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Revenue from contracts with customers - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Contracts with Customers Assets and Liabilities [Line Items] |  |
Total receivables | $ 39,861 | $ 32,773
Total deferred revenue | 1,118 | 900
Investment banking fees |  |
Contracts with Customers Assets and Liabilities [Line Items] |  |
Total deferred revenue | 1,118 | 900
Commission |  |
Contracts with Customers Assets and Liabilities [Line Items] |  |
Total receivables | 4,554 | 3,533
Mutual fund income |  |
Contracts with Customers Assets and Liabilities [Line Items] |  |
Total receivables | 5,365 | 4,993
Advisory fees |  |
Contracts with Customers Assets and Liabilities [Line Items] |  |
Total receivables | 5,746 | 5,368
Bank deposit sweep income |  |
Contracts with Customers Assets and Liabilities [Line Items] |  |
Total receivables | 5,223 | 9,057
Investment banking fees |  |
Contracts with Customers Assets and Liabilities [Line Items] |  |
Total receivables | 12,847 | 5,136
Other |  |
Contracts with Customers Assets and Liabilities [Line Items] |  |
Total receivables | $ 6,126 | $ 4,686

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- Definition [Line Items] for Contracts with Customers Assets and Liabilities [Table] + References No definition available. + Details
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-2 + Details
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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right to consideration is unconditional. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 954 -SubTopic 310 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481058/954-310-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-8 + Details
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