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Inventory (table) (detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Inventory Disclosure [Abstract]      
Finished products $ 418,368 $ 445,278 $ 406,164
In process 16,056 18,107 24,451
Raw material and supplies 170,210 149,359 139,045
Total 604,634 612,744 569,660
Inventory, LIFO Reserve 153,384 133,014 137,227
Total Inventories $ 451,250 $ 479,730 $ 432,433