EARNINGS PER SHARE AND ACCUMULATED OTHER COMPREHENSIVE INCOME - Computation of Basic and Diluted EPS (Details)	3 Months Ended
	Jun. 30, 2018 USD ($) $ / shares shares	Jun. 30, 2017 USD ($) $ / shares shares
Dividends, Share Repurchases, Earning Per Share and Accumulated Other Comprehensive Income [Abstract]
Loss available to common stockholders – basic | $	$ (32,108,000)	$ (55,275,000)
Interest expense on assumed conversion of 4½% Convertible Senior Notes, net of tax (1) | $	0	0
Loss available to common stockholders – diluted | $	$ (32,108,000)	$ (55,275,000)
Weighted average number of common shares outstanding – basic | shares	35,629,741	35,227,434
Assumed conversion of 4½% Convertible Senior Notes outstanding during period (1) | shares	0	0
Net effect of dilutive stock options and restricted stock awards based on the treasury stock method | shares	0	0
Weighted average number of common shares outstanding – diluted | shares	35,629,741	35,227,434
Basic loss per common share (in dollars per share) | $ / shares	$ (0.90)	$ (1.57)
Diluted loss per common share (in dollars per share) | $ / shares	(0.90)	$ (1.57)
Convertible Debt | 4½% Convertible Senior Notes due 2023
Debt Instrument [Line Items]
Debt Instrument, Convertible, Conversion Price | $ / shares	$ 15.64
Debt Instrument, Convertible, Conversion Ratio	63.9488
Debt Instrument, Convertible, Conversion Per Principal Amount | $	$ 1,000