FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair Value Hierarchy (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014 item	Mar. 31, 2015
Liabilities
Warrants	$ 366,080us-gaap_WarrantsAndRightsOutstanding	$ 474,890us-gaap_WarrantsAndRightsOutstanding
Interest rate swaps	3,144	3,307
Number of registered money market mutual funds in cash equivalents	2
Fair Value, Measurements, Recurring [Member] \| Estimate of Fair Value Measurement [Member]
Assets:
Cash equivalents	75,027	110,077
Liabilities
Warrants	366,080	474,890
Interest rate swaps	3,144	3,307
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets:
Cash equivalents	75,027	110,077
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Liabilities
Interest rate swaps	3,144	3,307
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Liabilities
Warrants	$ 366,080	$ 474,890

Represents the number of registered money market mutual funds in cash equivalents.

No definition available.

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- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016

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- Definition

Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611

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- Definition

Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

+ 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))

-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

-Article 4

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