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Securities - Narrative (Details)	3 Months Ended		12 Months Ended
	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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Fair value of securities pledged as collateral against securities sold under agreement to repurchase.

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