Supporting Financial Information - Accrued Payroll (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued payroll related to billed receivables	$ 2,259	$ 2,440
Accrued payroll related to unbilled accounts receivable	536	348
Total accrued payroll related to unbilled accounts receivable	536	9,025
Accrued payroll	2,795	11,465
Unfavorable Regulatory Action | Department of Labor
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued payroll related to retroactive payment claim	$ 0	$ 8,677