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Borrowing Arrangements (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Borrowing Arrangements
Investments securing FHLB advances, amortized cost	$ 524,829,000
Available-for-sale debt securities	522,943,000	$ 470,746,000
Federal funds purchased	0	0
Federal Home Loan Bank Advances
Borrowing Arrangements
Loans Pledged as Collateral	440,626,000
Remaining borrowing capacity	257,146,000
Federal Home Loan Bank Advances | Securities Pledged as Collateral
Borrowing Arrangements
Investments securing FHLB advances, amortized cost	236,000	248,000
Available-for-sale debt securities	243,000	$ 256,000
San Fransisco Branch
Borrowing Arrangements
Advances from FHLB	$ 0

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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 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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Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

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