Financial and Product Information About Foreign and Domestic Operations Geographical Data (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 28, 2017	Nov. 30, 2016	Aug. 31, 2016	May 31, 2016	Feb. 29, 2016	Nov. 30, 2015	Aug. 31, 2015	May 31, 2015	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net	$ 167,387	$ 198,937	$ 159,262	$ 155,456	$ 169,683	$ 192,506	$ 154,174	$ 164,383	$ 681,042	$ 680,746	$ 757,498
Long-Lived Assets	81,601				79,422				81,601	79,422	69,783
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									449,865	461,606	500,847
Long-Lived Assets	49,937				47,092				49,937	47,092	35,835
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									4,809	7,439	10,478
Long-Lived Assets	3,964				3,989				3,964	3,989	3,996
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									226,368	211,701	246,173
Long-Lived Assets	$ 27,700				$ 28,341				$ 27,700	$ 28,341	$ 29,952