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Earnings Per Share ("EPS"): (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Net Income |  |  |  |
Income From Continuing Operations | $ 20.1 | $ 15.3 | $ 29.2 | $ 17.3
(Loss) income from discontinued operations | 0 | (7.5) | 0 | (6.1)
Net Income | $ 20.1 | $ 7.8 | $ 29.2 | $ 11.2
Weighted Average Common Shares |  |  |  |
Income from Continuing Operations, Basic (in shares) | 42.7 | 42.3 | 42.7 | 42.1
Income from discontinued operations, Basic (in shares) | 42.7 | 42.3 | 42.7 | 42.1
Effect of Dilutive Securities (in shares) | 0.3 | 0.5 | 0.3 | 0.4
Income from Continuing Operations, Diluted (in shares) | 43.0 | 42.8 | 43.0 | 42.5
Income from discontinued operations, Diluted (in shares) | 43.0 | 42.8 | 43.0 | 42.5
Per Common Share Amount, Basic |  |  |  |
Income from continuing operations (in dollars per share) | $ 0.47 | $ 0.36 | $ 0.68 | $ 0.41
Income from discontinued operations (in dollars per share) |  | $ (0.18) |  | $ (0.14)
Net income (in dollars per share) | $ 0.47 | $ 0.18 | $ 0.68 | $ 0.27
Per Common Share Amount, Diluted |  |  |  |
Income from continuing operations (in dollars per share) | $ 0.47 | $ 0.36 | $ 0.68 | $ 0.41
Income from discontinued operations (in dollars per share) |  | $ (0.18) |  | $ (0.15)
Net income (in dollars per share) | $ 0.47 | $ 0.18 | $ 0.68 | $ 0.26
Stock options |  |  |  |
Earnings Per Share ("EPS") |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 0.4 | 0.2 | 0.2 | 0.5

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