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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2024
Mar. 31, 2023
Statement of Comprehensive Income [Abstract]        
Income tax on minimum pension liability adjustments $ (39,500) $ (75,000.0) $ (79,000.0) $ (150,100)