Stockholder Protection Rights Plan (Details) (USD $)	12 Months Ended
Dec. 31, 2014 Right
Stockholder Protection Rights Plan [Abstract]
Number of right for each outstanding share	1
Proportion of right entitles to purchase series A preferred stock	1/10,000th
Rights exercise price (in dollars per share)	$ 30
Number of business days after announcement rights are not exercisable for certain persons	10 days
Beneficial ownership percentage of company outstanding shares of common stock by acquiring person (in hundredths)	15.00%
Percentage of company outstanding shares of common stock by acquiring person (in hundredths)	50.00%

Beneficial ownership percentage of company outstanding shares of common stock by acquiring person.

No definition available.

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- Definition

The Rights are generally not exercisable for certain business days after an announcement by the Company that a person or group of affiliated persons (an "Acquiring Person") has acquired certain beneficial ownership.

+ References

No definition available.

+ Details

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- Definition

Directors declared a distribution of certain right ("Rights") for each outstanding share of the Company's common stock to stockholders of record at the close of business.

+ References

No definition available.

+ Details

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- Definition

Percentage of company outstanding shares of common stock by acquiring person.

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No definition available.

+ Details

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- Definition

Each Right entitles the registered holder to purchase from the Company on certain proportion of a share of Series A Junior Participating Preferred Stock.

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No definition available.

+ Details

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- Details

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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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Subparagraph 4

-Article 4

+ Details

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