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Earnings Per Share (Tables)
3 Months Ended
Dec. 31, 2023
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The computations of basic and diluted earnings per share are as follows:
Three Months Ended December 31,
 20232022
 (In millions, except share and per share amounts)
Numerator:
Net income$38.2 $20.8 
Denominator:
Weighted average common shares outstanding — basic50,065,832 49,890,481 
Dilutive effect of stock-based compensation396,250 8,541 
Total weighted average shares outstanding — diluted50,462,082 49,899,022 
Basic net income per common share$0.76 $0.42 
Diluted net income per common share$0.76 $0.42