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Property, Plant and Equipment (Tables) | 3 Months Ended
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Aug. 31, 2013
Property, Plant and Equipment | Depreciation and amortization of assets are computed by the straight-line method over the following estimated useful lives of the assets:
Classification |  | Useful Life |
Buildings |  |  | 20-40 years |
Leasehold improvements |  |  | 2-15 years |
Machinery and equipment |  |  | 2-12 years |
Furniture and fixtures |  |  | 2-10 years |
Computers and computer software |  |  | 2-5 years |
Automobiles |  |  | 2-5 years |
Property, Plant and Equipment |
Property, Plant and Equipment | A summary of property, plant and equipment as of August 31, 2013 and May 31, 2013 is as follows (in thousands):
|  | August 31, 2013 |  |  | May 31, 2013 |
|  | (unaudited) |  |  |  |
Land |  | $ | 3,092 |  |  | $ | 3,108 |
Buildings and leasehold improvements |  |  | 20,603 |  |  |  | 18,445 |
Machinery and equipment |  |  | 141,102 |  |  |  | 137,439 |
Furniture and fixtures |  |  | 4,668 |  |  |  | 4,469 |
Computers and computer software |  |  | 9,146 |  |  |  | 8,871 |
Automobiles |  |  | 3,572 |  |  |  | 3,842 |
Construction in progress |  |  | 3,499 |  |  |  | 3,816 |
Total |  |  | 185,682 |  |  |  | 179,990 |
Accumulated depreciation and amortization |  |  | (108,958 | ) |  |  | (105,051 | )
Property, plant, and equipment, net |  | $ | 76,724 |  |  | $ | 74,939 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -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 210.5-02.13) -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 13 -Subparagraph b -Article 5 + Details
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