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Consolidated Statements of Shareholders’ Equity - USD ($) $ in Millions | Total | Common Stock [Member] | Treasury Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Loss [Member]
--- | --- | --- | --- | --- | --- | ---
Balances at beginning of period at Sep. 30, 2016 | $ 433.8 | $ 0.2 | $ (46.3) | $ 249.4 | $ 255.1 | $ (24.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 6.4 |  |  |  | 6.4 |
Other comprehensive income (loss) | 0.1 |  |  |  |  | 0.1
Excercise of stock options | 3.3 |  |  | 3.3 |  |
Share-based compensation | 6.3 |  |  | 6.3 |  |
Balances at end of period at Sep. 30, 2017 | 449.9 | 0.2 | (46.3) | 259.0 | 261.5 | (24.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 55.5 |  |  |  | 55.5 |
Other comprehensive income (loss) | (8.6) |  |  |  |  | (8.6)
Excercise of stock options | 1.9 |  |  | 1.9 |  |
Share-based compensation | 6.6 |  |  | 6.6 |  |
Balances at end of period at Sep. 30, 2018 | 505.3 | 0.2 | (46.3) | 267.5 | 317.0 | (33.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 85.1 |  |  |  | 85.1 |
Other comprehensive income (loss) | (1.7) |  |  |  |  | (1.7)
Excercise of stock options | 1.2 |  |  | 1.2 |  |
Share-based compensation | 8.1 |  |  | 8.1 |  |
Repurchase of stock | (3.8) |  | 3.8 |  |  |
Balances at end of period at Sep. 30, 2019 | $ 594.2 | $ 0.2 | $ (50.1) | $ 276.8 | $ 402.1 | $ (34.8)

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