Financial and Product Information About Foreign and Domestic Operations Geographical Data (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 29, 2016	Nov. 30, 2015	Aug. 31, 2015	May. 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2014	May. 31, 2014	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net	$ 169,683	$ 192,506	$ 154,174	$ 164,383	$ 169,900	$ 223,356	$ 177,343	$ 186,899	$ 680,746	$ 757,498	$ 809,709
Long-Lived Assets	79,422				69,783				79,422	69,783	83,222
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									461,606	500,847	542,697
Long-Lived Assets	47,092				35,835				47,092	35,835	35,440
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									7,439	10,478	17,258
Long-Lived Assets	3,989				3,996				3,989	3,996	13,903
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									211,701	246,173	249,754
Long-Lived Assets	$ 28,341				$ 29,952				$ 28,341	$ 29,952	$ 33,879