Securities - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Securities available-for-sale, at fair value, post ASU 2019-04	$ 500,821,000		$ 500,821,000		$ 408,410,000
Gross gains	0	$ 0	0	$ 0
Provision for credit losses, HTM	0	0	0	0
Provision for credit losses, AFS	0	$ 0	0	$ 0
Impairment on other investments			0
Securities held-to-maturity, at amortized cost, post ASU 2019-04	128,996,000		128,996,000		281,236,000
Allowance for off balance sheet credit	2,000,000.0		2,000,000.0		2,400,000
Asset Pledged as Collateral [Member] | Secure Public Funds and Securities Sold under Agreements to Repurchase [Member]
Securities available-for-sale, at fair value, post ASU 2019-04	$ 468,600,000		$ 468,600,000		$ 358,300,000