STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE Share-based Compensation Plans Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Common stock reserved for future issuance (in shares)	4.6
Unrecognized share-based compensation expense	$ 16.4
Weighted-average term of unrecognized share-based compensation expense, Stock Options	2 years 4 months 2 days
Weighted-average term of unrecognized share-based compensation expense, Restricted Stock	1 year 11 months 16 days

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. For Restricted Stock only.

No definition available.

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- Definition

+ References

No definition available.

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- Definition

Number of common shares reserved for future issuance related to deferred compensation arrangements with individuals.

+ References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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