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Consolidated Statements of Shareholders’ Equity - USD ($) $ in Millions | Total | Common Stock [Member] | Treasury Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock, Common [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Loss [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Balances at beginning of period at Sep. 30, 2014 | $ 345.4 | $ 0.2 | $ (17.5) | $ 229.6 |  | $ 144.7 | $ (11.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income | 55.7 |  |  |  |  | 55.7 |
Other comprehensive loss | (5.9) |  |  |  |  |  | (5.9)
Excercise of stock options | 3.0 |  |  | 3.0 |  |  |
Share-based compensation | 3.6 |  |  | 3.6 |  |  |
Repurchase of stock | (4.7) |  | (4.5) |  |  |  |
Repurchase of stock - adjustments to APIC |  |  |  | (0.2) |  |  |
Stock held in escrow for business combination |  |  |  | 4.8 | $ (4.8) |  |
Balances at end of period at Sep. 30, 2015 | 397.1 | 0.2 | (26.8) | 240.8 |  | 200.4 | (17.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income | 54.7 |  |  |  |  | 54.7 |
Other comprehensive loss | (7.1) |  |  |  |  |  | (7.1)
Excercise of stock options | 3.5 |  |  | 3.5 |  |  |
Share-based compensation | 5.1 |  |  | 5.1 |  |  |
Repurchase of stock | (19.5) |  | (19.5) |  |  |  |
Repurchase of stock - adjustments to APIC |  |  |  | 0.0 |  |  |
Balances at end 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 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)

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