Accounts Receivable (Schedule of Components of Accounts Receivable) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Receivables [Abstract]
Accounts receivable	$ 33,989	$ 39,827
Accounts receivable – unbilled	3,562	5,362
Accounts receivable, gross	37,551	45,189
Allowance for doubtful accounts	(98)	(3,363)
Accounts receivable, net	$ 37,453	$ 41,826