Stockholder's Equity (Details) (USD $)	9 Months Ended
Sep. 30, 2011	Dec. 31, 2010
Class of Stock [Line Items]
Number of rights per common share	1
Preferred stock, par value	$ 0.01	$ 0.01
Rights expiration date	Sep. 06, 2021
Minimum percentage of assets or earning power sold	50.00%
Minimum percentage of equity ownership	10.00%
Maximum percentage of equity ownership	50.00%
Redemption price per right	$ 0.01
Series A Junior Participating Preferred Stock [Member]
Class of Stock [Line Items]
Number of share per right	0.001
Preferred stock, par value	$ 0.01
Purchase price per right entitled share	$ 45.00
Rights, exchange ratio	0.001
Common Stock [Member]
Class of Stock [Line Items]
Rights, exchange ratio	1

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- Definition

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- Definition

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- Definition

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- Definition

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The specified number of securities that each class of warrants or rights outstanding give the holder the right but not the obligation to purchase from the issuer at a specific price, on or before a certain date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 4

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- 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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