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Accrued Liabilities (Major Components Of Accrued Liabilities) (Detail) (Restated [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Restated [Member]
Accounts Payable And Accrued Liabilities Current And Noncurrent [Line Items]
Operating accruals	$ 38,497	$ 48,044
Accrued interest	9,711	9,857
Total	$ 48,208	$ 57,901

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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