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Accounts Payable and Other Accrued Expenses - Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Payables and Accruals [Abstract]
Deferred consideration payable	$ 11,524	$ 2,920
Contingent consideration payable	10,813	11,901
Total other current liabilities	$ 22,337	$ 14,821

Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

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