SHARE-BASED COMPENSATION - RSUs with Market Conditions (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Share-based Compensation Restricted Stock Units With Market Conditions [Line Items]
RSUs issued	645,601
Reconciliation Of RSUs With Market Conditions [Abstract]
RSUs beginning	1,258,685
Number of RSUs granted	645,601
Number of RSUs forfeited	(13,499)
Number of RSUs vested	(336,229)
RSUs ending	1,554,558	1,258,685
Net RSUs increase (decrease) to APIC	$ 1,111	$ 5,232
Restricted Stock Units With Market Conditions [Member]
Share-based Compensation Restricted Stock Units With Market Conditions [Line Items]
RSUs issued	165,000	290,000
Reconciliation Of RSUs With Market Conditions [Abstract]
RSUs beginning	290,000
Number of RSUs granted	165,000	290,000
Number of RSUs forfeited	0	0
Number of RSUs vested	(193,000)	0
RSUs ending	262,000	290,000
Fair value of each RSU issued with market conditions	$ 8.39	$ 6.9

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ 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 (c)(1)(iv)(3)

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-Publisher FASB

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- Definition

Per share weighted average intrinsic value of equity-based compensation awards granted. Excludes stock and unit options.

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-Publisher FASB

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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-Publisher FASB

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Value of stock related to Restricted Stock Awards issued during the period, net of the stock value of such awards forfeited.

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