EARNINGS PER SHARE AND ACCUMULATED OTHER COMPREHENSIVE INCOME - Computation of Basic and Diluted EPS (Details)	3 Months Ended		9 Months Ended
	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares
Dividends, Share Repurchases, Earning Per Share and Accumulated Other Comprehensive Income [Abstract]
Loss available to common stockholders – basic | $	$ (85,944,000)	$ (8,273,000)	$ (262,242,000)	$ (94,757,000)
Interest expense on assumed conversion of 4½% Convertible Senior Notes, net of tax (1) | $	0	0	0	0
Loss available to common stockholders – diluted | $	$ (85,944,000)	$ (8,273,000)	$ (262,242,000)	$ (94,757,000)
Weighted average number of common shares outstanding – basic | shares	35,798,185	35,368,212	35,712,735	35,260,746
Assumed conversion of 4½% Convertible Senior Notes outstanding during period (1) | shares	0	0	0	0
Net effect of dilutive stock options and restricted stock awards based on the treasury stock method | shares	0	0	0	0
Weighted average number of common shares outstanding – diluted | shares	35,798,185	35,368,212	35,712,735	35,260,746
Basic loss per common share (in dollars per share) | $ / shares	$ (2.40)	$ (0.23)	$ (7.34)	$ (2.69)
Diluted loss per common share (in dollars per share) | $ / shares	(2.40)	$ (0.23)	(7.34)	$ (2.69)
Convertible Debt | 4½% Convertible Senior Notes due 2023
Debt Instrument [Line Items]
Debt Instrument, Convertible, Conversion Price | $ / shares	$ 15.64		$ 15.64
Debt Instrument, Convertible, Conversion Ratio			63.9488
Debt Instrument, Convertible, Conversion Per Principal Amount | $			$ 1,000