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Summary of Significant Accounting Policies - Additional Information (Details)
 3 Months Ended
Sep. 19, 2023
USD ($)
$ / shares
shares
Sep. 30, 2024
USD ($)
Location
$ / shares
shares
Sep. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
$ / shares
shares
Jul. 01, 2023
USD ($)
Jun. 30, 2023
USD ($)
Summary of Significant Accounting Policies [Line Items]            
Conversion shares sold | shares 9,055,172          
Common stock per share | $ / shares $ 10 $ 0.01   $ 0.01    
Cash     $ 91,586,000      
Common stock outstanding | shares 9,441,642 9,441,642   9,507,930    
Number of full service branch locations | Location   14        
Number of operating leases acquired | Location   10        
Allowance for credit losses   $ 5,075,000 $ 5,325,000 $ 5,229,000   $ 1,116,000
Retained earnings   $ 117,572,000   $ 116,205,000 $ 127,065,000  
ASU 2016-02            
Summary of Significant Accounting Policies [Line Items]            
Change in accounting principle, accounting standards update, adopted [true false]   true        
Change in accounting principle, accounting standards update, adoption date   Sep. 30, 2022        
Change in accounting principle, accounting standards update, immaterial effect [true false]   true        
ASU 2016-13            
Summary of Significant Accounting Policies [Line Items]            
Allowance for credit losses         47,000 $ 47,000
Deferred tax assets         13,000  
Retained earnings         $ 34,000  
Somerset Regal Charitable Foundation Inc            
Summary of Significant Accounting Policies [Line Items]            
Common stock issued | shares 452,758          
Cash $ 905,517          
Regal Bancorp Inc            
Summary of Significant Accounting Policies [Line Items]            
Right to exchange their shares price | $ / shares $ 23          
Somerset Savings Bank Employee Stock Ownership Plan            
Summary of Significant Accounting Policies [Line Items]            
Conversion shares sold | shares 760,634