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STOCKHOLDERS' EQUITY Dividends (Details)
 1 Months Ended 3 Months Ended 9 Months Ended
Oct. 26, 2021
dividend
$ / shares
Jan. 31, 2021
item
$ / shares
Jul. 31, 2020
USD ($)
$ / shares
Apr. 30, 2020
USD ($)
$ / shares
Oct. 31, 2019
USD ($)
$ / shares
Sep. 30, 2021
USD ($)
$ / shares
Sep. 30, 2020
USD ($)
$ / shares
Sep. 30, 2021
USD ($)
$ / shares
Sep. 30, 2020
USD ($)
$ / shares
Dividends Declared and Paid [Line Items]                  
Dividends declared and paid | $           $ 7,840,000 $ 6,582,000 $ 23,552,000 $ 18,497,000
Dividends declared per common share           $ 0.13 $ 0.11 $ 0.39 $ 0.31
Common Stock, Dividends, Number of Quarterly Distributions Declared   4 2 3 4        
Common Stock, Dividends, Per Share, Declared, Prior Fiscal Year, Each Quarter         $ 0.095        
Common Stock, Dividends Per Share Declared, Prior Fiscal Year, Second Quarter       $ 0.105          
Common Stock, Dividends Per Share Declared, Prior Fiscal Year, Third Quarter     $ 0.11 0.105          
Common Stock, Dividends Per Share Declared, Prior Fiscal Year, Fourth Quarter     $ 0.11 $ 0.105          
Common Stock, Dividends, Increase Per Share, Declared, Current Fiscal Year, Each Quarter   $ 0.02              
Common Stock, Dividends, Per Share, Declared, Current Fiscal Year, Each Quarter   $ 0.13              
Subsequent event                  
Dividends Declared and Paid [Line Items]                  
Common Stock, Dividends, Number of Quarterly Distributions Declared | dividend 5                
Common Stock, Dividends Per Share Declared, Current Fiscal Year, Fourth Quarter $ 0.15                
Common Stock, Dividends, Per Share, Declared, Next Fiscal Year, Each Quarter $ 0.15