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Acquisitions and Divestitures (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Held for Sale
Current assets			$ 2,644
Property, plant & equipment, net			20,934
Other assets			3,305
Total assets held for sale	0	0	26,883
Other liabilities			1,474
Total liabilities of assets held for sale	$ 0	$ 0	$ 1,474

Liability (such as a mortgage) related to a disposal group that is held for sale and anticipated to be sold in less than one year. The liability is expected to be discharged as part of the plan of sale for the asset.

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- Definition

The lower of the carrying value or fair value less cost to sell of current assets held for sale that are not elsewhere specified in the taxonomy. The carrying value of major classes of assets and liabilities of the disposal group are separately disclosed in the balance sheet in the specific concepts provided.

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