Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Schedule of Inventory [Line Items]
Raw materials	$ 176,091	$ 191,590	$ 172,186
Work-in-process	120,758	116,790	122,771
Finished goods	527,103	327,810	502,579
Other	13,365	13,781	13,887
Inventory, Gross, Total	837,317	649,971	811,423
Adjustment to value inventory at cost on the LIFO method	(95,937)	(95,823)	(68,949)
Inventories	$ 741,380	$ 554,148	$ 742,474