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v3.25.3

Collateralized transactions - Narrative (Details) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2025 USD ($) dealer customer | Dec. 31, 2024 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Bank call loans | $ 262,300,000 | $ 252,100,000
Market value of securities | 26,900,000 | 265,900,000
Customer securities under customer margin loans that are available to be pledged | 1,900,000,000 |
Re-pledged amounts under securities loans agreements | 233,200,000 |
Customer securities directly with the Options Clearing Corporation to secure obligations and margin requirements under option contracts written by customers | 361,700,000 |
Outstanding letters of credit | 0 |
Amounts pledged | $ 1,199,263,000 | 1,015,604,000
Number of broker-dealers | dealer | 3 |
Receivable from brokers and clearing organizations | $ 104,500,000 |
Number of customers | customer | 2 |
Receivable from customers | $ 652,400,000 |
Number of business days for related transactions (in days) | 1 day |
2 Largest Customers | Accounts Receivable | Customer Concentration Risk |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Concentration risk, percentage | 48.40% |
Corporate equities |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair value of securities received as collateral | $ 160,700,000 | 131,700,000
Corporate equities | Reverse Repurchase Agreements |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair value of collateral | 238,400,000 | 68,100,000
Corporate equities | Securities Borrowed Transactions |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair value of securities received as collateral, sold and re-pledged under securities loaned | $ 43,600,000 | 39,200,000
Corporate equities | Repurchase Agreements |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair value of collateral |  | $ 68,100,000

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