STOCKHOLDERS' EQUITY: Qualified Employee Stock Purchase Plan (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Share-based compensation
Future expense for performance stock option units	$ 213,838
Employee Stock
Share-based compensation
Stock issued during period, ESPP (in shares) | shares	103,447
Shares issued, price per share (in dollars per share) | $ / shares	$ 41.44
Stock issued during period, ESPP, value	$ 4,300
Share-based compensation expense	1,300
Future expense for performance stock option units	$ 900