Schedule II Valuation And Qualifying Accounts (Details) (Allowance for Doubtful Accounts [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 1,088		$ 794		$ 852
Charged to costs and expenses	(173)		445		192
Charged to other accounts	20	[1]	81	[1]	53	[1]
Deductions	(335)	[2]	(232)	[2]	(303)	[2]
Balance at end of period	$ 600		$ 1,088		$ 794

[1] Collection of accounts previously written off

[2] Uncollectible accounts written off