Schedule II-Valuation And Qualifying Accounts (Schedule) (Details) (Allowance for Doubtful Accounts [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2010
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	$ 1,307		$ 2,374		$ 3,680
Valuation Allowances and Reserves, Charged to Other Accounts	4,658	[1]	3,329	[1]	3,608	[1]
Valuation Allowances and Reserves, Deductions	(4,458)	[2]	(4,396)	[2]	(4,914)	[2]
Valuation Allowances and Reserves, Balance	$ 1,507		$ 1,307		$ 2,374

[1] Amounts charged against revenues for estimated sales returns.

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