INCOME TAX: Earnings (Loss) Before Income Tax Attributable to U.S. and non-U.S. Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
U.S.	$ (37,415)	$ (122,257)	$ (160,457)
Non-U.S.	2,340	1,457	(5,080)
Loss before income taxes	$ (35,075)	$ (120,800)	$ (165,537)