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CONSOLIDATED STATEMENTS OF CONDITION (CURRENT PERIOD UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Available-for-sale securities, book value	$ 705,019	$ 796,960
Held-to-maturity securities, fair value	483,547	506,193
Loans held for sale	$ 11,299	$ 5,259
Common stock, no par value (dollars per share)	$ 0	$ 0
Common stock, authorized (in shares)	40,000,000	40,000,000
Common stock, issued (in shares)	14,558,137	14,567,325
Common stock, outstanding (in shares)	14,558,137	14,567,325

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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