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ASSET RETIREMENT OBLIGATIONS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at October 1	$ 28,711	$ 27,983
Accretion	2,012	1,892
Additions	925	533
Retirements	(1,153)	(1,697)
Balance at period end	30,495	28,711
Future Accretion [Abstract]
2015	2,075
2016	2,139
2017	2,194
2018	2,248
2019	2,303
Total	$ 10,959

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Future Accretion associated with an asset retirement obligation

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Future Accretion, Year Five

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Future Accretion, Year Four

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Future Accretion, Year One

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Future Accretion, Year Three

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Future Accretion, Year Two

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The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 50

-Paragraph 1

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-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849



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-Publisher FASB

-Name Accounting Standards Codification

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Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.

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-Topic 410

-SubTopic 20

-Section 45

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Amount of asset retirement obligations incurred during the period.

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Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.

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