CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2013	Aug. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 9,801	$ 7,592	$ 18,307	$ 11,471
Foreign currency translation adjustment, net of deferred taxes	(1,079)	1,257	(929)	(850)
Comprehensive income	$ 8,722	$ 8,849	$ 17,378	$ 10,621