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Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Total
Stock Options
Common Stock
Common Stock
Stock Options
Retained Earnings
Accumulated Other Comprehensive Loss
Balance at beginning of period (in shares) at Sep. 30, 2019     8,329,419      
Balance at beginning of period at Sep. 30, 2019 $ 171,067   $ 43,030   $ 127,987 $ 50 [1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 17,912       17,912  
Other comprehensive income (loss) (74)         (74)
Repurchase of common stock (in shares)     (56,601)      
Repurchase of common stock $ (1,238)   $ (1,238)      
Exercise of stock options (in shares) 37,975   37,975      
Exercise of stock options $ 391   $ 391      
Common stock dividends (5,421)       (5,421)  
Earned ESOP shares, net of income taxes 31   $ 31      
Stock option compensation expense   $ 138   $ 138    
Balance at end of period (in shares) at Jun. 30, 2020     8,310,793      
Balance at end of period at Jun. 30, 2020 182,806   $ 42,352   140,478 (24) [1]
Balance at beginning of period (in shares) at Mar. 31, 2020     8,309,193      
Balance at beginning of period at Mar. 31, 2020 178,008   $ 42,258   135,929 (179) [1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 6,211       6,211  
Other comprehensive income (loss) 155         155
Exercise of stock options (in shares)     1,600      
Exercise of stock options 17   $ 17      
Common stock dividends (1,662)       (1,662)  
Earned ESOP shares, net of income taxes 31   $ 31      
Stock option compensation expense   46   46    
Balance at end of period (in shares) at Jun. 30, 2020     8,310,793      
Balance at end of period at Jun. 30, 2020 182,806   $ 42,352   140,478 (24) [1]
Balance at beginning of period (in shares) at Sep. 30, 2020     8,310,793      
Balance at beginning of period at Sep. 30, 2020 187,630 [2]   $ 42,396   145,173 61 [1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 21,565       21,565  
Other comprehensive income (loss) 68         68
Repurchase of common stock (in shares)     (19,588)      
Repurchase of common stock $ (527)   $ (527)      
Exercise of stock options (in shares) 62,764   62,764      
Exercise of stock options $ 616   $ 616      
Common stock dividends (5,999)       (5,999)  
Stock option compensation expense   139   139    
Balance at end of period (in shares) at Jun. 30, 2021     8,353,969      
Balance at end of period at Jun. 30, 2021 203,492   $ 42,624   160,739 129 [1]
Balance at beginning of period (in shares) at Mar. 31, 2021     8,361,457      
Balance at beginning of period at Mar. 31, 2021 198,543   $ 42,949   155,473 121 [1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 7,024       7,024  
Other comprehensive income (loss) 8         8
Repurchase of common stock (in shares)     (16,688)      
Repurchase of common stock (469)   $ (469)      
Exercise of stock options (in shares)     9,200      
Exercise of stock options 97   $ 97      
Common stock dividends (1,758)       (1,758)  
Stock option compensation expense   $ 47   $ 47    
Balance at end of period (in shares) at Jun. 30, 2021     8,353,969      
Balance at end of period at Jun. 30, 2021 $ 203,492   $ 42,624   $ 160,739 $ 129 [1]
[1] All amounts are net of income taxes.
[2] Derived from audited consolidated financial statements.