Interest Rate Swaps (Tables)

6 Months Ended

Mar. 31, 2012

Interest Rate Swaps [Abstract]

Fair Value Of Cash Flow Hedge Derivative Contracts Included In The Consolidated Balance Sheets

		March 31		September 30
Type of Contract	Balance Sheet Classification	2012		2011
Short term interest rate swaps	Accrued liabilities	$	1,289	$	988
Long term interest rate swaps	Other long-term liabilities		824		631
Total derivative contracts, net		$	2,113	$	1,619