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Treasury Stock (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended | 60 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 21, 2016 | Feb. 29, 2016 | Sep. 30, 2010 | Aug. 31, 2015 | Dec. 16, 2015 | Jul. 22, 2015 | May. 31, 2015 | Feb. 28, 2015 | Oct. 01, 2009
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Authorized stock purchase amount |  |  | $ 44.0 | [1] |  | $ 200.0 |  |  |  | $ 200.0
Common Stock, par value per share (in Dollars per share) |  | $ 0.01 |  |  |  |  |  | $ 0.01 | $ 0.01 |
Treasury stock acquired (in shares) |  |  | 5,199,699 |  |  |  |  |  |  |
Treasury stock acquired (in dollars per sahre) |  |  | $ 30.00 |  |  |  |  |  |  |
Increase in authorized amount of stock to be repurchased |  |  |  |  |  |  | $ 50.0 |  |  |
Treasury stock acquired |  | $ 7.0 | $ 156.0 |  | $ 41.1 |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Repurchase offer price (in dollars per share) | $ 40.00 |  |  |  |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Repurchase offer price (in dollars per share) | $ 37.00 |  |  |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Common Stock, par value per share (in Dollars per share) |  | $ 0.01 |  |  |  |  |  |  |  |
[1] | Represents the remainder of a $200.0 authorization after giving effect to the purchase of 5,199,699 shares at $30.00 per share pursuant to a large share repurchase in the form of a modified Dutch Auction tender offer that was completed by the Company on November 3, 2010 for a total cost of $156.0, excluding related fees and expenses.

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