Interest Rate Swaps (Fair Values And Locations Of Derivative Instruments Recorded On The Balance Sheet) (Details) (Interest Rate Swap [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Sep. 30, 2011
Summary of Derivative Instruments by Risk Exposure [Line Items]
Total derivative contracts, net	$ 1,843	$ 1,619
Accrued Liabilities [Member]
Summary of Derivative Instruments by Risk Exposure [Line Items]
Total derivative contracts, net	1,247	988
Other Long-Term Liabilities [Member]
Summary of Derivative Instruments by Risk Exposure [Line Items]
Total derivative contracts, net	$ 596	$ 631