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Cash and Due from Banks	12 Months Ended
Cash and Due from Banks	Dec. 31, 2020
Cash and Due from Banks [Abstract]
Cash and Due from Banks	Cash and Due from Banks The Company is required to maintain cash balances or deposits with the Federal Reserve Bank of San Francisco ("Federal Reserve Bank") sufficient to meet its statutory reserve requirements and for purposes of settling financial transactions and charges for Federal Reserve Bank services. The average reserve requirement for the maintenance period, which included December 31, 2020, was zero. The Company is required to maintain a $250,000 balance with a correspondent bank for outsourced servicing of ATMs. The Company is required to maintain a $100,000 and $2.8 million balance with a correspondent bank to collateralize the initial margin and the fair value exposure of one of its interest rate swaps, respectively.