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Accrued Expenses (Components Of Accrued Expenses) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accrued Liabilities Current [Line Items]
Clinical and preclinical trials	$ 25,150	$ 21,453
Payroll and payroll-related	13,439	1,112
Interest payable	1,698
Accrued professional services and other liabilities	8,664	1,719
Total	$ 48,951	$ 24,284

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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