Basis Of Presentation (Narrative) (Details)	0 Months Ended	3 Months Ended
Basis Of Presentation (Narrative) (Details)	Apr. 19, 2011	Mar. 31, 2012
Basis Of Presentation [Abstract]
Stock split, conversion ratio	2
Stock split, shares per common stock		Stock split – On April 19, 2011, our board of directors declared a two-for-one stock split with respect to our common stock. This stock split became effective at the close of business on May 20, 2011. All historical share and per share amounts in this report have been adjusted to reflect the impact of this stock split.

- Definition

Description of the stock split arrangement. Also provide the retroactive effect given by a stock split that occurs after the balance date but before the release of financial statements.

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