Description of Business and Summary of Significant Accounting Policies Product Warranty Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
Standard Product Warranty Accrual	$ 7,458	$ 9,720	$ 10,012	$ 12,478
Product Warranty Accrual	5,761	8,807
Inventory Valuation Reserves	1,697	913
Product Warranty Accrual, Additions from Business Acquisition	0	100	0
Standard Product Warranty Accrual, Warranties Issued	6,192	8,028	7,948
Product Warranty Accrual, Payments	(8,454)	(8,420)	(10,414)
Product Warranty Expense	$ 6,192	$ 8,028	$ 7,948