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Business Segments (Schedule Of Revenue From External Customers, By Geographical Areas) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |
Total revenues | $ 674,772 | $ 717,194 | $ 562,397
Europe (including former Soviet Union) |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |
Total revenues | 753 | 24,857 | 7,107
Far East |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |
Total revenues | 36,965 | 14,865 | 17,172
Middle East and Africa |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |
Total revenues | 86,470 | 79,781 | 46,304
North, Central and South America (excluding U.S.) |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |
Total revenues | 145,470 | 184,935 | 112,949
United States |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |
Total revenues | $ 405,114 | $ 412,756 | $ 378,865

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- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + References Reference 1: 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) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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