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Collateralized transactions - Schedule of Gross Amounts and Offsetting Amounts of Reverse Repurchase Agreements, Repurchase Agreements, Securities Borrowed and Securities Loaned Transactions (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Reverse repurchase agreements |  |
Gross Amounts of Recognized Assets | $ 27,563 | $ 8,870
Gross Amounts Offset on the Balance Sheet | (23,484) | (3,028)
Net Amounts of Assets Presented on the Balance Sheet | 4,079 | 5,842
Financial Instruments | (3,983) | 0
Cash Collateral Received | 0 | 0
Net Amount | 96 | 5,842
Securities Borrowed |  |
Gross Amounts of Recognized Assets | 134,454 | 158,612
Gross Amounts Offset on the Balance Sheet | 0 | 0
Net Amounts of Assets Presented on the Balance Sheet | 134,454 | 158,612
Financial Instruments | (132,270) | (149,946)
Cash Collateral Received | 0 | 0
Net Amount | 2,184 | 8,666
Total |  |
Gross Amounts of Recognized Assets | 162,017 | 167,482
Gross Amounts Offset on the Balance Sheet | (23,484) | (3,028)
Net Amounts of Assets Presented on the Balance Sheet | 138,533 | 164,454
Financial Instruments | (136,253) | (149,946)
Cash Collateral Received | 0 | 0
Net Amount | 2,280 | 14,508
Repurchase agreements |  |
Gross Amounts of Recognized Liabilities |  | 643,410
Gross Amounts Offset on the Balance Sheet | (23,484) | (3,028)
Net Amounts of Liabilities Presented on the Balance Sheet | 822,785 | 640,382
Financial Instruments | (817,169) | (632,521)
Cash Collateral Pledged | 0 | 0
Net Amount | 5,616 | 7,861
Securities Loaned |  |
Gross Amounts of Recognized Liabilities |  | 284,987
Gross Amounts Offset on the Balance Sheet | 0 | 0
Net Amounts of Liabilities Presented on the Balance Sheet | 247,219 | 284,987
Financial Instruments | (238,094) | (276,688)
Cash Collateral Pledged | 0 | 0
Net Amount | 9,125 | 8,299
Total |  |
Gross Amounts of Recognized Liabilities | 1,093,488 | 928,397
Gross Amounts Offset on the Balance Sheet | (23,484) | (3,028)
Net Amounts of Liabilities Presented on the Balance Sheet | 1,070,004 | 925,369
Financial Instruments | (1,055,263) | (909,209)
Cash Collateral Pledged | 0 | 0
Net Amount | $ 14,741 | $ 16,160

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