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Description Of Business And Significant Accounting Policies (Narrative) (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Aug. 31, 2014 segment | Aug. 31, 2013
Description Of Business And Significant Accounting Policies [Line Items] |  |
Accounts receivable, current | $ 94,135,000 | $ 120,291,000
Allowance for doubtful accounts | 4,800,000 | 2,900,000
Number of reportable segments | 2 |
Leased Barriers [Member] |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |
Useful life | 12 years |
Maximum [Member] | Leased Barrier Transfer Machines [Member] |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |
Useful life | 10 years |
Maximum [Member] | Building [Member] |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |
Useful life | 30 years |
Maximum [Member] | Equipment [Member] |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |
Useful life | 7 years |
Maximum [Member] | Other [Member] |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |
Useful life | 20 years |
Minimum [Member] | Leased Barrier Transfer Machines [Member] |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |
Useful life | 8 years |
Minimum [Member] | Building [Member] |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |
Useful life | 15 years |
Minimum [Member] | Equipment [Member] |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |
Useful life | 3 years |
Minimum [Member] | Other [Member] |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |
Useful life | 2 years |
Iraq Contract Performance Bonds [Member] |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |
Contractual Obligation | 1,900,000 |
Performance bond obligations | 1,900,000 |
Chinese Government Deliquent Accounts Receivable [Member] |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |
Accounts receivable, current and long-term | 8,000,000 |
Iraq Contract Accounts Receivable [Member] |  |
Description Of Business And Significant Accounting Policies [Line Items] |  |
Accounts receivable, current | $ 2,500,000 |

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- Definition For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.9) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.5) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 + Details
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