STOCK-BASED COMPENSATION: Qualified Employee Stock Purchase Plan (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
Sep. 30, 2022	Sep. 30, 2021
Share-based compensation
Future expense for performance stock option units	$ 218,282
Employee stock purchase plan
Share-based compensation
Stock issued during period, ESPP (in shares)	109,396
Shares issued, price per share (in dollars per share)	$ 21.76
Stock issued during period, ESPP, value	$ 2,400
Share-based compensation expense	1,015	$ 871
Future expense for performance stock option units	$ 400

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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