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Financing Arrangements - Narrative (Details)
$ / shares in Units, shares in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 01, 2025
USD ($)
shares
Dec. 15, 2020
USD ($)
$ / shares
Dec. 31, 2024
USD ($)
Mar. 31, 2023
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2024
USD ($)
Days
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
shares
Feb. 17, 2025
USD ($)
May 06, 2024
USD ($)
Nov. 02, 2022
USD ($)
Dec. 20, 2021
shares
Debt Instrument [Line Items]                        
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]           Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]            
Variable interest rate, spread           0.00%            
Settled with cash payment           $ 17,200,000 $ 18,700,000 $ 67,600,000        
Loss on extinguishment of debt           9,400,000 11,400,000 43,100,000        
Interest paid           2,000,000 2,100,000 3,100,000        
Money market investment carrying value     $ 110,200,000     110,200,000 139,700,000 $ 209,500,000        
Cash Held In Other Investments     125,400,000     125,400,000 119,900,000          
Common Stock, Shares outstanding | shares                       50.0
Stock Repurchase Program, Amount                     $ 75,000,000  
Average Repurchase price           $ 18.45 $ 19.03          
Common Shares                        
Debt Instrument [Line Items]                        
Stock Repurchase Program, Amount                   $ 100,000,000    
Stock Repurchased, Shares | shares           2.0 1.7 3.0        
Stock Repurchased, Amount           $ 37,600,000 $ 32,600,000 $ 52,000,000        
Average Repurchase price               17.18        
Stock Repurchase Program, Remaining Amount     102,800,000     $ 102,800,000            
Subsequent Event | Common Shares                        
Debt Instrument [Line Items]                        
Stock Repurchased, Shares | shares 0.2                      
Stock Repurchased, Amount $ 3,300,000                      
Average Repurchase price $ 14.61                      
Stock Repurchase Program, Remaining Amount                 $ 99,500,000      
Third Amended Credit Facility                        
Debt Instrument [Line Items]                        
Maturity date           Sep. 30, 2027            
Third Amended Credit Facility | Credit Agreement                        
Debt Instrument [Line Items]                        
Line of credit facility, tentative future commitment increase     217,900,000     $ 217,900,000            
Fourth Amended Credit Facility                        
Debt Instrument [Line Items]                        
Line of credit facility, maximum borrowing capacity     400,000,000     400,000,000            
Line of credit facility, tentative future commitment increase     100,000,000     $ 100,000,000            
Variable interest rate, spread           1.00%            
Line of credit facility, unused capacity, commitment fee percentage           0.25%            
Fourth Amended Credit Facility | Commercial and Standby Letters of Credit                        
Debt Instrument [Line Items]                        
Line of credit facility, borrowing sublimit     15,000,000     $ 15,000,000            
Fourth Amended Credit Facility | Swingline Loans                        
Debt Instrument [Line Items]                        
Line of credit facility, borrowing sublimit     40,000,000     40,000,000            
Fourth Amended Credit Facility | First In, Last Out (FILO)                        
Debt Instrument [Line Items]                        
Line of credit facility, tentative future commitment increase     30,000,000     $ 30,000,000            
Convertible Senior Notes due 2025                        
Debt Instrument [Line Items]                        
Maturity date   Dec. 01, 2025                    
Terms of conversion           The Convertible Senior Notes due 2025 are convertible at the option of the holders in certain circumstances and during certain periods into the Company's common shares, cash, or a combination thereof, at the Company's election.            
Principal amount     5,500,000     $ 5,500,000   0        
Principal amount, repurchased     7,800,000 $ 7,500,000 $ 25,200,000 $ 7,800,000            
Settled with cash payment     17,200,000 18,700,000 67,600,000              
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%            
Loss on extinguishment of debt     9,400,000 11,400,000 43,000,000              
Unamortized debt issuance costs     100,000 $ 200,000 $ 600,000 $ 100,000            
Debt instrument, interest rate, stated percentage   6.00%                    
Debt instrument interest payment dates description   June 1 and December 1 of each year, beginning on December 1, 2021                    
Debt instrument, convertible, conversion price | $ / shares   $ 7.82                    
Debt instrument, convertible, conversion ratio   0.1278119                    
Debt instrument, convertible, amounts by which instrument can be converted   $ 1,000                    
Transaction costs, debt gross     1,500,000     1,500,000            
Fair value of convertible notes     10,200,000     10,200,000 41,500,000          
Outstanding borrowings     $ 0     $ 0 $ 0 $ 0