Accrued Expenses (Detail) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Schedule of Accrued Liabilities [Line Items]
Accrued interest	$ 4,414	$ 6,710
Accrued compensation and benefits	41,316	57,781
Other accrued expenses	47,861	35,121
Accrued expenses	$ 93,591	$ 99,612

Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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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