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v3.23.3

Fair value measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
ASSETS |  |
Deposits with clearing organizations | $ 34,970 | $ 24,937
Securities owned: |  |
Securities owned, at fair value | 853,945 | 498,594
Investments | 16,060 | 7,068
Derivative contracts: |  |
Derivative contracts, total | 154 |
Total | 905,129 | 532,361
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 45,577 | 52,768
Derivative contracts: |  |
Derivative contracts | 2,020 | 1,805
Total | 47,597 | 54,573
U.S. Treasury securities |  |
Securities owned: |  |
Securities owned, at fair value | 710,730 | 362,815
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 12,505 | 25,006
U.S. Agency securities |  |
Securities owned: |  |
Securities owned, at fair value | 2 | 6,012
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value |  | 3
Sovereign obligations |  |
Securities owned: |  |
Securities owned, at fair value | 261 | 9,502
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value |  | 9,048
Corporate debt and other obligations |  |
Securities owned: |  |
Securities owned, at fair value | 23,079 | 9,844
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 13,799 | 2,905
Mortgage and other asset-backed securities |  |
Securities owned: |  |
Securities owned, at fair value | 6,664 | 1,882
Municipal obligations |  |
Securities owned: |  |
Securities owned, at fair value | 61,735 | 30,126
Convertible bonds |  |
Securities owned: |  |
Securities owned, at fair value | 19,028 | 21,800
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 8,117 | 4,428
Corporate equities |  |
Securities owned: |  |
Securities owned, at fair value | 29,360 | 24,837
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 11,013 | 11,378
Money markets |  |
Securities owned: |  |
Securities owned, at fair value | 373 |
Auction rate securities |  |
Securities owned: |  |
Securities owned, at fair value | 2,713 | 31,776
TBAs |  |
Derivative contracts: |  |
Derivative contracts, total | 153 | 1,762
Derivative contracts: |  |
Derivative contracts | 146 | 1,761
Futures |  |
Derivative contracts: |  |
Derivative contracts, total | 1 |
Derivative contracts: |  |
Derivative contracts | 1,874 | 44
Level 1 |  |
ASSETS |  |
Deposits with clearing organizations | 34,970 | 24,937
Securities owned: |  |
Securities owned, at fair value | 740,090 | 387,652
Investments | 3,976 | 0
Derivative contracts: |  |
Derivative contracts, total | 1 |
Total | 779,037 | 412,589
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 23,518 | 36,384
Derivative contracts: |  |
Derivative contracts | 1,874 | 44
Total | 25,392 | 36,428
Level 1 | U.S. Treasury securities |  |
Securities owned: |  |
Securities owned, at fair value | 710,730 | 362,815
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 12,505 | 25,006
Level 1 | U.S. Agency securities |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value |  | 0
Level 1 | Sovereign obligations |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value |  | 0
Level 1 | Corporate debt and other obligations |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 0 | 0
Level 1 | Mortgage and other asset-backed securities |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Level 1 | Municipal obligations |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Level 1 | Convertible bonds |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 0 | 0
Level 1 | Corporate equities |  |
Securities owned: |  |
Securities owned, at fair value | 29,360 | 24,837
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 11,013 | 11,378
Level 1 | Money markets |  |
Securities owned: |  |
Securities owned, at fair value | 0 |
Level 1 | Auction rate securities |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Level 1 | TBAs |  |
Derivative contracts: |  |
Derivative contracts, total | 0 | 0
Derivative contracts: |  |
Derivative contracts | 0 | 0
Level 1 | Futures |  |
Derivative contracts: |  |
Derivative contracts, total | 1 |
Derivative contracts: |  |
Derivative contracts | 1,874 | 44
Level 2 |  |
ASSETS |  |
Deposits with clearing organizations | 0 | 0
Securities owned: |  |
Securities owned, at fair value | 111,142 | 79,166
Investments | 12,084 | 7,068
Derivative contracts: |  |
Derivative contracts, total | 153 |
Total | 123,379 | 87,996
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 22,059 | 16,384
Derivative contracts: |  |
Derivative contracts | 146 | 1,761
Total | 22,205 | 18,145
Level 2 | U.S. Treasury securities |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 0 | 0
Level 2 | U.S. Agency securities |  |
Securities owned: |  |
Securities owned, at fair value | 2 | 6,012
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value |  | 3
Level 2 | Sovereign obligations |  |
Securities owned: |  |
Securities owned, at fair value | 261 | 9,502
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value |  | 9,048
Level 2 | Corporate debt and other obligations |  |
Securities owned: |  |
Securities owned, at fair value | 23,079 | 9,844
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 13,799 | 2,905
Level 2 | Mortgage and other asset-backed securities |  |
Securities owned: |  |
Securities owned, at fair value | 6,664 | 1,882
Level 2 | Municipal obligations |  |
Securities owned: |  |
Securities owned, at fair value | 61,735 | 30,126
Level 2 | Convertible bonds |  |
Securities owned: |  |
Securities owned, at fair value | 19,028 | 21,800
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 8,117 | 4,428
Level 2 | Corporate equities |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 0 | 0
Level 2 | Money markets |  |
Securities owned: |  |
Securities owned, at fair value | 373 |
Level 2 | Auction rate securities |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Level 2 | TBAs |  |
Derivative contracts: |  |
Derivative contracts, total | 153 | 1,762
Derivative contracts: |  |
Derivative contracts | 146 | 1,761
Level 2 | Futures |  |
Derivative contracts: |  |
Derivative contracts, total | 0 |
Derivative contracts: |  |
Derivative contracts | 0 | 0
Level 3 |  |
ASSETS |  |
Deposits with clearing organizations | 0 | 0
Securities owned: |  |
Securities owned, at fair value | 2,713 | 31,776
Investments | 0 | 0
Derivative contracts: |  |
Derivative contracts, total | 0 |
Total | 2,713 | 31,776
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 0 | 0
Derivative contracts: |  |
Derivative contracts | 0 | 0
Total | 0 | 0
Level 3 | U.S. Treasury securities |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 0 | 0
Level 3 | U.S. Agency securities |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value |  | 0
Level 3 | Sovereign obligations |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value |  | 0
Level 3 | Corporate debt and other obligations |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 0 | 0
Level 3 | Mortgage and other asset-backed securities |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Level 3 | Municipal obligations |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Level 3 | Convertible bonds |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 0 | 0
Level 3 | Corporate equities |  |
Securities owned: |  |
Securities owned, at fair value | 0 | 0
Securities sold but not yet purchased: |  |
Securities sold but not yet purchased, at fair value | 0 | 0
Level 3 | Money markets |  |
Securities owned: |  |
Securities owned, at fair value | 0 |
Level 3 | Auction rate securities |  |
Securities owned: |  |
Securities owned, at fair value | 2,713 | 31,776
Level 3 | TBAs |  |
Derivative contracts: |  |
Derivative contracts, total | 0 | 0
Derivative contracts: |  |
Derivative contracts | 0 | 0
Level 3 | Futures |  |
Derivative contracts: |  |
Derivative contracts, total | 0 |
Derivative contracts: |  |
Derivative contracts | $ 0 | $ 0

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