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Equity (Parenthetical) (Details) ($25 Par Preferred Stock [Member], USD $)	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
$25 Par Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Par Value	$ 25	$ 25	$ 25

- 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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