v2.4.0.8

Fair Value Measurement (Details 2) (Contingent consideration, USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Changes in liabilities measured at fair value for which the Company has used Level 3 inputs to determine fair value
Balance at the beginning of the period	$ 14,511,000	$ 10,151,000
Acquisition contingent consideration	18,050,000	8,185,000
Settlements	(19,608,000)	(3,162,000)
Increase (decrease) of contingent consideration	5,437,000	(663,000)
Balance at the end of the period	18,390,000	14,511,000
Jacobs Trading, LLC
Changes in liabilities measured at fair value for which the Company has used Level 3 inputs to determine fair value
Increase (decrease) of contingent consideration	5,097,000
NESA
Changes in liabilities measured at fair value for which the Company has used Level 3 inputs to determine fair value
Increase (decrease) of contingent consideration	$ 340,000
Level 3 | Income approach | Minimum
Changes in liabilities measured at fair value for which the Company has used Level 3 inputs to determine fair value
Discount rate (as a percent)	2.00%
Level 3 | Income approach | Maximum
Changes in liabilities measured at fair value for which the Company has used Level 3 inputs to determine fair value
Discount rate (as a percent)	9.70%

X

- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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X

- Definition

Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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X

- Definition

Amount of purchases of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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- Definition

Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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X

- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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