Quarterly Financial Information, Unaudited (Notes)

12 Months Ended

Feb. 28, 2013

Quarterly Financial Information Disclosure [Abstract]

Quarterly financial information, Unaudited

Quarterly financial information, Unaudited (in thousands, except per share amounts)

	Quarter ended
	May 31, 2012		August 31, 2012		November 30, 2012		February 28, 2013
Net sales	$	127,143	$	153,385	$	149,675	$	140,391
Gross profit	37,866		43,312		45,003		37,992
Net income	15,986		15,873		15,364		13,233
Basic earnings per common share	0.63		0.63		0.61		0.52
Diluted earnings per common share	0.63		0.62		0.60		0.52

	Quarter ended
	May 31, 2011		August 31, 2011		November 30, 2011		February 29, 2012
Net sales	$	114,333	$	114,661	$	116,493	$	123,625
Gross profit	31,069		30,380		30,807		32,331
Net income	9,465		9,606		10,021		11,644
Basic earnings per common share	0.38		0.38		0.40		0.47
Diluted earnings per common share	0.38		0.38		0.40		0.46