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Financing Arrangements - Narrative (Details)
shares in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Oct. 31, 2025
USD ($)
shares
Sep. 30, 2025
USD ($)
shares
Jun. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2025
USD ($)
Days
shares
Sep. 30, 2024
USD ($)
shares
May 06, 2024
USD ($)
Nov. 02, 2022
USD ($)
Dec. 20, 2021
shares
Debt Instrument [Line Items]                  
Cash paid to the noteholder         $ 9,100,000 $ 0      
Loss on extinguishment of debt   $ 0   $ 0 (3,600,000) 0      
Common Stock, Shares outstanding | shares                 50.0
Stock Repurchase Program, Amount             $ 100,000,000 $ 75,000,000  
Average Repurchase price   16.38   17.29 14.31 18.82      
Money market investment carrying value   51,600,000   125,900,000 51,600,000 125,900,000      
Cash held in other investments   $ 96,300,000   $ 124,100,000 96,300,000 124,100,000      
Interest paid         $ 900,000 $ 1,300,000      
Common Shares                  
Debt Instrument [Line Items]                  
Stock Repurchased, Shares | shares   0.2   1.2 0.9 1.8      
Stock Repurchased, Amount   $ 3,000,000   $ 20,100,000 $ 11,900,000 $ 34,100,000      
Stock Repurchase Program, Remaining Amount   90,900,000     90,900,000        
Subsequent Event                  
Debt Instrument [Line Items]                  
Average Repurchase price $ 17.06                
Subsequent Event | Common Shares                  
Debt Instrument [Line Items]                  
Stock Repurchased, Shares | shares 0.1                
Stock Repurchased, Amount $ 1,100,000                
Stock Repurchase Program, Remaining Amount $ 89,800,000                
Fourth Amended Credit Facility | Credit Agreement                  
Debt Instrument [Line Items]                  
Outstanding borrowings   0     0        
Line of credit facility, tentative future commitment increase   245,400,000     245,400,000        
Convertible Senior Notes due 2025                  
Debt Instrument [Line Items]                  
Transaction costs, debt gross   1,500,000     $ 1,500,000        
Cash paid to the noteholder     $ 9,100,000            
Debt instrument, threshold trading days | Days         20        
Debt Instrument, threshold consecutive trading days | Days         30        
Debt Instrument, threshold Percentage of stock price conversion         130.00%        
Company repaid principal amount     5,500,000            
Loss on extinguishment of debt     $ 3,600,000            
Convertible Senior Notes due 2025 | Convertible Notes                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount   $ 46,000,000     $ 46,000,000