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v3.25.3

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
--- | --- | --- | --- | --- | --- | ---
Common Stock, Value, Issued | $ 0.0 |  |  |  |  |
Beginning balance (in shares) at Dec. 31, 2023 |  | 16,485,000 |  |  |  |
Beginning balance at Dec. 31, 2023 | 668.8 |  | $ 14.9 | $ 684.5 | $ (30.7) |
Net income | 17.2 |  |  | 17.2 |  |
Stock-based compensation expense | 2.2 |  | 2.2 |  |  |
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture |  | 175,000 |  |  |  |
Issuance of shares under stock plans, net | (3.1) |  | (3.1) |  |  |
Stock Repurchased and Retired During Period, Shares |  | (13,000) |  |  |  |
Stock Repurchased and Retired During Period, Value | (0.5) |  | (0.5) |  |  |
Ending balance (in shares) at Mar. 31, 2024 |  | 16,647,000 |  |  |  |
Ending balance at Mar. 31, 2024 | 684.5 |  | 13.5 | 701.7 | (30.7) |
Beginning balance (in shares) at Dec. 31, 2023 |  | 16,485,000 |  |  |  |
Beginning balance at Dec. 31, 2023 | 668.8 |  | 14.9 | 684.5 | (30.7) |
Net income | (2.8) |  |  |  |  |
Ending balance (in shares) at Sep. 30, 2024 |  | 16,591,000 |  |  |  |
Ending balance at Sep. 30, 2024 | $ 664.6 | $ 0.0 | 13.7 | 681.7 | (30.8) |
Treasury Stock, Common, Shares | 0 |  |  |  |  |
Treasury Stock, Value | $ 0.0 |  |  |  |  |
Common Stock, Value, Issued | 0.0 |  |  |  |  |
Beginning balance (in shares) at Mar. 31, 2024 |  | 16,647,000 |  |  |  |
Beginning balance at Mar. 31, 2024 | 684.5 |  | 13.5 | 701.7 | (30.7) |
Net income | (25.8) |  |  | (25.8) |  |
Stock-based compensation expense | 2.8 |  | 2.8 |  |  |
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture |  | 59,000 |  |  |  |
Issuance of shares under stock plans, net | $ 0.2 |  | 0.2 |  |  |
Stock Repurchased and Retired During Period, Shares | (64,000) |  |  |  |  |
Stock Repurchased and Retired During Period, Value | $ (3.0) |  | (3.0) |  |  |
Ending balance (in shares) at Jun. 30, 2024 |  | 16,642,000 |  |  |  |
Ending balance at Jun. 30, 2024 | $ 658.6 |  | 13.5 | 675.8 | (30.7) |
Treasury Stock, Common, Shares | 0 |  |  |  |  |
Treasury Stock, Value | $ 0.0 |  |  |  |  |
Common Stock, Value, Issued |  | $ 0.0 |  |  |  |
Net income | 5.8 |  |  | 5.8 |  |
Stock-based compensation expense | 2.7 |  | 2.7 |  |  |
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture |  | 13,000 |  |  |  |
Issuance of shares under stock plans, net | $ 0.1 |  | 0.1 |  |  |
Stock Repurchased and Retired During Period, Shares | (64,000) |  |  |  |  |
Stock Repurchased and Retired During Period, Value | $ (2.5) |  | (2.5) |  |  |
Ending balance (in shares) at Sep. 30, 2024 |  | 16,591,000 |  |  |  |
Ending balance at Sep. 30, 2024 | $ 664.6 | $ 0.0 | 13.7 | 681.7 | (30.8) |
Treasury Stock, Common, Shares | (122,821) |  |  |  |  |
Treasury Stock, Value | $ (3.3) |  |  |  |  |
Common Stock, Value, Issued | 0.0 |  |  |  |  |
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 income | (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, 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) |
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 income | (56.9) |  |  |  |  |
Ending balance (in shares) at Sep. 30, 2025 |  | 16,568,000 |  |  |  |
Ending balance at Sep. 30, 2025 | $ 783.0 | $ 0.0 | 8.2 | 823.9 | (34.3) |
Treasury Stock, Common, Shares | (312,000) |  |  |  |  |
Treasury Stock, Value | $ (8.5) |  |  |  |  |
Common Stock, Value, Issued |  | $ 0.0 |  |  |  |
Beginning balance (in shares) at Mar. 31, 2025 |  | 16,568,000 |  |  |  |
Beginning balance at Mar. 31, 2025 | 836.6 |  | 5.0 | 874.5 | (34.5) |
Net income | 2.7 |  |  | 2.7 |  |
Stock-based compensation expense | $ 1.6 |  | 1.6 |  |  |
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture | 2,000 | 0 |  |  |  |
Issuance of shares under stock plans, net | $ 0.0 |  | (0.1) |  |  | $ 0.0
Treasury Stock, Value, Acquired, Cost Method | $ (4.2) |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method | (148,000) |  |  |  |  |
Stock Repurchased and Retired During Period, Value | $ (4.2) |  | 0.0 |  |  |
Ending balance (in shares) at Jun. 30, 2025 |  | 16,568,000 |  |  |  |
Ending balance at Jun. 30, 2025 | 836.8 |  | 6.5 | 877.3 | (34.4) |
Pension and other postretirement employee benefit plans, net of tax | $ 0.1 |  |  |  | 0.1 |
Treasury Stock, Common, Shares | (459,000) |  |  |  |  |
Treasury Stock, Value | $ (12.7) |  |  |  |  |
Common Stock, Value, Issued |  | $ 0.0 |  |  |  |
Net income | (53.3) |  |  | (53.3) |  |
Stock-based compensation expense | 1.6 |  | 1.6 |  |  |
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture |  | 0 |  |  |  |
Issuance of shares under stock plans, net | 0.0 |  | 0.0 |  |  |
Treasury Stock, Value, Acquired, Cost Method | $ (2.1) |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method | (71,000) |  |  |  |  |
Stock Repurchased and Retired During Period, Shares |  | 0 |  |  |  |
Stock Repurchased and Retired During Period, Value | $ (2.1) |  | 0.0 |  |  |
Ending balance (in shares) at Sep. 30, 2025 |  | 16,568,000 |  |  |  |
Ending balance at Sep. 30, 2025 | 783.0 | $ 0.0 | $ 8.2 | $ 823.9 | (34.3) |
Pension and other postretirement employee benefit plans, net of tax | $ 0.1 |  |  |  | $ 0.1 |
Treasury Stock, Common, Shares | (529,385) |  |  |  |  |
Treasury Stock, Value | $ (14.8) |  |  |  |  |
Common Stock, Value, Issued | $ 0.0 |  |  |  |  |

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