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Stockholders' Rights Plan (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Stockholders' Rights Plan (Details)
Initial per share purchase price of preferred stock under Rights Plan	$ 50
Preferred stock, par value	$ 0.01	$ 0.01
Per share purchase price of preferred stock under Rights Plan	$ 100

- Definition

Face amount or stated value per share of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer); generally not indicative of the fair market value per share.

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