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Stock-Based Compensation - Fair Value Assumptions (Details)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
item
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
$ / shares
Additional information      
Stock-based compensation expense $ 21.8 $ 16.6 $ 12.9
Restricted Stock Units (RSUs)      
Other information      
Compensation expense yet to be recognized $ 4.8    
Weighted-average period over which compensation cost will be recognized 1 year 4 months 24 days    
Shares      
Unvested at beginning of year (in shares) | shares 79    
Granted (in shares) | shares 24    
Vested (in shares) | shares (45)    
Unvested at end of year (in shares) | shares 58 79  
Weighted Average Grant Date Fair Value      
Unvested at beginning of year (in dollars per share) | $ / shares $ 187.33    
Granted (in dollars per share) | $ / shares 378.49 $ 315.04 $ 164.47
Vested (in dollars per share) | $ / shares 185.65    
Unvested at end of year (in dollars per share) | $ / shares 269.97 187.33  
Additional information      
Weighted-average fair value (in dollars per share) | $ / shares $ 378.49 $ 315.04 $ 164.47
Aggregate intrinsic value of restricted stock vested $ 20.9 $ 19.8 $ 9.3
Performance Stock Units      
Other information      
Compensation expense yet to be recognized $ 3.3    
Weighted-average period over which compensation cost will be recognized 1 year    
Additional information      
Fair value of shares vested $ 6.6 5.4 4.5
Vesting period 3 years    
Types of performance units | item 2    
Percentage of units measured on stock price relative to peer group 50.00%    
Percentage of units measured on stock price based on pre determined EPS 50.00%    
Period for which shareholder return is compared with peer group for units determined by EPS performance 3 years    
Calculated fair market value $ 22.9    
Value of PSUs granted 8.0    
Stock-based compensation expense $ 10.9 $ 7.8 $ 6.6
Performance Stock Units | Minimum      
Additional information      
Performance measures for dollar denominated award granted 0    
Performance Stock Units | Maximum      
Additional information      
Performance measures for dollar denominated award granted 2    
2025 PSU Grant      
Fair value assumptions:      
Risk-free interest rate 3.40%    
Dividend yield 0.30%    
Volatility 53.70%    
Look-back period (in years) 2 years    
2024 PSU Grant      
Fair value assumptions:      
Risk-free interest rate 3.50% 4.20%  
Dividend yield 0.30% 0.30%  
Volatility 61.40% 40.20%  
Look-back period (in years) 1 year 2 years  
2023 PSU Grant      
Fair value assumptions:      
Risk-free interest rate   4.10% 4.20%
Dividend yield   0.30% 0.50%
Volatility   44.90% 35.00%
Look-back period (in years)   1 year 2 years
2022 PSU Grant      
Fair value assumptions:      
Risk-free interest rate     4.70%
Dividend yield     0.50%
Volatility     35.10%
Look-back period (in years)     1 year