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Securities - Narrative (Details) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2023 USD ($) security | Dec. 31, 2022 USD ($) security | Dec. 31, 2023 USD ($) security | Dec. 31, 2022 USD ($) security | Dec. 31, 2021 USD ($)
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |  |
Recognized gains on called available-for-sale securities |  |  | $ 0 | $ 0 | $ 0
Recognized gains (losses) on equity securities |  |  | 10,000 | (125,000) | (26,000)
Proceeds from sale of VISA Class B shares |  | $ 11,400,000 | $ 0 | $ 11,407,000 | $ 0
Net gain on sale of VISA Class B shares | $ 11,400,000 |  |  |  |
Number of securities in an unrealized loss position | security | 572 | 635 | 572 | 635 |
Securities pledged or sold under agreements to repurchase | $ 1,000,000,000 | $ 1,800,000,000 | $ 1,000,000,000 | $ 1,800,000,000 |
Number of equity fund | security | 1 |  | 1 |  |
Equity method investments | $ 500,000 | $ 1,500,000 | $ 500,000 | $ 1,500,000 |
Equity method investment, other than temporary Impairment |  |  | 0 |  |
Federal Home Loan Bank New York (FHLBNY) |  |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |  |
Federal home loan bank, advances, branch of FHLB bank, amount of advances | 33,600,000 |  | 33,600,000 |  |
Atlantic Central Bankers Bank (ACBB) |  |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |  |
Federal home loan bank, advances, branch of FHLB bank, amount of advances | $ 95,000 |  | $ 95,000 |  |

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- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-4 + Details
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