Organization and Significant Accounting Policies (Schedule of Accounts Receivable Allowance For Doubtful Accounts) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2010
Allowance for Doubtful Accounts Receivable [Roll Forward]
Accounts receivable allowance for doubtful accounts, Balance at Beginning of Year	$ 496		$ 154		$ 1,338
Adjustments to Costs and Expenses	(2)	[1]	362	[1]	13	[1]
Deductions	14	[2]	(20)	[2]	(1,197)	[2]
Accounts receivable allowance for doubtful accounts, Balance at End of Year	$ 508		$ 496		$ 154

[1] Includes increases/(decreases) charged or credited to costs and expenses.

[2] Uncollectible accounts written off, net of recoveries.