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Inventories (Components of Inventories) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Mar. 31, 2017
Inventory Disclosure [Abstract]    
Packaging and raw materials $ 12,887 $ 9,984
Work in process 366 369
Finished goods 105,454 105,256
Inventories 118,707 115,609
Inventory valuation reserves related to obsolete and slow-moving inventory $ 4,900 $ 6,600