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Borrowing Arrangements (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Borrowing Arrangements
Investments securing FHLB advances, amortized cost	$ 716,515,000	$ 740,468,000
Debt Securities, Available-for-sale	631,524,000	648,825,000
Federal funds purchased	0	0
Federal Home Loan Bank Advances
Borrowing Arrangements
Remaining borrowing capacity	318,365,000
Investments securing FHLB advances, amortized cost	21,743,000
Federal Home Loan Bank Advances | Asset Pledged as Collateral
Borrowing Arrangements
Debt Securities	577,589,000
San Fransisco Branch
Borrowing Arrangements
Advances from FHLB	$ 0	$ 46,000,000

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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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Amount 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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Amount of short term borrowing where a bank borrows, at the federal funds rate, from another bank.

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Amount of advances from the Federal Home Loan Bank (FHLB).

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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