LONG-TERM DEBT - Schedule of Long-Term Debt - Additional Information (Details)	Mar. 31, 2017	Mar. 11, 2015
4.50% Convertible Senior Notes due 2020
Long-term debt
Debt instrument interest rate	4.50%	4.50%

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

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