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Inventories - Summary of Components of Inventories for Company's Manufacturing and Retail Operations (Detail) - USD ($)
$ in Thousands
Jun. 30, 2018
Mar. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 47,746 $ 37,852
Work in process 13,600 10,004
Finished goods and other 52,759 50,166
Total inventories $ 114,105 $ 98,022