Other Intangibles, Net (Schedule of Finite-Lived Intangible Assets by Major Class) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Sep. 30, 2011
Gross Carrying Value	$ 403,742		$ 403,742		$ 404,722
Accumulated Amortization	(160,249)		(160,249)		(135,825)
Net Carrying Amount	243,493		243,493		268,897
Amortization expense	8,139	8,935	24,691	26,020
Customer Relationships [Member]
Gross Carrying Value	246,888		246,888		247,162
Accumulated Amortization	(80,737)		(80,737)		(65,348)
Net Carrying Amount	166,151		166,151		181,814
Intellectual Property [Member]
Gross Carrying Value	19,919		19,919		20,162
Accumulated Amortization	(12,843)		(12,843)		(11,918)
Net Carrying Amount	7,076		7,076		8,244
Process Technology [Member]
Gross Carrying Value	94,794		94,794		95,142
Accumulated Amortization	(28,488)		(28,488)		(23,037)
Net Carrying Amount	66,306		66,306		72,105
Other Intangibles [Member]
Gross Carrying Value	42,141		42,141		42,256
Accumulated Amortization	(38,181)		(38,181)		(35,522)
Net Carrying Amount	3,960		3,960		6,734
Aerospace [Member]
Gross Carrying Value	316,508		316,508		316,497
Accumulated Amortization	(111,174)		(111,174)		(91,687)
Net Carrying Amount	205,334		205,334		224,810
Aerospace [Member] | Customer Relationships [Member]
Gross Carrying Value	205,177		205,177		205,171
Accumulated Amortization	(54,880)		(54,880)		(41,652)
Net Carrying Amount	150,297		150,297		163,519
Aerospace [Member] | Intellectual Property [Member]
Gross Carrying Value	0		0		0
Accumulated Amortization	0		0		0
Net Carrying Amount	0		0		0
Aerospace [Member] | Process Technology [Member]
Gross Carrying Value	71,694		71,694		71,691
Accumulated Amortization	(19,309)		(19,309)		(15,380)
Net Carrying Amount	52,385		52,385		56,311
Aerospace [Member] | Other Intangibles [Member]
Gross Carrying Value	39,637		39,637		39,635
Accumulated Amortization	(36,985)		(36,985)		(34,655)
Net Carrying Amount	2,652		2,652		4,980
Energy [Member]
Gross Carrying Value	87,234		87,234		88,225
Accumulated Amortization	(49,075)		(49,075)		(44,138)
Net Carrying Amount	38,159		38,159		44,087
Energy [Member] | Customer Relationships [Member]
Gross Carrying Value	41,711		41,711		41,991
Accumulated Amortization	(25,857)		(25,857)		(23,696)
Net Carrying Amount	15,854		15,854		18,295
Energy [Member] | Intellectual Property [Member]
Gross Carrying Value	19,919		19,919		20,162
Accumulated Amortization	(12,843)		(12,843)		(11,918)
Net Carrying Amount	7,076		7,076		8,244
Energy [Member] | Process Technology [Member]
Gross Carrying Value	23,100		23,100		23,451
Accumulated Amortization	(9,179)		(9,179)		(7,657)
Net Carrying Amount	13,921		13,921		15,794
Energy [Member] | Other Intangibles [Member]
Gross Carrying Value	2,504		2,504		2,621
Accumulated Amortization	(1,196)		(1,196)		(867)
Net Carrying Amount	$ 1,308		$ 1,308		$ 1,754