VARIABLE INTEREST ENTITIES - Statements of Operations of VIEs (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Variable Interest Entity [Line Items]
Revenue	$ 367,894	$ 352,109
Net loss	(32,041)	(55,746)
Bristow Aviation Holdings Limited
Variable Interest Entity [Line Items]
Revenue	331,469	301,970
Operating income (loss)	7,364	(19,654)
Net loss	$ (69,021)	$ (79,169)