SHARE-BASED COMPENSATION, Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Compensation Expense [Abstract]
Total share-based compensation expense	$ 7,169	$ 7,954	$ 7,243
Recognized tax benefit	2,200	2,200	2,000
401 (k) Profit Sharing Plan [Abstract]
Contribution to profit sharing plan	3,000	$ 2,800	$ 2,400
Restricted Stock [Member]
Compensation Expense [Abstract]
Unrecognized compensation expense	$ 8,200
Unrecognized compensation expense, period for recognition	27 months