Earnings per Share Earnings per Share (Textuals) (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Earnings Per Share [Abstract]
Convertible Subordinated Debt	$ 57,500,000	$ 57,500,000		$ 0
Debt Instrument, Convertible, Conversion Ratio	42.0159
Debt Instrument Convertible Principal Amount Used In Conversion Rate Calculation	1,000	1,000
Debt Instrument, Convertible, Conversion Price	$ 23.80	$ 23.80
Stock Issued During Period, Shares, Other	2.4
Stock Issued During Period, Shares, New Issues	2.53
StockIssuedDuringPeriodPricePerShare	$ 17.63
Proceeds from Issuance of Common Stock	$ 42,100,000	$ 42,085,000	$ 0

Including the current and noncurrent portions, the carrying value of convertible subordinated debt, as of the balance sheet date, initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. This form of debt can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder, and places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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The ratio applied to the debt for purposes of determining the number of shares of the equity security into which the debt will be converted.

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- Definition

The cash inflow from the additional capital contribution to the entity.

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- Definition

Number of new stock issued during the period.

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