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, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Dividends, Share Repurchases, Earning Per Share and Accumulated Other Comprehensive Income [Abstract]
Loss available to common stockholders	$ (31,209)	$ (29,797)	$ (86,484)	$ (70,569)
Weighted average number of common shares outstanding – basic	35,317,935	35,070,047	35,253,688	35,012,014
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	35,317,935	35,070,047	35,253,688	35,012,014
Basic loss per common share (in dollars per share)	$ (0.88)	$ (0.85)	$ (2.45)	$ (2.02)
Diluted loss per common share (in dollars per share)	$ (0.88)	$ (0.85)	$ (2.45)	$ (2.02)