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Inventory (table)
12 Months Ended
Mar. 31, 2016
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
201620152014
(In thousands)
Finished products$467,337$414,154$418,368
In process25,85522,65116,056
Raw materials and supplies213,790199,674170,210
706,982636,479604,634
Less excess of FIFO cost over LIFO cost139,275164,067153,384
Total inventories$567,707$472,412$451,250