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Revenue from Contracts with Customers (Tables) | 12 Months Ended
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Dec. 31, 2019
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):
|  | Year Ended December 31, 2019 |  |  | Year Ended December 31, 2018 |
Revenue from contracts with customers: |  |  |  |  |  |  |  |
Commissions |  | $ | 1,645,818 |  |  | $ | 1,511,522 |
Data, software, and post-trade |  |  | 73,166 |  |  |  | 65,185 |
Fees from related parties |  |  | 29,442 |  |  |  | 24,076 |
Other revenues |  |  | 12,806 |  |  |  | 3,837 |
Total revenue from contracts with customers |  |  | 1,761,232 |  |  |  | 1,604,620 |
Other sources of revenue: |  |  |  |  |  |  |  |
Principal transactions |  |  | 321,923 |  |  |  | 313,053 |
Interest income |  |  | 18,319 |  |  |  | 14,404 |
Other revenues |  |  | 2,757 |  |  |  | 5,733 |
Total revenues |  | $ | 2,104,231 |  |  | $ | 1,937,810 |

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