CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 10,016	$ 9,801	$ 18,048	$ 18,307
Foreign currency translation adjustment, net of deferred taxes	(445)	(1,079)	535	(929)
Comprehensive income	$ 9,571	$ 8,722	$ 18,583	$ 17,378