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Borrowings and Borrowing Capacity - Summary of Junior Subordinated Debentures (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Face Value $ 51,031,000  
Carrying Value 40,602,000 $ 40,072,000
National Bancshares Capital Trust II    
Debt Instrument [Line Items]    
Face Value 15,464,000  
Carrying Value $ 13,350,000  
Interest rate at December 31 3.20%  
National Bancshares Capital Trust II | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Interest rate 3.00%  
National Bancshares Capital Trust III    
Debt Instrument [Line Items]    
Face Value $ 17,526,000  
Carrying Value $ 13,188,000  
Interest rate at December 31 1.76%  
National Bancshares Capital Trust III | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Interest rate 1.64%  
ColoEast Capital Trust I    
Debt Instrument [Line Items]    
Face Value $ 5,155,000  
Carrying Value $ 3,683,000  
Interest rate at December 31 1.82%  
ColoEast Capital Trust I | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Interest rate 1.60%  
ColoEast Capital Trust II    
Debt Instrument [Line Items]    
Face Value $ 6,700,000  
Carrying Value $ 4,784,000  
Interest rate at December 31 2.01%  
ColoEast Capital Trust II | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Interest rate 1.79%  
Valley Bancorp Statutory Trust I    
Debt Instrument [Line Items]    
Face Value $ 3,093,000  
Carrying Value $ 2,892,000  
Interest rate at December 31 3.62%  
Valley Bancorp Statutory Trust I | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Interest rate 3.40%  
Valley Bancorp Statutory Trust II    
Debt Instrument [Line Items]    
Face Value $ 3,093,000  
Carrying Value $ 2,705,000  
Interest rate at December 31 2.87%  
Valley Bancorp Statutory Trust II | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Interest rate 2.75%