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Description of Business and Summary of Significant Accounting Policies Inventory (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Feb. 28, 2017
Feb. 28, 2019
Feb. 28, 2018
Inventory Disclosure [Abstract]      
Inventory, Raw Materials, Net of Reserves   $ 27,518 $ 28,071
Inventory, Work in Process, Net of Reserves   2,622 2,485
Inventory, Finished Goods, Net of Reserves   72,239 87,436
Inventory   102,379 117,992
Inventory Write-down $ 1,987 $ 4,580 $ 2,733