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Consolidated Statements of Shareholders' Equity (Parentheticals) - $ / shares
3 Months Ended 6 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2024
Mar. 31, 2023
Accounting Standards Update [Extensible Enumeration]     Accounting Standards Update 2016-13 [Member]  
Common Stock        
Dividends paid per common share (in dollars per share) $ 0.24 $ 0.23 $ 0.47 $ 0.55