ACCUMULATED OTHER COMPREHENSIVE LOSS - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Reclassification
Net gains reclassified from AOCI	$ (42,492)	$ 19,391	$ (2,045)
Unrealized Gain (Loss) on Derivative Instruments And Other
Reclassification
Net gains reclassified from AOCI	(42,492)	18,987	$ (2,171)
Cost of sales \| Unrealized Gain (Loss) on Derivative Instruments And Other \| Reclassification out of accumulated other comprehensive income
Reclassification
Net gains reclassified from AOCI	$ 40,600	$ 20,800

Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=109228884&loc=d3e1436-108581

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