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Consolidated Statements Shareholders' Equity - USD ($) $ in Millions | Total | Class A Common Shares | Class B Common Stock | Common Stock | Additional Paid-In Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Treasury Stock
--- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2022 | $ 2,837.2 |  |  | $ 0.0 | $ 1,584.4 | $ 1,257.8 | $ (5.0) | $ 0.0
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income | 98.0 |  |  | 0.0 | 0.0 | 98.0 | 0.0 | 0.0
Other comprehensive (loss) income | 0.8 |  |  | 0.0 | 0.0 | 0.0 | 0.8 | 0.0
Share-based compensation expense | 5.1 |  |  | 0.0 | 5.1 | 0.0 | 0.0 | 0.0
Dividends declared per share |  | $ 0.09 | $ 0.09 |  |  |  |  |
Dividends declared | (16.4) |  |  | 0.0 | 0.0 | (16.4) | 0.0 | 0.0
Share issuances | 0.1 |  |  | 0.0 | 0.1 | 0.0 | 0.0 | 0.0
Exercise of employee stock options | 0.1 |  |  | 0.0 | 0.1 | 0.0 | 0.0 | 0.0
Shares withheld for employee taxes | (6.1) |  |  | 0.0 | (6.1) | 0.0 | 0.0 | 0.0
Balance at Mar. 31, 2023 | 2,918.8 |  |  | 0.0 | 1,583.6 | 1,339.4 | (4.2) | 0.0
Balance at Dec. 31, 2022 | 2,837.2 |  |  | 0.0 | 1,584.4 | 1,257.8 | (5.0) | 0.0
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income | 211.1 |  |  |  |  |  |  |
Balance at Sep. 30, 2023 | 2,957.1 |  |  | 0.0 | 1,592.8 | 1,420.3 | (5.0) | (51.0)
Balance at Mar. 31, 2023 | 2,918.8 |  |  | 0.0 | 1,583.6 | 1,339.4 | (4.2) | 0.0
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income | 77.5 |  |  | 0.0 | 0.0 | 77.5 | 0.0 | 0.0
Other comprehensive (loss) income | (0.1) |  |  | 0.0 | 0.0 | 0.0 | (0.1) | 0.0
Share-based compensation expense | 4.4 |  |  | 0.0 | 4.4 | 0.0 | 0.0 | 0.0
Dividends declared per share |  | 0.09 | 0.09 |  |  |  |  |
Dividends declared | (16.1) |  |  | 0.0 | 0.0 | (16.1) | 0.0 | 0.0
Repurchases of common stock | (36.1) |  |  | 0.0 | 0.0 | 0.0 | 0.0 | (36.1)
Balance at Jun. 30, 2023 | 2,948.4 |  |  | 0.0 | 1,588.0 | 1,400.8 | (4.3) | (36.1)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income | 35.6 |  |  | 0.0 | 0.0 | 35.6 | 0.0 | 0.0
Other comprehensive (loss) income | (0.7) |  |  | 0.0 | 0.0 | 0.0 | (0.7) | 0.0
Share-based compensation expense | 4.8 |  |  | 0.0 | 4.8 | 0.0 | 0.0 | 0.0
Dividends declared per share |  | 0.09 | 0.09 |  |  |  |  |
Dividends declared | (16.1) |  |  | 0.0 | 0.0 | (16.1) | 0.0 | 0.0
Repurchases of common stock | (14.9) |  |  | 0.0 | 0.0 | 0.0 | 0.0 | (14.9)
Balance at Sep. 30, 2023 | 2,957.1 |  |  | 0.0 | 1,592.8 | 1,420.3 | (5.0) | (51.0)
Balance at Dec. 31, 2023 | 2,956.8 |  |  | 0.0 | 1,595.2 | 1,431.9 | (3.4) | (66.9)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income | 18.5 |  |  | 0.0 | 0.0 | 18.5 | 0.0 | 0.0
Other comprehensive (loss) income | (0.2) |  |  | 0.0 | 0.0 | 0.0 | (0.2) | 0.0
Share-based compensation expense | 1.5 |  |  | 0.0 | 1.5 | 0.0 | 0.0 | 0.0
Dividends declared per share |  | 0.095 | 0.095 |  |  |  |  |
Dividends declared | (16.7) |  |  | 0.0 | 0.0 | (16.7) | 0.0 | 0.0
Repurchases of common stock | (13.0) |  |  | 0.0 | 0.0 | 0.0 | 0.0 | (13.0)
Exercise of employee stock options | 1.5 |  |  | 0.0 | 1.5 | 0.0 | 0.0 | 0.0
Shares withheld for employee taxes | (6.4) |  |  | 0.0 | (6.4) | 0.0 | 0.0 | 0.0
Balance at Mar. 31, 2024 | 2,942.0 |  |  | 0.0 | 1,591.8 | 1,433.7 | (3.6) | (79.9)
Balance at Dec. 31, 2023 | 2,956.8 |  |  | 0.0 | 1,595.2 | 1,431.9 | (3.4) | (66.9)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income | 84.4 |  |  |  |  |  |  |
Balance at Sep. 30, 2024 | 2,967.2 |  |  | 0.0 | 1,600.5 | 1,466.0 | (2.9) | (96.4)
Balance at Mar. 31, 2024 | 2,942.0 |  |  | 0.0 | 1,591.8 | 1,433.7 | (3.6) | (79.9)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income | 35.3 |  |  | 0.0 | 0.0 | 35.3 | 0.0 | 0.0
Other comprehensive (loss) income | (0.3) |  |  | 0.0 | 0.0 | 0.0 | (0.3) | 0.0
Share-based compensation expense | 4.3 |  |  | 0.0 | 4.3 | 0.0 | 0.0 | 0.0
Dividends declared per share |  | 0.095 | 0.095 |  |  |  |  |
Dividends declared | (16.9) |  |  | 0.0 | 0.0 | (16.9) | 0.0 | 0.0
Repurchases of common stock | (12.8) |  |  | 0.0 | 0.0 | 0.0 | 0.0 | (12.8)
Balance at Jun. 30, 2024 | 2,951.6 |  |  | 0.0 | 1,596.1 | 1,452.1 | (3.9) | (92.7)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income | 30.6 |  |  | 0.0 | 0.0 | 30.6 | 0.0 | 0.0
Other comprehensive (loss) income | 1.0 |  |  | 0.0 | 0.0 | 0.0 | 1.0 | 0.0
Share-based compensation expense | 4.4 |  |  | 0.0 | 4.4 | 0.0 | 0.0 | 0.0
Dividends declared per share |  | $ 0.095 | $ 0.095 |  |  |  |  |
Dividends declared | (16.7) |  |  | 0.0 | 0.0 | (16.7) | 0.0 | 0.0
Repurchases of common stock | (3.7) |  |  | 0.0 | 0.0 | 0.0 | 0.0 | (3.7)
Balance at Sep. 30, 2024 | $ 2,967.2 |  |  | $ 0.0 | $ 1,600.5 | $ 1,466.0 | $ (2.9) | $ (96.4)

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