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EARNINGS PER SHARE, Stock Split (Details)
shares in Thousands
3 Months Ended 6 Months Ended
Dec. 13, 2021
Nov. 09, 2021
Sep. 30, 2021
$ / shares
shares
Sep. 30, 2020
$ / shares
shares
Sep. 30, 2021
$ / shares
shares
Sep. 30, 2020
$ / shares
shares
Earnings per common share [Abstract]            
Basic - pro forma (in dollars per share) | $ / shares     $ 1.18 $ 0.74 $ 2.06 $ 1.39
Diluted - pro forma (in dollars per share) | $ / shares     $ 1.17 $ 0.74 $ 2.04 $ 1.39
Weighted average common shares outstanding [Abstract]            
Basic - pro forma (in shares) | shares     26,664 26,744 26,666 26,694
Diluted - pro forma (in shares) | shares     26,864 26,782 26,862 26,788
Forecast [Member]            
Stock Split [Abstract]            
Percentage of stock dividend 100.00%          
Subsequent Event [Member]            
Stock Split [Abstract]            
Stock split, conversion ratio   2        
Dividend payable, date to be paid   Dec. 13, 2021        
Dividend payable, date of record   Nov. 29, 2021