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Other Assets - Schedule of Other Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Other Assets [Line Items]
Overfunded pension plans	$ 33,345	$ 67,518
Cash surrender value of life insurance contracts	51,391	56,177
Other	74,784	56,138
Total	$ 159,520	$ 179,833

- Definition

Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

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- Definition

The amount for overfunded plans recognized in the balance sheet as a noncurrent asset associated with a defined benefit pension plan or other postretirement defined benefit plan.

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