UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
NET EARNINGS	$ 20,098	$ 18,003	$ 36,286	$ 33,276
OTHER COMPREHENSIVE INCOME, NET OF TAX:
Foreign currency translation adjustments	(350)	(143)	(613)	(800)
Other comprehensive income (loss)	(350)	(143)	(613)	(800)
TOTAL COMPREHENSIVE INCOME	$ 19,748	$ 17,860	$ 35,673	$ 32,476