Financial and Product Information About Foreign and Domestic Operations Geographical Data (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Feb. 28, 2014	Nov. 30, 2013	Aug. 31, 2013	May 31, 2013	Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2012	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net	$ 187,105	$ 245,814	$ 183,818	$ 192,972	$ 206,790	$ 243,036	$ 191,715	$ 194,036	$ 809,709	$ 835,577	$ 707,062
Long-Lived Assets	375,472				428,286				375,472	428,286	293,197
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									542,697	575,481	585,293
Long-Lived Assets	216,645				274,527				216,645	274,527	265,870
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									3,118	3,973	4,999
Long-Lived Assets	95				113				95	113	174
Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									14,140	27,090	26,728
Long-Lived Assets	13,861				11,983				13,861	11,983	7,405
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									249,754	229,033	90,042
Long-Lived Assets	$ 144,871				$ 141,663				$ 144,871	$ 141,663	$ 19,748