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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($) $ in Millions | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Treasury Stock | Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2023 |  | 42,352,001 |  |  |  |
Beginning balance at Dec. 31, 2023 | $ 3,244.1 | $ 0.4 | $ 1,288.4 | $ 2,961.5 | $ (1,067.3) | $ 61.1
Treasury stock, beginning balance (in shares) at Dec. 31, 2023 |  |  |  |  | 22,018,537 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 147.1 |  |  | 147.1 |  |
Change in fair value of cash flow swaps, net of reclassification adjustment | 7.5 |  |  |  |  | 7.5
Unrealized gain on changes in fair value of debt securities, net of reclassification adjustment and tax expense | (2.2) |  |  |  |  | (2.2)
Comprehensive income | 152.4 |  |  | 147.1 |  | 5.3
Share-based compensation | 10.5 |  | 10.5 |  |  |
Issuance of common stock, net of forfeitures in connection with share-based payment arrangements (in shares) |  | 123,845 |  |  |  |
Shares repurchased (in shares) |  |  |  |  | 239,790 |
Share repurchases | (50.4) |  |  |  | $ (50.4) |
Repurchase of common stock associated with net share settlements of employee share-based awards (in shares) |  |  |  |  | 45,399 |
Repurchase of common stock associated with net share settlement of employee share-based awards | (9.8) |  |  |  | $ (9.8) |
Repurchase and retirement of common stock (in shares) |  | (239,790) |  |  | (239,790) |
Retirement of common stock | 0.0 |  | (2.9) | (47.1) | $ 50.0 |
Ending balance (in shares) at Mar. 31, 2024 |  | 42,236,056 |  |  |  |
Ending balance at Mar. 31, 2024 | 3,346.9 | $ 0.4 | 1,296.1 | 3,061.5 | $ (1,077.5) | 66.4
Treasury stock, ending balance (in shares) at Mar. 31, 2024 |  |  |  |  | 22,063,936 |
Beginning balance (in shares) at Dec. 31, 2023 |  | 42,352,001 |  |  |  |
Beginning balance at Dec. 31, 2023 | 3,244.1 | $ 0.4 | 1,288.4 | 2,961.5 | $ (1,067.3) | 61.1
Treasury stock, beginning balance (in shares) at Dec. 31, 2023 |  |  |  |  | 22,018,537 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 301.5 |  |  |  |  |
Comprehensive income | $ 290.9 |  |  |  |  |
Repurchase and retirement of common stock (in shares) | (826,340) | (393,951) |  |  | (393,951) |
Retirement of common stock | $ 0.0 |  | (4.8) | (84.1) | $ 88.9 |
Ending balance (in shares) at Sep. 30, 2024 |  | 41,652,707 |  |  |  |
Ending balance at Sep. 30, 2024 | 3,362.4 | $ 0.4 | 1,299.7 | 3,090.9 | $ (1,079.1) | 50.5
Treasury stock, ending balance (in shares) at Sep. 30, 2024 |  |  |  |  | 22,065,248 |
Beginning balance (in shares) at Mar. 31, 2024 |  | 42,236,056 |  |  |  |
Beginning balance at Mar. 31, 2024 | 3,346.9 | $ 0.4 | 1,296.1 | 3,061.5 | $ (1,077.5) | 66.4
Treasury stock, beginning balance (in shares) at Mar. 31, 2024 |  |  |  |  | 22,063,936 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 28.1 |  |  | 28.1 |  |
Change in fair value of cash flow swaps, net of reclassification adjustment | (0.4) |  |  |  |  | (0.4)
Unrealized gain on changes in fair value of debt securities, net of reclassification adjustment and tax expense | (1.3) |  |  |  |  | (1.3)
Comprehensive income | 26.4 |  |  | 28.1 |  | (1.7)
Share-based compensation | 5.7 |  | 5.7 |  |  |
Issuance of common stock, net of forfeitures in connection with share-based payment arrangements (in shares) |  | 841 |  |  |  |
Shares repurchased (in shares) |  |  |  |  | 192,599 |
Share repurchases | (48.2) |  |  |  | $ (48.2) |
Repurchase of common stock associated with net share settlements of employee share-based awards (in shares) |  |  |  |  | 262 |
Repurchase of common stock associated with net share settlement of employee share-based awards | (0.1) |  |  |  | $ (0.1) |
Repurchase and retirement of common stock (in shares) |  | (192,599) |  |  | (192,599) |
Retirement of common stock | 0.0 |  | (2.3) | (40.9) | $ 43.2 |
Ending balance (in shares) at Jun. 30, 2024 |  | 42,044,298 |  |  |  |
Ending balance at Jun. 30, 2024 | 3,330.7 | $ 0.4 | 1,299.5 | 3,048.7 | $ (1,082.5) | 64.7
Treasury stock, ending balance (in shares) at Jun. 30, 2024 |  |  |  |  | 22,064,198 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 126.3 |  |  | 126.3 |  |
Change in fair value of cash flow swaps, net of reclassification adjustment | (21.9) |  |  |  |  | (21.9)
Unrealized gain on changes in fair value of debt securities, net of reclassification adjustment and tax expense | 7.7 |  |  |  |  | 7.7
Comprehensive income | 112.1 |  |  | 126.3 |  | (14.2)
Share-based compensation | 5.0 |  | 5.0 |  |  |
Issuance of common stock, net of forfeitures in connection with share-based payment arrangements (in shares) |  | 2,360 |  |  |  |
Share repurchases | (85.2) |  |  |  | $ (85.2) |
Repurchase of common stock associated with net share settlements of employee share-based awards (in shares) |  |  |  |  | 1,050 |
Repurchase of common stock associated with net share settlement of employee share-based awards | (0.2) |  |  |  | $ (0.2) |
Repurchase and retirement of common stock (in shares) |  |  |  |  | (393,951) |
Ending balance (in shares) at Sep. 30, 2024 |  | 41,652,707 |  |  |  |
Ending balance at Sep. 30, 2024 | 3,362.4 | $ 0.4 | 1,299.7 | 3,090.9 | $ (1,079.1) | 50.5
Treasury stock, ending balance (in shares) at Sep. 30, 2024 |  |  |  |  | 22,065,248 |
Beginning balance (in shares) at Dec. 31, 2024 |  | 41,649,426 |  |  |  |
Beginning balance at Dec. 31, 2024 | $ 3,502.1 | $ 0.4 | 1,305.1 | 3,218.9 | $ (1,079.2) | 56.8
Treasury stock, beginning balance (in shares) at Dec. 31, 2024 | 22,065,478 |  |  |  | 22,065,478 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | $ 132.1 |  |  | 132.1 |  |
Change in fair value of cash flow swaps, net of reclassification adjustment | (10.3) |  |  |  |  | (10.3)
Unrealized gain on changes in fair value of debt securities, net of reclassification adjustment and tax expense | 3.0 |  |  |  |  | 3.0
Comprehensive income | 124.9 |  |  | 132.1 |  | (7.2)
Share-based compensation | 9.1 |  | 9.1 |  |  |
Issuance of common stock, net of forfeitures in connection with share-based payment arrangements (in shares) |  | 117,992 |  |  |  |
Repurchase of common stock associated with net share settlements of employee share-based awards (in shares) |  |  |  |  | 42,780 |
Repurchase of common stock associated with net share settlement of employee share-based awards | (12.5) |  |  |  | $ (12.5) |
Ending balance (in shares) at Mar. 31, 2025 |  | 41,767,418 |  |  |  |
Ending balance at Mar. 31, 2025 | 3,623.5 | $ 0.4 | 1,314.2 | 3,351.0 | $ (1,091.7) | 49.6
Treasury stock, ending balance (in shares) at Mar. 31, 2025 |  |  |  |  | 22,108,258 |
Beginning balance (in shares) at Dec. 31, 2024 |  | 41,649,426 |  |  |  |
Beginning balance at Dec. 31, 2024 | $ 3,502.1 | $ 0.4 | 1,305.1 | 3,218.9 | $ (1,079.2) | 56.8
Treasury stock, beginning balance (in shares) at Dec. 31, 2024 | 22,065,478 |  |  |  | 22,065,478 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | $ 432.0 |  |  |  |  |
Comprehensive income | $ 417.4 |  |  |  |  |
Repurchase and retirement of common stock (in shares) | (220,587) |  |  |  |  |
Ending balance (in shares) at Sep. 30, 2025 |  | 41,550,096 |  |  |  |
Ending balance at Sep. 30, 2025 | $ 3,878.0 | $ 0.4 | 1,323.7 | 3,603.5 | $ (1,092.0) | 42.3
Treasury stock, ending balance (in shares) at Sep. 30, 2025 | 22,109,547 |  |  |  | 22,109,547 |
Beginning balance (in shares) at Mar. 31, 2025 |  | 41,767,418 |  |  |  |
Beginning balance at Mar. 31, 2025 | $ 3,623.5 | $ 0.4 | 1,314.2 | 3,351.0 | $ (1,091.7) | 49.6
Treasury stock, beginning balance (in shares) at Mar. 31, 2025 |  |  |  |  | 22,108,258 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 152.8 |  |  | 152.8 |  |
Change in fair value of cash flow swaps, net of reclassification adjustment | (6.3) |  |  |  |  | (6.3)
Unrealized gain on changes in fair value of debt securities, net of reclassification adjustment and tax expense | 1.0 |  |  |  |  | 1.0
Comprehensive income | 147.5 |  |  | 152.8 |  | (5.3)
Share-based compensation | 6.2 |  | 6.2 |  |  |
Issuance of common stock, net of forfeitures in connection with share-based payment arrangements (in shares) |  | 1,548 |  |  |  |
Repurchase of common stock associated with net share settlements of employee share-based awards (in shares) |  |  |  |  | 646 |
Repurchase of common stock associated with net share settlement of employee share-based awards | (0.2) |  |  |  | $ (0.2) |
Ending balance (in shares) at Jun. 30, 2025 |  | 41,768,966 |  |  |  |
Ending balance at Jun. 30, 2025 | 3,777.0 | $ 0.4 | 1,320.4 | 3,503.7 | $ (1,091.8) | 44.3
Treasury stock, ending balance (in shares) at Jun. 30, 2025 |  |  |  |  | 22,108,904 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 147.1 |  |  | 147.1 |  |
Change in fair value of cash flow swaps, net of reclassification adjustment | (3.8) |  |  |  |  | (3.8)
Unrealized gain on changes in fair value of debt securities, net of reclassification adjustment and tax expense | 1.8 |  |  |  |  | 1.8
Comprehensive income | 145.1 |  |  | 147.1 |  | (2.0)
Share-based compensation | 6.0 |  | 6.0 |  |  |
Issuance of common stock, net of forfeitures in connection with share-based payment arrangements (in shares) |  | 1,717 |  |  |  |
Shares repurchased (in shares) |  |  |  |  | 220,587 |
Share repurchases | (50.0) |  |  |  | $ (50.0) |
Repurchase of common stock associated with net share settlements of employee share-based awards (in shares) |  |  |  |  | 643 |
Repurchase of common stock associated with net share settlement of employee share-based awards | $ (0.2) |  |  |  | $ (0.2) |
Repurchase and retirement of common stock (in shares) | (220,587) | (220,587) |  |  | (220,587) |
Retirement of common stock | $ 0.0 |  | (2.7) | (47.3) | $ 50.0 |
Ending balance (in shares) at Sep. 30, 2025 |  | 41,550,096 |  |  |  |
Ending balance at Sep. 30, 2025 | $ 3,878.0 | $ 0.4 | $ 1,323.7 | $ 3,603.5 | $ (1,092.0) | $ 42.3
Treasury stock, ending balance (in shares) at Sep. 30, 2025 | 22,109,547 |  |  |  | 22,109,547 |

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