LOSS PER SHARE AND STOCKHOLDERS’ EQUITY: Reconciliation of basic and diluted earnings (loss) per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
EARNINGS (LOSS) PER SHARE AND STOCKHOLDERS' EQUITY [Abstract]
Net loss	$ (11,725)	$ (38,040)	$ (57,421)	$ (120,382)
Basic loss per share
Basic weighted-average shares outstanding (in shares)	66,523	67,473	66,034	68,021
Basic earnings (loss) per share (in USD per share)	$ (0.18)	$ (0.56)	$ (0.87)	$ (1.77)
Diluted earnings (loss) per share:
Basic weighted-average shares outstanding (in shares)	66,523	67,473	66,034	68,021
Dilutive effect of common stock options, warrants, and restricted stock as computed under the treasury stock method (in shares)	0	0	0	0
Diluted weighted-average shares outstanding (in shares)	66,523	67,473	66,034	68,021
Diluted earnings (loss) per share (in USD per share)	$ (0.18)	$ (0.56)	$ (0.87)	$ (1.77)