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Fair Value Measurements - Equity Securities without Readily Determinable Fair Value (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($) company | Dec. 31, 2022 USD ($)
Fair Value Disclosures [Abstract] |  |
Carrying value | $ 37,496 | $ 33,362
Upward changes for observable prices, cumulative amount | 18,038 | 17,367
Downward changes for observable prices, cumulative amount | (2,014) | (1,764)
Net gain (loss), cumulative amount | 16,024 | 15,603
Annual Adjustments |  |
Upward changes for observable prices | 671 | 203
Downward changes for observable prices | (250) | (1,652)
Net gain (loss) | 421 | (1,449)
Equity Securities without Readily Determinable Fair Value [Line Items] |  |
Carrying value | 37,496 | $ 33,362
Fintech Investment Portfolio |  |
Fair Value Disclosures [Abstract] |  |
Carrying value | $ 36,400 |
Equity Securities without Readily Determinable Fair Value [Line Items] |  |
Number of companies | company | 10 |
Carrying value | $ 36,400 |
Other Security Investments |  |
Fair Value Disclosures [Abstract] |  |
Carrying value | 1,100 |
Equity Securities without Readily Determinable Fair Value [Line Items] |  |
Carrying value | $ 1,100 |

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- Definition Amount of investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479536/321-10-50-3 + Details
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