CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2013	Nov. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 9,349	$ 6,170	$ 27,656	$ 17,641
Foreign currency translation adjustment, net of deferred taxes	244	384	(685)	(466)
Comprehensive income	$ 9,593	$ 6,554	$ 26,971	$ 17,175