RESTRUCTURING CHARGES - Narrative (Details) $ in Thousands	3 Months Ended	6 Months Ended
Sep. 30, 2018 USD ($) position	Sep. 30, 2018 USD ($) position
Restructuring and Related Activities [Abstract]
Number of positions eliminated \| position	66	66
Severance costs \| $	$ 3,600	$ 3,607

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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