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Collateralized transactions - Schedule of Disaggregation of Gross Obligations by Class (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
U.S. Government and Agency securities |  | $ 306,793
Equity securities |  | $ 244,223
Overnight and Open |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
U.S. Government and Agency securities | $ 411,713 |
Equity securities | 281,407 |
Gross amount of recognized liabilities for repurchase agreements and securities loaned | $ 693,120 |

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- Definition Amount, before effects of master netting arrangements, of securities loaned to entities in exchange for collateral and funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 7 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=109249958&loc=SL34722452-111729 + Details
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