Investment Securities - Narrative (Details)	3 Months Ended	6 Months Ended		8 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) security	Jun. 30, 2022 USD ($)	Sep. 01, 2022 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, accrued interest receivable		$ 2,500,000				$ 2,600,000
Held-to-maturity securities, accrued interest receivable		1,900,000				1,900,000
Held-to-maturity, book value				$ 511,000,000
Fair Value		404,706,000		477,000,000		411,264,000
Available-for-sale to held-to-maturity, transfer unrealized loss				$ 34,000,000
Proceeds from sales of investment securities, available-for-sale	$ 0	$ 0	$ 3,061,000
Gross realized gain on sale			24,000
Number of available for sale securities that have unrealized losses | security		286
Number of held to maturity securities that have unrealized losses | security		154
Allowance for credit loss	$ 13,963,000	$ 17,066,000	$ 13,963,000		$ 16,599,000	16,128,000	$ 12,919,000	$ 12,910,000
Investment Securities
Debt Securities, Available-for-sale [Line Items]
Allowance for credit loss		0
Asset Pledged as Collateral
Debt Securities, Available-for-sale [Line Items]
Investment securities pledged as collateral		$ 418,000,000				$ 541,800,000