EARNINGS PER SHARE AND ACCUMULATED OTHER COMPREHENSIVE INCOME - Computation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Dividends, Share Repurchases, Earning Per Share and Accumulated Other Comprehensive Income [Abstract]
Loss available to common stockholders – basic	$ (162,974)	$ (143,947)	$ (332,220)	$ (175,811)
Loss available to common stockholders – diluted	$ (162,974)	$ (143,947)	$ (332,220)	$ (175,811)
Weighted average number of common shares outstanding – basic	35,918,916	35,768,232	35,918,916	35,685,388
Net effect of dilutive stock options and restricted stock awards based on the treasury stock method	0	0	0	0
Weighted average number of common shares outstanding – diluted	35,918,916	35,768,232	35,918,916	35,685,388
Basic loss per common share (in dollars per share)	$ (4.54)	$ (4.02)	$ (9.25)	$ (4.93)
Diluted loss per common share (in dollars per share)	$ (4.54)	$ (4.02)	$ (9.25)	$ (4.93)