Fair Value (Tables)

3 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

Estimated Fair Value Of Financial Instruments

The following table sets forth the estimated fair value of certain financial instruments at December 31, 2012 and September 30, 2012, which are measured and recorded at fair value on a recurring basis:

		December 31, 2012
		Fair Value Measurements
		Carrying Amount		Level 1		Level 2		Level 3		Estimated Fair  Value
Type of Contract	Balance Sheet Classification
Short term interest rate swaps	Accrued liabilities	$	1,751	$	—	$	1,751	$	—	$	1,751
Long term interest rate swaps	Other long-term liabilities	1,002		—		1,002		—		1,002
Total derivative contracts, net		$	2,753	$	—	$	2,753	$	—	$	2,753
		September 30, 2012
		Fair Value Measurements
		Carrying Amount		Level 1		Level 2		Level 3		Estimated Fair  Value
Type of Contract	Balance Sheet Classification
Short term interest rate swaps	Accrued liabilities	$	1,705	$	—	$	1,705	$	—	$	1,705
Long term interest rate swaps	Other long-term liabilities	1,414		—		1,414		—		1,414
Total derivative contracts, net		$	3,119	$	—	$	3,119	$	—	$	3,119