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Employee Benefit Plans (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]      
Liability $ 645,000    
Benefit 31,000    
National Bancshares Corporation      
Defined Benefit Plan Disclosure [Line Items]      
(Benefit) expense under the plan 11 $ 180,000 $ 136
Liability under the Plan $ 975 1,100  
Director age for eligibility for annual retirement benefit plan 70 years    
Maximum years for benefit payment under the plan 15 years    
Cortland Acquisition      
Defined Benefit Plan Disclosure [Line Items]      
Period of benefits paid for after retirement 15 years    
Payment benefit for director retirement $ 10,000    
Period over which benefits paid to directors after retirement 10 years    
Liability for post-retirement benefits $ 1,700    
Expense recognized for plans 11,000    
Benefits expected to be paid in 2022 748,000    
Cortland Acquisition | Officers’ Plan      
Defined Benefit Plan Disclosure [Line Items]      
Liability for post-retirement benefits 1,600    
Cortland Acquisition | Directors Plan      
Defined Benefit Plan Disclosure [Line Items]      
Liability for post-retirement benefits $ 138,000    
Retirement Savings Plan      
Defined Benefit Plan Disclosure [Line Items]      
Employees who have completed no days of service 90 days    
Percentage of matching contribution by company 50.00%    
(Benefit) expense under the plan $ 814 665 708
Retirement Savings Plan | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of the participants' voluntary contributions of gross wages 6.00%    
Profit Sharing Plan      
Defined Benefit Plan Disclosure [Line Items]      
(Benefit) expense under the plan $ 268 $ 195 $ 95
Annual compensation for associates, Percent 2.00% 2.00% 1.00%
Deferred Compensation Plan      
Defined Benefit Plan Disclosure [Line Items]      
(Benefit) expense under the plan $ 6 $ 7 $ 7
Liability under the Plan 94 105  
Deferred compensation plan asset recorded 2,500 1,900  
Deferred compensation plan liability recorded $ 2,500 $ 1,900