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Inventories (Components of Inventories) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Mar. 31, 2016
Inventory Disclosure [Abstract]    
Packaging and raw materials $ 7,944 $ 7,563
Finished goods 92,982 83,700
Inventories 100,926 91,263
Inventory valuation reserves related to obsolete and slow-moving inventory $ 4,100 $ 4,800