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Share Repurchase Programs (Details) (USD $) In Millions, except Share data, unless otherwise specified		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2013 December 2011 Anti-Dilutive Share Repurchase Program [Member]	Sep. 30, 2012 December Two Thousand Eleven Anti Dilutive Share Repurchase Program [Member] [Member]	Sep. 30, 2012 December Two Thousand Eleven Anti Dilutive Share Repurchase Program [Member] [Member]	Sep. 30, 2012 Common Stock [Member]	Sep. 30, 2012 Common Stock [Member]
Accelerated Share Repurchases [Line Items]
Maximum number of share repurchases authorization	2,000,000
Repurchased and retired shares				87,223	543,923
Aggregate cost of repurchased and retired		$ 3.5	$ 26.3

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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