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Common Stock and Earnings Per Share (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Mar. 11, 2013
Common Stock and Earnings Per Share [Abstract]          
Net income $ 4,794 $ 4,704 $ 12,983 $ 12,888  
Shares Used in Computing Basic and Diluted Earnings per Share [Abstract]          
Weighted average common shares, basic (in shares) 13,083,762 13,032,389 13,069,582 13,021,398  
Effect of dilutive securities [Abstract]          
Employee stock-based compensation (in shares) 563 1,164 347 565  
Weighted average common shares, diluted (in shares) 13,084,325 13,033,553 13,069,929 13,021,963  
Stock Repurchase Program [Abstract]          
Number of shares authorized to be repurchased under the stock repurchase program (in shares)         1,200,000
Number of shares repurchased under the stock repurchase program (in shares) 0 0 0 0  
Number of remaining shares authorized to be repurchased under the stock repurchase program (in shares) 618,004   618,004