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Derivative and Other Financial Instruments with Off-Balance Sheet Risks - Additional Information (Details)
3 Months Ended 9 Months Ended
Mar. 31, 2023
USD ($)
loan
Mar. 31, 2022
USD ($)
loan
Mar. 31, 2023
USD ($)
loan
Mar. 31, 2022
USD ($)
loan
Dec. 31, 2022
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Derivative [Line Items]                
Outstanding derivative financial instruments $ 0   $ 0     $ 0    
Number Of Loans Repurchased | loan 0 0 0 0        
Recourse Liability $ 160,000 $ 160,000 $ 160,000 $ 160,000 $ 160,000 160,000 $ 160,000 $ 200,000
Mortgage Partnership Finance (MPF) Program                
Derivative [Line Items]                
Basis point of loss absorbed by first loss account     0.04          
Other Investors | Mortgage Partnership Finance (MPF) Program                
Derivative [Line Items]                
Recourse Liability 150,000   $ 150,000     150,000    
FHLB - San Francisco [Member]                
Derivative [Line Items]                
Recourse Liability $ 10,500   $ 10,500     $ 10,500