XML 130 R115.htm IDEA: XBRL DOCUMENT v3.20.4
Subsequent Events - Additional Information (Detail)
$ / shares in Units, $ in Millions
Dec. 21, 2020
USD ($)
Office
$ / shares
Dec. 31, 2021
Office
Jan. 15, 2021
shares
Dec. 31, 2020
shares
Sep. 30, 2020
USD ($)
Office
Dec. 31, 2019
shares
Subsequent Event [Line Items]            
Common stock, shares outstanding | shares       12,230,000   12,230,000
Forecast [Member]            
Subsequent Event [Line Items]            
Number of offices as part of strategic plan | Office   4        
F&M [Member]            
Subsequent Event [Line Items]            
Loans $ 445.0          
Deposits $ 462.0          
Number of office operates | Office 11          
Maximum [Member] | Subsequent Event [Member] | Board of Directors [Member]            
Subsequent Event [Line Items]            
Common stock, shares outstanding | shares     500,000      
Ossian Financial Services, Inc [Member]            
Subsequent Event [Line Items]            
Assets         $ 122.0  
Loans         58.0  
Deposits         108.0  
Consolidated equity         $ 11.9  
Aggregate cash consideration $ 20.0          
Share price | $ / shares $ 67.71          
Ossian Financial Services, Inc [Member] | Maximum [Member]            
Subsequent Event [Line Items]            
Total consideration for acquisition $ 12.0          
Ossian Financial Services, Inc [Member] | Northeast Indiana [Member]            
Subsequent Event [Line Items]            
Number of operate full service offices | Office         2