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Earnings Per Share and Capital Structure Stock Repurchase Plan (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | 9 Months Ended | 2 Months Ended | 3 Months Ended | ||||
|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2014
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Sep. 30, 2013
|
Sep. 30, 2014
|
Sep. 30, 2013
|
Mar. 07, 2014
March 8, 2013 Share Repurchase Program [Member]
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Mar. 08, 2013
March 8, 2013 Share Repurchase Program [Member]
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Sep. 30, 2014
February 7, 2014 Share Repurchase Program [Member]
|
Feb. 07, 2014
February 7, 2014 Share Repurchase Program [Member]
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 1,100,000 | 1,300,000 | 1,200,000 | 1,100,000 | ||||
| Stock Repurchase Program, Authorized Amount | $ 50 | $ 50 | ||||||
| Stock Repurchased and Retired During Period, Shares (in ones) | 75,203 | 311,177 | ||||||
| Stock Repurchased and Retired During Period, Value | 2.9 | 12.4 | ||||||
| Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ 37.6 | |||||||