Equity - Rollforward of Equity (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Jun. 30, 2026 |
Mar. 31, 2026 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Increase (Decrease) in Stockholders' Equity | ||||||||||||
| Beginning balance (shares) | 35,485,876 | 35,485,876 | ||||||||||
| Beginning balance | $ 46.9 | $ 38.9 | $ 29.7 | $ 120.7 | $ 234.6 | $ 195.2 | $ 29.7 | $ 195.2 | ||||
| Net income (loss) | 49.3 | 35.3 | 59.8 | 43.5 | (146.5) | 20.5 | 144.4 | [1] | (82.5) | [1] | ||
| Other comprehensive income (loss) | 1.8 | 2.6 | (2.1) | (6.6) | 28.2 | 17.4 | $ 2.3 | 39.0 | ||||
| Exercise of stock options, net | 0.0 | 1.8 | 3.3 | 0.6 | ||||||||
| Tax payments related to vested restricted stock units | (0.5) | (1.3) | (4.3) | (0.2) | (2.6) | |||||||
| Share repurchase program | (38.9) | (35.1) | (52.3) | (25.2) | ||||||||
| Share-based compensation plans | $ 4.4 | 4.7 | 4.8 | 5.3 | 4.4 | 4.1 | ||||||
| Ending balance (shares) | 33,962,129 | 33,962,129 | ||||||||||
| Ending balance | $ 63.0 | $ 46.9 | $ 38.9 | $ 138.1 | $ 120.7 | $ 234.6 | $ 63.0 | $ 138.1 | ||||
| Common Stock | ||||||||||||
| Increase (Decrease) in Stockholders' Equity | ||||||||||||
| Beginning balance (shares) | 44,217,000 | 44,122,000 | 43,892,000 | 43,800,000 | 43,785,000 | 43,630,000 | 43,892,000 | 43,630,000 | ||||
| Beginning balance | $ 0.4 | $ 0.4 | $ 0.4 | $ 0.4 | $ 0.4 | $ 0.4 | $ 0.4 | $ 0.4 | ||||
| Common stock issued (shares) | 20,000 | 67,000 | 171,000 | 9,000 | 15,000 | 155,000 | ||||||
| Exercise of stock options, net (shares) | 1,000 | 28,000 | 59,000 | 22,000 | ||||||||
| Ending balance (shares) | 44,238,000 | 44,217,000 | 44,122,000 | 43,831,000 | 43,800,000 | 43,785,000 | 44,238,000 | 43,831,000 | ||||
| Ending balance | $ 0.4 | $ 0.4 | $ 0.4 | $ 0.4 | $ 0.4 | $ 0.4 | $ 0.4 | $ 0.4 | ||||
| Additional paid-in capital | ||||||||||||
| Increase (Decrease) in Stockholders' Equity | ||||||||||||
| Beginning balance | 209.1 | 203.4 | 195.7 | 185.3 | 180.9 | 176.8 | 195.7 | 176.8 | ||||
| Exercise of stock options, net | 1.8 | 3.3 | 0.6 | |||||||||
| Share-based compensation plans | 4.0 | 3.9 | 4.4 | 5.3 | 4.4 | 4.1 | ||||||
| Ending balance | 213.1 | 209.1 | 203.4 | 191.2 | 185.3 | 180.9 | 213.1 | 191.2 | ||||
| Retained earnings | ||||||||||||
| Increase (Decrease) in Stockholders' Equity | ||||||||||||
| Beginning balance | 500.0 | 464.7 | 404.9 | 446.0 | 592.5 | 572.0 | 404.9 | 572.0 | ||||
| Net income (loss) | 49.3 | 35.3 | 59.8 | 43.5 | (146.5) | 20.5 | ||||||
| Ending balance | 549.3 | 500.0 | 464.7 | 489.5 | 446.0 | 592.5 | 549.3 | 489.5 | ||||
| Accumulated other comprehensive income (loss) | ||||||||||||
| Increase (Decrease) in Stockholders' Equity | ||||||||||||
| Beginning balance | 1.0 | (1.6) | 0.5 | 4.2 | (24.0) | (41.4) | 0.5 | (41.4) | ||||
| Other comprehensive income (loss) | 1.8 | 2.6 | (2.1) | (6.6) | 28.2 | 17.4 | ||||||
| Ending balance | 2.8 | 1.0 | (1.6) | (2.4) | 4.2 | (24.0) | 2.8 | (2.4) | ||||
| Treasury stock | ||||||||||||
| Increase (Decrease) in Stockholders' Equity | ||||||||||||
| Beginning balance | (663.6) | (628.0) | (571.8) | (515.2) | (515.2) | (512.6) | (571.8) | (512.6) | ||||
| Tax payments related to vested restricted stock units | (0.5) | (1.3) | (4.3) | (0.2) | (2.6) | |||||||
| Share repurchase program | (38.9) | (35.1) | (52.3) | (25.2) | ||||||||
| Share-based compensation plans | 0.4 | 0.8 | 0.4 | |||||||||
| Ending balance | $ (702.6) | $ (663.6) | $ (628.0) | $ (540.6) | $ (515.2) | $ (515.2) | $ (702.6) | $ (540.6) | ||||
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- Definition Amount of decrease to equity for grantee's tax withholding obligation for award under share-based payment arrangement. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after tax of other comprehensive income (loss) attributable to parent entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Value of stock issued as a result of the exercise of stock options. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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