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Investment Securities - Narrative (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2025 USD ($)	Sep. 30, 2025 USD ($) position investment	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) investment	Dec. 31, 2023 USD ($)
Debt Securities, Available-for-sale [Line Items]
Carrying value of securities pledged to secure public deposits and other contractual obligations		$ 449,500		$ 424,800
Pledging requirements for credit derivatives and SWAP agreements - securities			$ 0	$ 0
Number of investments in non federal issuer representing more than 10% of shareholder's equity | investment		0		0
Maximum investment in any single non-federal issuer representing shareholders equity		10.00%		10.00%
Fair value HTM in unrealized loss with no ACL		$ 108,080		$ 115,007
Unrealized loss included in fair value of securities HTM in unrealized loss position for which an ACL has not been recorded		14,148		19,104
Fair value AFS in unrealized loss with no ACL		270,073		271,800
Unrealized loss included in fair value of securities AFS in unrealized loss position for which an ACL has not been recorded		31,797		39,575
Fair value of securities AFS in unrealized loss position for which an ACL has been recorded, net of allowance		8,800
Unrealized loss position included in fair value of securities AFS in unrealized loss position for which an ACL has been recorded		137
Allowance for credit losses		$ 18		839
U.S. Government Corporations and Agencies [Member]
Debt Securities, Available-for-sale [Line Items]
Held-to-maturity, securities in unrealized loss positions, qualitative disclosure, number of positions | position		89
Debt securities, available-for-sale, unrealized loss position, number of positions | position		101
Collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Fair value AFS in unrealized loss with no ACL		$ 1,449		1,685
Unrealized loss included in fair value of securities AFS in unrealized loss position for which an ACL has not been recorded		$ 87		133
Debt securities, available-for-sale, unrealized loss position, number of positions | position		2
Allowance for credit losses		$ 0		0
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Fair value AFS in unrealized loss with no ACL		57,422
Unrealized loss included in fair value of securities AFS in unrealized loss position for which an ACL has not been recorded		$ 3,573
Debt securities, available-for-sale, unrealized loss position, number of positions | position		8
Allowance for credit losses		$ 18	642	$ 839	$ 731
Number of securities | investment		18
Allowance for credit losses, reversed	$ 719	$ 19	$ 89
Available-for-sale Securities
Debt Securities, Available-for-sale [Line Items]
Accrued interest receivable		1,200
Allowance for credit losses		$ 18

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