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PREPAID WORKERS' COMPENSATION: (Details) (USD $) In Thousands, unless otherwise specified				9 Months Ended
	Jun. 30, 2012	Sep. 30, 2011	Jun. 30, 2012 Workers compensation program, Zurich	Jun. 30, 2012 Workers compensation program, Zurich Minimum	Jun. 30, 2012 Workers compensation program, Zurich Maximum	Jun. 30, 2012 Workers compensation program, other policy deposits
PREPAID WORKERS COMPENSATION
Prepaid asset	$ 517	$ 513	$ 300			$ 200
Period over which remaining prepaid asset will be received				12 months	36 months

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+ References

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Carrying amount as of the balance sheet date of expenditures made, not otherwise specified in the taxonomy, in advance of the timing of recognition of expenses which are expected to be charged against earnings within one year or the normal operating cycle, if longer.

+ References

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

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section A

-Paragraph 4

-Chapter 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 1

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6676-107765



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6787-107765

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