BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - INTANGIBLE ASSETS AND ADVERTISING (Details) - USD ($)	12 Months Ended
Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Accounting Policies [Abstract]
Impairment of intangible assets	$ 0	$ 0	$ 0
Advertising expense	$ 173,947,000	$ 94,743,000	$ 132,990,000

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275

Name:	us-gaap_ImpairmentOfIntangibleAssetsFinitelived
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration