SHARE-BASED COMPENSATION, Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Compensation Expense [Abstract]
Total share-based compensation expense	$ 7,243	$ 6,464	$ 6,025
Recognized tax benefit	2,000	1,900	2,500
401 (k) Profit Sharing Plan [Abstract]
Contribution to profit sharing plan	2,400	$ 2,100	$ 1,900
Restricted Stock [Member]
Compensation Expense [Abstract]
Unrecognized compensation expense	$ 9,300
Unrecognized compensation expense, period for recognition	27 months