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FAIR VALUE OF FINANCIAL INSTRUMENTS Narrative (Details) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Dec. 31, 2019
Mar. 31, 2019
Level 2 fair value measurements    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Estimated fair value of debt $ 162.9 $ 160.3