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Investment Securities - Additional information (Details)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
item
loan
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
item
Marketable Securities [Line Items]          
Transferred investment securities, carrying value         $ 99,000
Transferred investment securities, unrealized gain         593
Proceeds from sales of available-for-sale securities $ 0 $ 0 $ 0 $ 0  
Gross gains of available-for-sale debt securities 0   0 10  
Pledged securities, market value 91,400   91,400   78,600
Pledged securities, amortized cost 105,800   $ 105,800   $ 78,800
Estimated weighted average remaining life     4 years 7 months 6 days   4 years 6 months
Equity securities with readily determinable fair values 1,913   $ 1,913   $ 1,869
Non-interest income          
Marketable Securities [Line Items]          
Loss on investment $ (107) $ (14) $ (498)    
Gain on investments       $ 85  
U.S Treasuries          
Marketable Securities [Line Items]          
Number of positions | item     31   15
U.S. government and federal agencies          
Marketable Securities [Line Items]          
Number of positions | item     50   40
Collateralized mortgage obligations          
Marketable Securities [Line Items]          
Number of positions | item     53   35
Corporate bonds          
Marketable Securities [Line Items]          
Number of positions | loan     3    
Municipal Securities          
Marketable Securities [Line Items]          
Number of positions | item     14   8
Mortgage-backed          
Marketable Securities [Line Items]          
Number of positions | item     218   75