Inventories Net (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Inventory Disclosure
Finished products	$ 366,558	$ 355,881	$ 356,849
Products in process and raw materials	19,924	16,442	18,918
Supplies and expendable parts	61,441	56,805	56,420
Inventories, Gross	447,923	429,128	432,187
Less allowances	(97,485)	(96,817)	(97,095)
Total	$ 350,438	$ 332,311	$ 335,092

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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Amount before valuation and LIFO reserves of other supplies used within the manufacturing or production process expected to be consumed within one year or operating cycle, if longer.

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