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Property, Plant And Equipment (Details) - USD ($) $ in Thousands | Aug. 31, 2018 | Aug. 31, 2017
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Property, Plant and Equipment [Line Items] |  |
Total operating property, plant and equipment | $ 145,114 | $ 162,839
Accumulated depreciation | (98,191) | (99,912)
Total operating property, plant, and equipment, net | 46,923 | 62,927
Machines | 8,214 | 7,833
Barriers | 18,122 | 18,468
Total property held for lease | 26,336 | 26,301
Accumulated depreciation | (16,011) | (14,730)
Total property held for lease, net | 10,325 | 11,571
Property, plant, and equipment, net | 57,248 | 74,498
Land [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Total operating property, plant and equipment | 2,799 | 4,869
Building [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Total operating property, plant and equipment | 37,220 | 49,977
Machinery And Equipment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Total operating property, plant and equipment | 75,635 | 80,442
Furniture and Fixtures [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Total operating property, plant and equipment | 22,727 | 24,547
Construction in Progress [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Total operating property, plant and equipment | $ 6,733 | $ 3,004

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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 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 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets excluding assets held under lease agreements used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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