v3.25.2
Business Combination and Asset Purchase - Additional Information (Detail)
 6 Months Ended
Oct. 01, 2022
USD ($)
Office
$ / shares
shares
Oct. 01, 2021
USD ($)
Office
$ / shares
shares
Apr. 30, 2021
USD ($)
Office
$ / shares
shares
Nov. 16, 2020
USD ($)
shares
Jan. 01, 2019
USD ($)
shares
$ / shares
Jun. 30, 2025
USD ($)
shares
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
shares
Nov. 30, 2020
USD ($)
Client
Business Acquisition [Line Items]                  
Common stock, shares outstanding | shares           13,725,998   13,699,536  
Goodwill           $ 86,358,000   $ 86,358,000  
Amortization expense           828,000 $ 828,000    
Core Deposits [Member]                  
Business Acquisition [Line Items]                  
Amortization expense           828,000 828,000    
Amortization expense for 2023           1,656,000      
Customer Lists [Member]                  
Business Acquisition [Line Items]                  
Amortization expense           61,000 $ 61,000    
Amortization expense for 2023           123,000      
Peoples Federal Savings and Loan [Member]                  
Business Acquisition [Line Items]                  
Number of full-service offices | Office 3                
Common stock issued in exchange of each outstanding share 0.6597                
Cash payment for exchange of each share | $ / shares $ 24.00                
Minimum number of shares to be exchanged under merger agreement | shares 758,566                
Common stock, shares outstanding | shares 1,167,025                
Share price | $ / shares $ 26.87                
Total consideration for acquisition $ 23,200,000                
Cash paid for the capital stock 9,800,000                
Stock issued for acquisition 13,400,000                
Goodwill 5,900,000                
Peoples Federal Savings and Loan [Member] | Core Deposits [Member]                  
Business Acquisition [Line Items]                  
Recognition of core deposit intangible asset with acquired purchase $ 6,000,000                
Remaining economic useful life 7 years                
Recognition of core deposit tangible asset with acquired purchase           6,000,000      
Amortization expense for 2023           861,000      
Perpetual Federal Savings Bank [Member]                  
Business Acquisition [Line Items]                  
Number of full-service offices | Office   1              
Common stock issued in exchange of each outstanding share   1.7766              
Cash payment for exchange of each share | $ / shares   $ 41.20              
Business acquisition share owned subject to adjustment | shares   1,833,999              
Common stock, shares outstanding | shares   2,470,032              
Share price | $ / shares   $ 22.4              
Total consideration for acquisition   $ 100,300,000              
Cash paid for the capital stock   59,200,000              
Stock issued for acquisition   41,100,000              
Goodwill   25,200,000              
Perpetual Federal Savings Bank [Member] | Core Deposits [Member]                  
Business Acquisition [Line Items]                  
Recognition of core deposit intangible asset with acquired purchase   $ 668,000              
Remaining economic useful life   7 years              
Amortization expense for 2023           95,000      
Ossian State Bank [Member]                  
Business Acquisition [Line Items]                  
Number of full-service offices | Office     2            
Ossian State Bank [Member] | Core Deposits [Member]                  
Business Acquisition [Line Items]                  
Recognition of core deposit tangible asset with acquired purchase           980,200      
Ossian Financial Services, Inc. [Member]                  
Business Acquisition [Line Items]                  
Cash payment for exchange of each share | $ / shares     $ 67.71            
Common stock, shares outstanding | shares     295,388            
Total consideration for acquisition     $ 20,000,000.0            
Goodwill     $ 7,900,000            
Goodwill deductible for tax purpose, period     15 years            
Ossian Financial Services, Inc. [Member] | Core Deposits [Member]                  
Business Acquisition [Line Items]                  
Recognition of core deposit intangible asset with acquired purchase     $ 980,200            
Remaining economic useful life     7 years            
Amortization expense for 2023           140,000      
Bank of Geneva [Member] | Core Deposits [Member]                  
Business Acquisition [Line Items]                  
Recognition of core deposit intangible asset with acquired purchase           $ 3,900,000      
Remaining economic useful life           7 years      
Limberlost Bancshares, Inc. [Member]                  
Business Acquisition [Line Items]                  
Common stock issued in exchange of each outstanding share | shares         1,830        
Cash payment for exchange of each share | $ / shares         $ 8,465        
Common stock, shares outstanding | shares         1,000        
Share price | $ / shares         $ 38.49        
Total consideration for acquisition         $ 78,900,000        
Cash paid for the capital stock         8,500,000        
Stock issued for acquisition         70,400,000        
Goodwill         43,300,000        
Limberlost Bancshares, Inc. [Member] | Core Deposits [Member]                  
Business Acquisition [Line Items]                  
Recognition of core deposit intangible asset with acquired purchase         $ 3,900,000        
Remaining economic useful life         7 years        
Perpetual Federal Savings Bank [Member] | Core Deposits [Member]                  
Business Acquisition [Line Items]                  
Recognition of core deposit tangible asset with acquired purchase           $ 668,000      
Adams County Financial Resources [Member]                  
Business Acquisition [Line Items]                  
Total consideration for acquisition       $ 825,000          
Common stock issued in exchange of each outstanding share | shares       40,049          
Assets under management amount                 $ 83,000,000
Number of clients assets under management | Client                 450
Adams County Financial Resources [Member] | Customer Lists [Member]                  
Business Acquisition [Line Items]                  
Recognition of core deposit intangible asset with acquired purchase       $ 800,000          
Remaining economic useful life       6 years 6 months          
Amortization expense for 2023           $ 123,000