Other Intangibles, Net (Schedule of Finite-Lived Intangible Assets by Major Class) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Gross Carrying Value	$ 491,609	$ 404,061
Accumulated Amortization	(205,834)	(168,498)
Net Carrying Amount	285,775	235,563
Amortization expense	36,979	32,809	34,993
Process Technology [Member]
Gross Carrying Value	100,176	94,882
Accumulated Amortization	(37,828)	(30,328)
Net Carrying Amount	62,348	64,554
Customer Relationships [Member]
Gross Carrying Value	321,233	246,991
Accumulated Amortization	(106,999)	(85,920)
Net Carrying Amount	214,234	161,071
Intellectual Property [Member]
Gross Carrying Value	20,218	20,001
Accumulated Amortization	(14,722)	(13,229)
Net Carrying Amount	5,496	6,772
Other Intangibles [Member]
Gross Carrying Value	49,982	42,187
Accumulated Amortization	(46,285)	(39,021)
Net Carrying Amount	3,697	3,166
Aerospace [Member]
Gross Carrying Value	403,294	316,586
Accumulated Amortization	(147,989)	(117,637)
Net Carrying Amount	255,305	198,949
Aerospace [Member] | Process Technology [Member]
Gross Carrying Value	76,718	71,716
Accumulated Amortization	(26,129)	(20,622)
Net Carrying Amount	50,589	51,094
Aerospace [Member] | Customer Relationships [Member]
Gross Carrying Value	279,225	205,221
Accumulated Amortization	(77,288)	(59,297)
Net Carrying Amount	201,937	145,924
Aerospace [Member] | Intellectual Property [Member]
Gross Carrying Value	0	0
Accumulated Amortization	0	0
Net Carrying Amount	0	0
Aerospace [Member] | Other Intangibles [Member]
Gross Carrying Value	47,351	39,649
Accumulated Amortization	(44,572)	(37,718)
Net Carrying Amount	2,779	1,931
Energy [Member]
Gross Carrying Value	88,315	87,475
Accumulated Amortization	(57,845)	(50,861)
Net Carrying Amount	30,470	36,614
Energy [Member] | Process Technology [Member]
Gross Carrying Value	23,458	23,166
Accumulated Amortization	(11,699)	(9,706)
Net Carrying Amount	11,759	13,460
Energy [Member] | Customer Relationships [Member]
Gross Carrying Value	42,008	41,770
Accumulated Amortization	(29,711)	(26,623)
Net Carrying Amount	12,297	15,147
Energy [Member] | Intellectual Property [Member]
Gross Carrying Value	20,218	20,001
Accumulated Amortization	(14,722)	(13,229)
Net Carrying Amount	5,496	6,772
Energy [Member] | Other Intangibles [Member]
Gross Carrying Value	2,631	2,538
Accumulated Amortization	(1,713)	(1,303)
Net Carrying Amount	$ 918	$ 1,235