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 | |