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Accounts Payable and Accrued Expenses (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Sep. 30, 2014
Payables and Accruals [Abstract]    
Accounts payable $ 10,148us-gaap_AccountsPayableCurrent $ 12,990us-gaap_AccountsPayableCurrent
Accrued compensation and benefits 19,073us-gaap_EmployeeRelatedLiabilitiesCurrent 17,963us-gaap_EmployeeRelatedLiabilitiesCurrent
Other accrued expenses 8,556us-gaap_AccruedLiabilitiesCurrent 7,874us-gaap_AccruedLiabilitiesCurrent
Accounts payable and accrued expenses, total $ 37,777us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent $ 38,827us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent