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Segment Information (Consolidated Net Sales and Earnings by Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Net sales	$ 468,793	$ 418,866	$ 876,689	$ 783,941
Interest expense, net	(6,468)	(6,214)	(12,650)	(12,592)
Consolidated earnings before income taxes	54,038	46,487	94,214	77,962
Total of Reporting Segments [Member]
Segment earnings (loss)	68,015	60,182	121,800	104,599
Aerospace [Member]
Net sales	224,337	204,945	417,563	386,089
Segment earnings (loss)	33,681	33,241	60,741	53,155
Energy [Member]
Net sales	244,456	213,921	459,126	397,852
Segment earnings (loss)	34,334	26,941	61,059	51,444
Unallocated Corporate [Member]
Segment earnings (loss)	$ (7,509)	$ (7,481)	$ (14,936)	$ (14,045)

X

- Definition

Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 4

-Section 08

-Paragraph h

-Subparagraph 1(i)



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h)(1)(i))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

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X

- Definition

Amount of interest revenue (income derived from investments in debt securities and on cash and cash equivalents) net of interest expense (cost of borrowed funds accounted for as interest).

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 1



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

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+ References

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