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Common Stock and Earnings Per Share - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 30 Months Ended
Nov. 30, 2021
May 04, 2021
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Mar. 19, 2020
Class of Stock [Line Items]                
Number of antidilutive shares         0 0    
Employee | Minimum                
Class of Stock [Line Items]                
Restricted shares, vesting period         1 year      
Employee | Maximum                
Class of Stock [Line Items]                
Restricted shares, vesting period         4 years      
Director                
Class of Stock [Line Items]                
Restricted shares, vesting period         12 months      
Dividend Reinvestment Plan                
Class of Stock [Line Items]                
Shares authorized per plan (in shares)     330,750   330,750   330,750  
2014 Restricted Stock Plan                
Class of Stock [Line Items]                
Aggregate shares granted (in shares)         200,000      
Shares granted (in shares)         164,537      
Shares forfeited and available for reissuance (in shares)         5,073      
Restricted shares vested during period (in shares)         90,798      
Granted shares unvested (in shares)     68,666   68,666   68,666  
Allocated share-based compensation expense     $ 237 $ 227 $ 694 $ 533    
Underwritten Public Offering                
Class of Stock [Line Items]                
Common shares issued through follow-on public offering, net of underwriting discounts and offering expenses (in shares)   3,000,000            
Common stock, price per share (in dollars per share)   $ 25.00            
Net proceeds received after underwriting discount and other estimated offering expenses   $ 70,200            
Net proceeds of the offering   4,500            
Aggregate gross proceeds of offering   $ 74,800     $ 0 $ 70,238    
Riverview                
Class of Stock [Line Items]                
Ratio of conversion of acquiree's shares to entity's shares (in shares) 48.33%              
Stock issued during period (in shares) 4,519,776              
Riverview | Underwritten Public Offering                
Class of Stock [Line Items]                
Stock issued during period (in shares) 4,519,776              
Treasury Stock Repurchase Program                
Class of Stock [Line Items]                
Stock repurchase program, authorized amount (in shares)               $ 15,000
Percentage of issued shares based on closing stock price               3.50%
Stock repurchased during period (in shares)         109,891 5,800 208,343  
Stock repurchased at average price per share (in dollars per share)         $ 23.42      
Stock repurchase program, remaining available repurchase amount     $ 10,100   $ 10,100   $ 10,100