FAIR VALUE - Additional Information (Details) - Convertible Notes - 6.00% Convertible Senior Notes due 2020 - USD ($)	Sep. 26, 2015	Feb. 19, 2015
Debt Instrument [Line Items]
Fixed interest rate	6.00%	6.00%
Contingent obligation for the make-whole premiums	$ 0	$ 0

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant