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Fair value measurements - Schedule of Assets and Liabilities Not Measured at Fair Value (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financial Instruments, Estimate Not Practicable, Fair Value [Line Items] |  |
Corporate-owned life insurance | $ 107,686 | $ 98,828
Fair Value, Nonrecurring |  |
Financial Instruments, Estimate Not Practicable, Fair Value [Line Items] |  |
Cash and cash equivalents | 38,288 | 33,150
Deposits with clearing organizations | 72,015 | 70,838
Securities borrowed | 164,230 | 137,177
Receivables from brokers | 54,255 | 59,487
Securities failed to deliver | 23,975 | 8,459
Clearing organizations and other | 82,799 | 36,355
Total receivable from brokers, dealers and clearing organizations | 325,259 | 241,478
Receivable from customers | 1,374,526 | 1,268,866
Notes receivable, net | 67,366 | 67,931
Corporate-owned life insurance | 107,686 | 98,828
Investments | 2,205 | 1,634
Drafts payable | 16,763 | 21,661
Bank call loans | 262,300 | 252,100
Securities loaned | 286,694 | 235,498
Payable to brokers | 1,379 | 607
Securities failed to receive | 29,530 | 14,757
Clearing organization and other | 3,668 | 1,883
Total payables to brokers, dealers and clearing organizations | 321,271 | 252,745
Payables to customers | 465,426 | 357,835
Securities sold under agreements to repurchase | 972,167 | 931,754
Fair Value, Nonrecurring | Level 1 |  |
Financial Instruments, Estimate Not Practicable, Fair Value [Line Items] |  |
Cash and cash equivalents | 38,288 | 33,150
Deposits with clearing organizations | 72,015 | 70,838
Securities borrowed | 0 | 0
Receivables from brokers | 0 | 0
Securities failed to deliver | 0 | 0
Clearing organizations and other | 0 | 0
Total receivable from brokers, dealers and clearing organizations | 0 | 0
Receivable from customers | 0 | 0
Notes receivable, net | 0 | 0
Corporate-owned life insurance | 0 | 0
Investments | 0 | 0
Drafts payable | 16,763 | 21,661
Bank call loans | 0 | 0
Securities loaned | 0 | 0
Payable to brokers | 0 | 0
Securities failed to receive | 0 | 0
Clearing organization and other | 0 | 0
Total payables to brokers, dealers and clearing organizations | 0 | 0
Payables to customers | 0 | 0
Securities sold under agreements to repurchase | 0 | 0
Fair Value, Nonrecurring | Level 2 |  |
Financial Instruments, Estimate Not Practicable, Fair Value [Line Items] |  |
Cash and cash equivalents | 0 | 0
Deposits with clearing organizations | 0 | 0
Securities borrowed | 164,230 | 137,177
Receivables from brokers | 54,255 | 59,487
Securities failed to deliver | 23,975 | 8,459
Clearing organizations and other | 82,799 | 36,355
Total receivable from brokers, dealers and clearing organizations | 325,259 | 241,478
Receivable from customers | 1,374,526 | 1,268,866
Notes receivable, net | 67,366 | 67,931
Corporate-owned life insurance | 107,686 | 98,828
Investments | 2,205 | 1,634
Drafts payable | 0 | 0
Bank call loans | 262,300 | 252,100
Securities loaned | 286,694 | 235,498
Payable to brokers | 1,379 | 607
Securities failed to receive | 29,530 | 14,757
Clearing organization and other | 3,668 | 1,883
Total payables to brokers, dealers and clearing organizations | 321,271 | 252,745
Payables to customers | 465,426 | 357,835
Securities sold under agreements to repurchase | 972,167 | 931,754
Fair Value, Nonrecurring | Level 3 |  |
Financial Instruments, Estimate Not Practicable, Fair Value [Line Items] |  |
Cash and cash equivalents | 0 | 0
Deposits with clearing organizations | 0 | 0
Securities borrowed | 0 | 0
Receivables from brokers | 0 | 0
Securities failed to deliver | 0 | 0
Clearing organizations and other | 0 | 0
Total receivable from brokers, dealers and clearing organizations | 0 | 0
Receivable from customers | 0 | 0
Notes receivable, net | 0 | 0
Corporate-owned life insurance | 0 | 0
Investments | 0 | 0
Drafts payable | 0 | 0
Bank call loans | 0 | 0
Securities loaned | 0 | 0
Payable to brokers | 0 | 0
Securities failed to receive | 0 | 0
Clearing organization and other | 0 | 0
Total payables to brokers, dealers and clearing organizations | 0 | 0
Payables to customers | 0 | 0
Securities sold under agreements to repurchase | 0 | 0
Carrying Value | Fair Value, Nonrecurring |  |
Financial Instruments, Estimate Not Practicable, Fair Value [Line Items] |  |
Cash and cash equivalents | 38,288 | 33,150
Deposits with clearing organizations | 72,015 | 70,838
Securities borrowed | 164,230 | 137,177
Receivables from brokers | 54,255 | 59,487
Securities failed to deliver | 23,975 | 8,459
Clearing organizations and other | 82,799 | 36,355
Total receivable from brokers, dealers and clearing organizations | 325,259 | 241,478
Receivable from customers | 1,374,526 | 1,268,866
Notes receivable, net | 67,366 | 67,931
Corporate-owned life insurance | 107,686 | 98,828
Investments | 2,205 | 1,634
Drafts payable | 16,763 | 21,661
Bank call loans | 262,300 | 252,100
Securities loaned | 286,694 | 235,498
Payable to brokers | 1,379 | 607
Securities failed to receive | 29,530 | 14,757
Clearing organization and other | 3,668 | 1,883
Total payables to brokers, dealers and clearing organizations | 321,271 | 252,745
Payables to customers | 465,426 | 357,835
Securities sold under agreements to repurchase | $ 972,167 | $ 931,754

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- Definition This item represents the amount that could be realized under a life insurance contract or contracts owned by the Entity as of the date of the statement of financial position. Such Entity-owned life insurance policies are commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(12)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 325 -SubTopic 30 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481612/325-30-25-1 + Details
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