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Borrowing Arrangements (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Borrowing Arrangements
Investments securing FHLB advances, amortized cost	$ 1,231,730,000	$ 1,098,373,000
Available-for-sale debt securities	1,161,756,000	1,109,208,000
Federal funds purchased	0	0
Federal Home Loan Bank Advances
Borrowing Arrangements
Loans Pledged as Collateral	493,500,000
Remaining borrowing capacity	284,114,000
Federal Home Loan Bank Advances | Securities Pledged as Collateral
Borrowing Arrangements
Investments securing FHLB advances, amortized cost	106,000	112,000
Available-for-sale debt securities	111,000	$ 117,000
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 borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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