Schedule II-Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Valuation allowance for doubtful accounts [Member]
Valuation allowance for Doubtful Accounts
Balance at beginning of period	$ 59		$ 24		$ 0
Addition / Charges	89		59		24
Deduction	0	[1]	(24)	[1]	0	[1]
Balance at end of period	148		59		24
Income tax valuation allowance [Member]
Valuation allowance for Doubtful Accounts
Balance at beginning of period	35,170		29,457		22,724
Addition / Charges	13,979		5,717		6,752
Deduction	72	[1]	(4)	[1]	(19)	[1]
Balance at end of period	$ 49,221		$ 35,170		$ 29,457

[1] write-offs net of recoveries