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v3.21.2

Condensed Consolidated Statement of Stockholders' Equity - USD ($) $ in Millions | Total | Cumulative Effect, Period of Adoption, Adjustment | Cumulative Effect, Period of Adoption, Adjusted Balance | Common Stock | Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance | Treasury Stock | Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance | Additional Paid-in Capital | Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjusted Balance | Retained Earnings | Retained Earnings Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance | Accumulated Other Comprehensive Loss, net | Accumulated Other Comprehensive Loss, net Cumulative Effect, Period of Adoption, Adjustment | Accumulated Other Comprehensive Loss, net Cumulative Effect, Period of Adoption, Adjusted Balance
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Sep. 30, 2019 | $ 594.2 | $ 0.0 | $ 594.2 | $ 0.2 | $ 0.2 | $ (50.1) | $ (50.1) | $ 276.8 | $ 276.8 | $ 402.1 | $ 0.7 | $ 402.8 | $ (34.8) | $ (0.7) | $ (35.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 92.2 |  |  |  |  |  |  |  |  | 92.2 |  |  |  |  |
Other comprehensive income (loss) | (2.7) |  |  |  |  |  |  |  |  |  |  |  | (2.7) |  |
Exercise of stock options | 5.2 |  |  |  |  |  |  | 5.2 |  |  |  |  |  |  |
Share-based compensation | 7.4 |  |  |  |  |  |  | 7.4 |  |  |  |  |  |  |
Repurchase of common stock | (7.5) |  |  |  |  | (7.5) |  |  |  |  |  |  |  |  |
Ending balance at Jun. 30, 2020 | 688.8 |  |  | 0.2 |  | (57.6) |  | 289.4 |  | 495.0 |  |  | (38.2) |  |
Beginning balance at Sep. 30, 2019 | 594.2 | 0.0 | 594.2 | 0.2 | 0.2 | (50.1) | (50.1) | 276.8 | 276.8 | 402.1 | 0.7 | 402.8 | (34.8) | $ (0.7) | (35.5)
Ending balance at Sep. 30, 2020 | $ 767.5 | (6.2) | 761.3 | 0.2 | 0.2 | (57.6) | (57.6) | 292.6 | 292.6 | 572.4 | (6.2) | 566.2 | (40.1) |  | (40.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounting Standards Update [Extensible List] | us-gaap:AccountingStandardsUpdate201613Member |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance at Mar. 31, 2020 | $ 648.6 |  |  | 0.2 |  | (57.6) |  | 285.8 |  | 458.4 |  |  | (38.2) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 36.6 |  |  |  |  |  |  |  |  | 36.6 |  |  |  |  |
Other comprehensive income (loss) | 0.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise of stock options | 1.2 |  |  |  |  |  |  | 1.2 |  |  |  |  |  |  |
Share-based compensation | 2.4 |  |  |  |  |  |  | 2.4 |  |  |  |  |  |  |
Ending balance at Jun. 30, 2020 | 688.8 |  |  | 0.2 |  | (57.6) |  | 289.4 |  | 495.0 |  |  | (38.2) |  |
Beginning balance at Sep. 30, 2020 | 767.5 | $ (6.2) | $ 761.3 | 0.2 | $ 0.2 | (57.6) | $ (57.6) | 292.6 | $ 292.6 | 572.4 | $ (6.2) | $ 566.2 | (40.1) |  | $ (40.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 109.0 |  |  |  |  |  |  |  |  | 109.0 |  |  |  |  |
Other comprehensive income (loss) | 16.3 |  |  |  |  |  |  |  |  |  |  |  | 16.3 |  |
Exercise of stock options | 7.6 |  |  |  |  |  |  | 7.6 |  |  |  |  |  |  |
Share-based compensation | 10.3 |  |  |  |  |  |  | 10.3 |  |  |  |  |  |  |
Repurchase of common stock | (3.1) |  |  |  |  | (3.1) |  |  |  |  |  |  |  |  |
Ending balance at Jun. 30, 2021 | 901.4 |  |  | 0.2 |  | (60.7) |  | 310.5 |  | 675.2 |  |  | (23.8) |  |
Beginning balance at Mar. 31, 2021 | 860.2 |  |  | 0.2 |  | (57.6) |  | 304.4 |  | 641.0 |  |  | (27.8) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 34.2 |  |  |  |  |  |  |  |  | 34.2 |  |  |  |  |
Other comprehensive income (loss) | 4.0 |  |  |  |  |  |  |  |  |  |  |  | 4.0 |  |
Exercise of stock options | 2.3 |  |  |  |  |  |  | 2.3 |  |  |  |  |  |  |
Share-based compensation | 3.8 |  |  |  |  |  |  | 3.8 |  |  |  |  |  |  |
Repurchase of common stock | (3.1) |  |  |  |  | (3.1) |  |  |  |  |  |  |  |  |
Ending balance at Jun. 30, 2021 | $ 901.4 |  |  | $ 0.2 |  | $ (60.7) |  | $ 310.5 |  | $ 675.2 |  |  | $ (23.8) |  |

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