Inventories (Components Of Inventories) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Mar. 31, 2011	Mar. 31, 2012 Restated [Member]	Mar. 31, 2011 Restated [Member]
Raw materials and supplies	$ 22,237		$ 22,926
In-process inventories	2,655		8,046
Finished goods and goods for resale	92,798		89,813
Total	$ 117,690	$ 146,966	$ 120,785	$ 146,966