Securities - Narrative (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2023 USD ($) security	Mar. 31, 2023 USD ($) security	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) security	Sep. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Apr. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)
Marketable Securities [Line Items]
Available for sale securities amortized cost transferred to held to maturity									$ 418,100,000
Available for sale securities unrealized loss transferred to held to maturity									$ 26,500,000
Debt securities, available-for-sale, allowance for credit loss	$ 0		$ 0	$ 0	$ 0		$ 0
Debt securities, available-for-sale, accrued interest receivable	4,200,000			4,200,000			4,700,000
Debt securities, held-to-maturity, accrued interest, after allowance for credit loss	1,900,000			1,900,000			1,800,000
Debt securities, held-to-maturity, allowance for credit loss	155,000		168,000	155,000	168,000	$ 160,000	168,000	$ 158,000		$ 0
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	$ 3,000,000	0	$ 3,000,000	0
U.S. agency
Marketable Securities [Line Items]
Debt securities, available-for-sale, unrealized loss position, number of positions | security	33			33
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	175			175
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	12			12
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	89			89
Debt securities, held-to-maturity, allowance for credit loss	$ 4,000		1,000	$ 4,000	1,000	1,000	1,000	2,000		0
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	112			112
Corporate
Marketable Securities [Line Items]
Debt securities, available-for-sale, unrealized loss position, number of positions | security	80			80
Debt securities, held-to-maturity, allowance for credit loss	$ 114,000		123,000	$ 114,000	123,000	116,000	123,000	121,000		0
Securities HTM charged against the allowance	$ 0		0	$ 3,000,000	0
Obligations of states and political subdivisions
Marketable Securities [Line Items]
Debt securities, available-for-sale, unrealized loss position, number of positions | security	334			334
Debt securities, held-to-maturity, allowance for credit loss	$ 33,000		39,000	$ 33,000	39,000	$ 39,000	$ 39,000	$ 30,000		$ 0
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