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Securities - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |
Realized gains on available-for-sale debt securities | $ 50,300 | $ 0 | $ 50,300 | $ 0
Realized losses on available-for-sale debt securities | 0 | 62,900,000 | 0 | 70,000,000.0
Available-for-sale securities sold | 39,900,000 | 510,500,000 | 429,600,000 | 510,500,000
Proceeds from sales of available-for-sale debt securities | 40,000,000 | 366,700,000 | 39,952,000 | 440,488,000
Realized gains or losses on called available-for-sale debt securities | 0 | 0 | 0 | 0
Net gains (losses) on equity securities | 34,700 | $ (36,700) | 14,300 | $ (35,700)
Federal Home Loan Bank New York (FHLBNY) |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |
Holdings of FHLBNY, FHLBPITT and ACBB stock, amount of advances | 30,800,000 |  | 30,800,000 |
Atlantic Central Bankers Bank (ACBB) |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |
Holdings of FHLBNY, FHLBPITT and ACBB stock, amount of advances | $ 95,000 |  | $ 95,000 |

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- Definition Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-9 + Details
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- Definition Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-9 + Details
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