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Intangible Assets, Net (Schedule of Finite-Lived Intangible Assets by Major Class) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2015
Gross Carrying Value | $ 444,448 |  | $ 445,256
Accumulated Amortization | (226,378) |  | (220,118)
Net Carrying Amount | 218,070 |  | 225,138
Amortization expense | 6,946 | $ 7,575 |
Process Technology [Member] |  |  |
Gross Carrying Value | 99,425 |  | 99,529
Accumulated Amortization | (53,817) |  | (52,032)
Net Carrying Amount | 45,608 |  | 47,497
Customer Relationships [Member] |  |  |
Gross Carrying Value | 323,083 |  | 323,634
Accumulated Amortization | (153,345) |  | (149,123)
Net Carrying Amount | 169,738 |  | 174,511
Intellectual Property [Member] |  |  |
Gross Carrying Value | 19,327 |  | 19,445
Accumulated Amortization | (17,124) |  | (16,921)
Net Carrying Amount | 2,203 |  | 2,524
Other Intangibles [Member] |  |  |
Gross Carrying Value | 2,613 |  | 2,648
Accumulated Amortization | (2,092) |  | (2,042)
Net Carrying Amount | 521 |  | 606
Aerospace [Member] |  |  |
Gross Carrying Value | 360,230 |  | 360,230
Accumulated Amortization | (160,928) |  | (154,943)
Net Carrying Amount | 199,302 |  | 205,287
Aerospace [Member] | Process Technology [Member] |  |  |
Gross Carrying Value | 76,605 |  | 76,605
Accumulated Amortization | (38,866) |  | (37,411)
Net Carrying Amount | 37,739 |  | 39,194
Aerospace [Member] | Customer Relationships [Member] |  |  |
Gross Carrying Value | 282,225 |  | 282,225
Accumulated Amortization | (120,712) |  | (116,232)
Net Carrying Amount | 161,513 |  | 165,993
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 | 1,400 |  | 1,400
Accumulated Amortization | (1,350) |  | (1,300)
Net Carrying Amount | 50 |  | 100
Industrial [Member] |  |  |
Gross Carrying Value | 84,218 |  | 85,026
Accumulated Amortization | (65,450) |  | (65,175)
Net Carrying Amount | 18,768 |  | 19,851
Industrial [Member] | Process Technology [Member] |  |  |
Gross Carrying Value | 22,820 |  | 22,924
Accumulated Amortization | (14,951) |  | (14,621)
Net Carrying Amount | 7,869 |  | 8,303
Industrial [Member] | Customer Relationships [Member] |  |  |
Gross Carrying Value | 40,858 |  | 41,409
Accumulated Amortization | (32,633) |  | (32,891)
Net Carrying Amount | 8,225 |  | 8,518
Industrial [Member] | Intellectual Property [Member] |  |  |
Gross Carrying Value | 19,327 |  | 19,445
Accumulated Amortization | (17,124) |  | (16,921)
Net Carrying Amount | 2,203 |  | 2,524
Industrial [Member] | Other Intangibles [Member] |  |  |
Gross Carrying Value | 1,213 |  | 1,248
Accumulated Amortization | (742) |  | (742)
Net Carrying Amount | $ 471 |  | $ 506

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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