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Industry Segment Information (Schedule Of Segment Reporting Information, By Segment) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
May 31, 2014 | May 31, 2013 | May 31, 2014 | May 31, 2013
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenues | $ 169,936 | $ 219,542 | $ 470,411 | $ 542,451
Segment operating income | 28,935 | 44,249 | 74,308 | 103,600
Unallocated general and administrative expenses | (3,713) | (4,699) | (12,181) | (12,340)
Interest and other income (expense), net | 278 | 200 | (21) | 361
Earnings before income taxes | 25,500 | 39,750 | 62,106 | 91,621
Capital Expenditures | 2,483 | 2,807 | 7,836 | 8,149
Depreciation and Amortization | 3,747 | 3,140 | 11,131 | 9,380
Irrigation [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Number of operating segments |  |  | 13 |
Total operating revenues | 149,010 | 200,950 | 414,077 | 497,844
Segment operating income | 28,040 | 44,052 | 72,899 | 106,787
Capital Expenditures | 2,390 | 2,733 | 7,327 | 7,784
Depreciation and Amortization | 2,424 | 1,725 | 7,123 | 5,121
Infrastructure [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Number of operating segments |  |  | 2 |
Total operating revenues | 20,926 | 18,592 | 56,334 | 44,607
Segment operating income | 895 | 197 | 1,409 | (3,187)
Capital Expenditures | 93 | 74 | 509 | 365
Depreciation and Amortization | $ 1,323 | $ 1,415 | $ 4,008 | $ 4,259

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- Definition Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business). + References No definition available. + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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