FAIR VALUE DISCLOSURES - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018 USD ($) aircraft	Dec. 31, 2017 USD ($) aircraft	Dec. 31, 2018 USD ($) aircraft	Dec. 31, 2017 USD ($) aircraft
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment charges on aircraft held for sale	$ 1,350	$ 1,560	$ 1,350	$ 11,307
Number of aircraft impaired | aircraft	2	1	2	5
Bristow Academy [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment charges on aircraft held for sale				$ 6,500