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Stock-based Compensation Plans (Narrative) (Details)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Mar. 03, 2025
Dec. 03, 2024
Mar. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
$ / shares
shares
Mar. 31, 2024
USD ($)
shares
Mar. 31, 2025
USD ($)
$ / shares
shares
Mar. 31, 2024
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 1.10% 1.10%          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 3.90% 4.10%          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 2 years 7 months 6 days 2 years 9 months 18 days          
Share-based Payment Arrangement, Expense | $     $ 3.7   $ 3.0 $ 7.6 $ 6.4
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $     $ 16.8     $ 16.8  
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount     323,349   603,417 302,180 659,148
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation     13,428     169,488  
Phantom Share Units (PSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares       $ 25.58      
Granted, shares       134,382      
Share-based compensation liability | $     $ 4.1     $ 4.1  
Share Based Compensation Arrangement By Share Based Payment Award, Fair Value | $ / shares     $ 25.42     $ 25.42  
Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares     $ 25.19 $ 25.58      
Granted, shares     7,692 64,044      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period           3 years  
Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture     0     260,727  
Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares     $ 26.60 $ 25.58      
Granted, shares     84,355 87,344      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period           3 years  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period     114,895     227,492  
Market Based Performance Shares              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares     $ 41.24 $ 38.25      
Granted, shares     7,692 64,044      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period           3 years  
Share-based Payment Arrangement, Option [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 1.41% 1.64%          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares     $ 9.14 $ 7.90      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 4.02% 4.14%          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 6 years 6 years          
Granted, shares     21,198 207,417      
Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture     151,700     246,577  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period           3 years  
Employee Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares     $ 4.53 $ 3.86      
Granted, shares     24,802 24,621      
Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price, Offering Date     85.00%        
Minimum [Member] | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Performance Factors           0  
Minimum [Member] | Market Based Performance Shares              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Performance Factors           0  
Maximum [Member] | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Performance Factors           2  
Maximum [Member] | Market Based Performance Shares              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Performance Factors           2