v3.26.1
Consolidated Statements of Stockholder's Equity Consolidated Statements of Stockholder's Equity - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive Loss
Treasury Stock, Common
Treasury Stock, Value $ (3.3)          
Common Stock, Value, Issued 0.0          
Treasury Stock, Common, Shares           (123,000)
Beginning balance (in shares) at Dec. 31, 2024   16,568,000        
Beginning balance at Dec. 31, 2024 854.6   $ 11.5 $ 880.8 $ (34.5)  
Net loss (6.3)     (6.3)    
Stock-based compensation expense $ 1.4   1.4      
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture 191,000 0        
Issuance of shares under stock plans, net $ (2.3)   (7.9)     $ (5.7)
Treasury Stock, Value, Acquired, Cost Method           $ 10.9
Treasury Stock, Value, Acquired, Cost Method (380,000)          
Stock Repurchased and Retired During Period, Shares   0        
Stock Repurchased and Retired During Period, Value $ (10.9)   0.0      
Ending balance (in shares) at Mar. 31, 2025   16,568,000        
Ending balance at Mar. 31, 2025 836.6   5.0 874.5 (34.5)  
Amortization of actuarial loss included in net periodic cost, net of tax of $0.2 and $0.0 0.0          
Treasury Stock, Value (8.5)          
Common Stock, Value, Issued 0.0          
Treasury Stock, Common, Shares           (312,000)
Treasury Stock, Value (14.8)          
Common Stock, Value, Issued $ 0.0          
Treasury Stock, Common, Shares (529,385)         (529,000)
Beginning balance (in shares) at Dec. 31, 2025   16,568,000        
Beginning balance at Dec. 31, 2025 $ 825.3   8.3 862.3 (30.5)  
Net loss (12.8)          
Stock-based compensation expense $ 1.3   1.3      
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture 87,000        
Issuance of shares under stock plans, net $ (0.5)   (3.6)     $ (3.0)
Ending balance (in shares) at Mar. 31, 2026   16,568,000        
Ending balance at Mar. 31, 2026 813.8   $ 6.0 $ 849.4 (29.9)  
Amortization of actuarial loss included in net periodic cost, net of tax of $0.2 and $0.0 0.6       $ 0.6  
Treasury Stock, Value (11.8)          
Common Stock, Value, Issued $ 0.0          
Treasury Stock, Common, Shares (442,469)         (442,000)