Borrowing Arrangements - Federal Home Loan Bank Borrowings, Federal Reserve Bank Borrowings, and Available Lines of Credit (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Borrowing Arrangements
Securities pledged as collateral		$ 72,454,000
FHLB \| Line of credit \| FHLB of San Francisco
Borrowing Arrangements
FHLB overnight borrowings	$ 0	0
FHLB \| Line of credit \| FHLB of San Francisco
Borrowing Arrangements
Loans pledged as collateral	228,152,000	247,218,000
Securities pledged as collateral	0	0
Line of credit	$ 178,560,000	$ 198,783,000

Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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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.

+ References

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Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions.

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