Inventories - Components Of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Inventory [Line Items]
Raw materials and supplies	$ 34,510	$ 22,237
In-process inventories	4,714	2,655
Finished goods and goods for resale	120,837	92,798
Total	$ 160,061	$ 117,690	$ 121,400