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CONVERTIBLE SENIOR NOTES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jul. 27, 2010
Convertible senior notes
Non-cash deferred financing amortization costs included in interest expense	$ 487us-gaap_AmortizationOfFinancingCosts
Predecessor
Convertible senior notes
Non-cash interest expense recognized		1,299us-gaap_AmortizationOfDebtDiscountPremium / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Non-cash deferred financing amortization costs included in interest expense		2,220us-gaap_AmortizationOfFinancingCosts / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Predecessor | 2010 Notes
Convertible senior notes
Proceeds from convertible debt			125,000us-gaap_ProceedsFromConvertibleDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Interest rate on convertible notes (as a percent)			5.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Effective interest rate on liability component (as a percent)		10.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Cash interest expense recognized		1,541us-gaap_InterestExpenseDebtExcludingAmortization / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Non-cash interest expense recognized		1,299us-gaap_AmortizationOfDebtDiscountPremium / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Non-cash deferred financing amortization costs included in interest expense		$ 177us-gaap_AmortizationOfFinancingCosts / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember

X

- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

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- Definition

Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense.

+ References

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-Publisher FASB

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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- Definition

Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

+ References

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The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

+ References

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

-Publisher FASB

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-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228



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