Derivative Instruments and Hedging Activities (Details) (Interest Rate Swap Agreement [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Aug. 31, 2011	Aug. 31, 2012	Aug. 31, 2011	Feb. 28, 2011
Interest Rate Swap Agreement [Member]
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Interest Rate Swap Agreement, inception date		Jul. 07, 2008
Interest Rate Swap Agreement, term		3 years
Interest Rate Swap Agreement, notional amount		$ 40.0
Interest Rate Swap Agreement, expiration date		Jul. 22, 2011
LIBOR rate for the Company's Floating rate debt		3.79%
Interest expense related to Swap	0.2		0.6
Cash flow hedge related to swap, fair value				(0.6)
Cash flow hedges related to swap, net of deferred taxes				$ (0.4)