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Shareholder Rights Agreement (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Details
Number of preferred stock purchase rights attached to each outstanding share of common stock	one
Number of Series A Junior Participating Preferred Stock Each Right Entitles the Holder to Purchase	one one-hundredth
Purchase price of the preferred stock per right	$ 75us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Minimum percentage of outstanding common stock to be acquired to Trigger Rights Exchange for Common Stock	10 percent

X

- Definition

Represents the minimum percentage of outstanding common stock to be acquired to trigger rights exchanged for common stock.

+ References

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- Definition

Number of preferred stock purchase rights attached to each outstanding share of the Entity's common stock.

+ References

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- Definition

Represents the number of Series A Junior Participating Preferred Stock each right entitles the holder to purchase from the Company per the Entity's shareholder rights agreement.

+ References

No definition available.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(4))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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