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Consolidated Balance Sheets (Paranthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Stockholders' equity
Preferred shares, par value	$ 1.00	$ 1.00
Common shares, par value	$ 0.01	$ 0.01

- 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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