UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
NET EARNINGS	$ 11,952	$ 8,591	$ 21,429	$ 16,441
OTHER COMPREHENSIVE INCOME, NET OF TAX:
Foreign currency translation adjustments	(160)	57	(44)	(37)
Other comprehensive income (loss)	(160)	57	(44)	(37)
TOTAL COMPREHENSIVE INCOME	$ 11,792	$ 8,648	$ 21,385	$ 16,404