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Rights Agreement (Details) (USD $)	12 Months Ended
Rights Agreement (Details) (USD $)	Jan. 28, 2012
Disclosure Text Block Supplement [Abstract]
Preferred Stock, Participation Rights	1/100
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 200
Equity Method Investment, Ownership Percentage	20.00%
Preferred Stock, Redemption Price Per Share	$ 0.01

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer.

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