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Common Stock and Earnings Per Share (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Mar. 11, 2013
Common Stock and Earnings Per Share [Abstract]          
Net income $ 4,484 $ 4,182 $ 8,189 $ 8,184  
Shares Used in Computing Basic and Diluted Earnings per Share [Abstract]          
Weighted average common shares, basic (in shares) 13,068,806 13,022,088 13,062,374 13,015,842  
Effect of dilutive securities [Abstract]          
Employee stock-based compensation (in shares) 1,435 882 1,088 579  
Weighted average common shares, diluted (in shares) 13,070,241 13,022,970 13,063,462 13,016,421  
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