Goodwill (Goodwill) (Details) (USD $) In Thousands	12 Months Ended
Sep. 30, 2011	Sep. 30, 2010
Goodwill, Beginning Balance	$ 438,594	$ 442,802
Additions	24,188	0
Adjustments	(103)	(2,722)
Effects of Currency Translation	(397)	(1,486)
Goodwill, Ending Balance	462,282	438,594
Energy [Member]
Goodwill, Beginning Balance	81,914	83,268
Additions	24,188	0
Adjustments	0	0
Effects of Currency Translation	(345)	(1,354)
Goodwill, Ending Balance	105,757	81,914
Aerospace [Member]
Goodwill, Beginning Balance	356,680	359,534
Additions	0	0
Adjustments	(103)	(2,722)
Effects of Currency Translation	(52)	(132)
Goodwill, Ending Balance	$ 356,525	$ 356,680

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 4: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-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 6: http://www.xbrl.org/2003/role/presentationRef

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-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.

+ Details