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Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 09, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024 | Jan. 26, 2023
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Treasury stock, shares |  | 7,500,000 |  | 7,500,000 |  | 6,700,000 |
Treasury stock, Cost basis |  | $ 314.5 |  | $ 314.5 |  | $ 264.1 |
Shares repurchased |  | 750,000 | 312,993 | 1,100,000 | 312,993 |  |
Excise tax |  |  |  | $ 0.4 |  |  |
2018 Stock Buyback Program [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Number of shares authorized for repurchase | 4,300,000 |  |  |  |  |  | 4,300,000
Stock repurchase expiration date | Dec. 31, 2026 |  |  |  |  |  |
Shares repurchased |  |  | 312,993 | 1,100,000 |  |  |
2018 Stock Buyback Program [Member] | Common Stock [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Shares purchased average cost per share |  |  | $ 46.72 | $ 54.58 |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Number of shares nonvested |  | 100,000 |  | 100,000 |  | 100,000 |

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