,640 |  |  | $ | 422,974 |  |  | $ | 838,495 |  |  | $ | 853,156 |
Data, software, and post-trade |  | 20,139 |  |  |  | 18,741 |  |  |  | 39,537 |  |  |  | 36,651 |
Fees from related parties |  | 6,562 |  |  |  | 7,221 |  |  |  | 12,083 |  |  |  | 13,016 |
Other revenues |  | 3,391 |  |  |  | 3,453 |  |  |  | 7,350 |  |  |  | 5,300 |
Total revenues from contracts with customers |  | 412,732 |  |  |  | 452,389 |  |  |  | 897,465 |  |  |  | 908,123 |
Other sources of revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal transactions |  | 99,453 |  |  |  | 90,432 |  |  |  | 212,764 |  |  |  | 174,662 |
Interest and dividend income |  | 6,536 |  |  |  | 7,813 |  |  |  | 10,697 |  |  |  | 11,478 |
Other revenues |  | 367 |  |  |  | 553 |  |  |  | 1,329 |  |  |  | 1,675 |
Total revenues | $ | 519,088 |  |  | $ | 551,187 |  |  | $ | 1,122,255 |  |  | $ | 1,095,938 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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