Securities - Narrative (Details)	3 Months Ended				9 Months Ended
	Sep. 30, 2024 USD ($) security	Mar. 31, 2024 USD ($)	Sep. 30, 2023 USD ($)	Mar. 31, 2023 USD ($) security	Sep. 30, 2024 USD ($) security	Sep. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Marketable Securities [Line Items]
Debt securities, available-for-sale, allowance for credit loss	$ 0		$ 0		$ 0	$ 0		$ 0
Debt securities, available-for-sale, accrued interest receivable	3,500,000				3,500,000			4,600,000
Debt securities, held-to-maturity, accrued interest, after allowance for credit loss	1,800,000				1,800,000			1,800,000
Debt securities, held-to-maturity, allowance for credit loss	133,000		155,000		133,000	155,000	$ 155,000	157,000	$ 160,000	$ 168,000
Securities HTM, defaulted, number of securities | security				1
Securities HTM, provision for credit loss, period increase (decrease)				$ 3,000,000
Securities HTM charged against the allowance	0		0	$ 3,000,000	0	3,000,000
Proceeds from sale of held-to-maturity securities		$ 1,100,000
Net gains on equity securities at fair value	$ (8,000)		0		$ 2,685,000	0
U.S. agency
Marketable Securities [Line Items]
Debt securities, available-for-sale, unrealized loss position, number of positions | security	27				27
Debt securities, held-to-maturity, allowance for credit loss	$ 0				$ 0			0
U.S. agency residential mortgage-backed
Marketable Securities [Line Items]
Debt securities, available-for-sale, unrealized loss position, number of positions | security	107				107
Debt securities, held-to-maturity, allowance for credit loss	$ 0				$ 0			0
U.S. agency commercial mortgage-backed
Marketable Securities [Line Items]
Debt securities, available-for-sale, unrealized loss position, number of positions | security	10				10
Debt securities, held-to-maturity, allowance for credit loss	$ 0				$ 0			0
Private label mortgage-backed
Marketable Securities [Line Items]
Debt securities, available-for-sale, unrealized loss position, number of positions | security	76				76
Debt securities, held-to-maturity, allowance for credit loss	$ 1,000		4,000		$ 1,000	4,000	4,000	4,000	1,000	1,000
Securities HTM charged against the allowance	$ 0		0		$ 0	0
Other asset backed
Marketable Securities [Line Items]
Debt securities, available-for-sale, unrealized loss position, number of positions | security	53				53
Corporate
Marketable Securities [Line Items]
Debt securities, available-for-sale, unrealized loss position, number of positions | security	71				71
Debt securities, held-to-maturity, allowance for credit loss	$ 111,000		114,000		$ 111,000	114,000	116,000	116,000	116,000	123,000
Securities HTM charged against the allowance	$ 0		0		$ 0	3,000,000
Obligations of states and political subdivisions
Marketable Securities [Line Items]
Debt securities, available-for-sale, unrealized loss position, number of positions | security	312				312
Debt securities, held-to-maturity, allowance for credit loss	$ 17,000		33,000		$ 17,000	33,000	$ 31,000	$ 33,000	$ 39,000	$ 39,000
Securities HTM charged against the allowance	$ 0		$ 0		$ 0	$ 0
Debt Security, Government, Non-US
Marketable Securities [Line Items]
Debt securities, available-for-sale, unrealized loss position, number of positions | security	1				1