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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Sep. 30, 2012
Gross Carrying Value	$ 483,186		$ 483,186		$ 404,061
Accumulated Amortization	(195,673)		(195,673)		(168,498)
Net Carrying Amount	287,513		287,513		235,563
Amortization expense	9,769	8,139	27,249	24,691
Process Technology [Member]
Gross Carrying Value	99,399		99,399		94,882
Accumulated Amortization	(35,935)		(35,935)		(30,328)
Net Carrying Amount	63,464		63,464		64,554
Customer Relationships and Contracts [Member]
Gross Carrying Value	313,909		313,909		246,991
Accumulated Amortization	(101,557)		(101,557)		(85,920)
Net Carrying Amount	212,352		212,352		161,071
Intellectual Property [Member]
Gross Carrying Value	20,001		20,001		20,001
Accumulated Amortization	(14,245)		(14,245)		(13,229)
Net Carrying Amount	5,756		5,756		6,772
Other Intangibles [Member]
Gross Carrying Value	49,877		49,877		42,187
Accumulated Amortization	(43,936)		(43,936)		(39,021)
Net Carrying Amount	5,941		5,941		3,166
Aerospace [Member]
Gross Carrying Value	395,726		395,726		316,586
Accumulated Amortization	(139,763)		(139,763)		(117,637)
Net Carrying Amount	255,963		255,963		198,949
Aerospace [Member] | Process Technology [Member]
Gross Carrying Value	76,271		76,271		71,716
Accumulated Amortization	(24,719)		(24,719)		(20,622)
Net Carrying Amount	51,552		51,552		51,094
Aerospace [Member] | Customer Relationships and Contracts [Member]
Gross Carrying Value	272,131		272,131		205,221
Accumulated Amortization	(72,689)		(72,689)		(59,297)
Net Carrying Amount	199,442		199,442		145,924
Aerospace [Member] | Intellectual Property [Member]
Gross Carrying Value	0		0		0
Accumulated Amortization	0		0		0
Net Carrying Amount	0		0		0
Aerospace [Member] | Other Intangibles [Member]
Gross Carrying Value	47,324		47,324		39,649
Accumulated Amortization	(42,355)		(42,355)		(37,718)
Net Carrying Amount	4,969		4,969		1,931
Energy [Member]
Gross Carrying Value	87,460		87,460		87,475
Accumulated Amortization	(55,910)		(55,910)		(50,861)
Net Carrying Amount	31,550		31,550		36,614
Energy [Member] | Process Technology [Member]
Gross Carrying Value	23,128		23,128		23,166
Accumulated Amortization	(11,216)		(11,216)		(9,706)
Net Carrying Amount	11,912		11,912		13,460
Energy [Member] | Customer Relationships and Contracts [Member]
Gross Carrying Value	41,778		41,778		41,770
Accumulated Amortization	(28,868)		(28,868)		(26,623)
Net Carrying Amount	12,910		12,910		15,147
Energy [Member] | Intellectual Property [Member]
Gross Carrying Value	20,001		20,001		20,001
Accumulated Amortization	(14,245)		(14,245)		(13,229)
Net Carrying Amount	5,756		5,756		6,772
Energy [Member] | Other Intangibles [Member]
Gross Carrying Value	2,553		2,553		2,538
Accumulated Amortization	(1,581)		(1,581)		(1,303)
Net Carrying Amount	$ 972		$ 972		$ 1,235