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Property, Plant and Equipment (Tables) | 6 Months Ended
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Jun. 30, 2017
Property, Plant and Equipment [Abstract] |
Summary of Property, Plant and Equipment | The following is a summary of property, plant and equipment at June 30, 2017 and December 31, 2016 (in thousands):
| Estimated Useful Lives in Years |  | June 30, 2017 |  | December 31, 2016
Land | — |  | $ | 15,948 |  |  | $ | 15,730 |
Land improvements | 8-15 |  | 9,256 |  |  | 9,379 |
Buildings and improvements | 39 |  | 129,967 |  |  | 73,211 |
Rental machinery and equipment | 7 |  | 933,489 |  |  | 933,667 |
Machinery and equipment - other | 7 |  | 58,559 |  |  | 60,182 |
Furniture, fixtures and computers | 5 |  | 20,767 |  |  | 19,073 |
Automobiles and other vehicles | 5 |  | 32,650 |  |  | 36,796 |
Aircraft | 7 |  | — |  |  | 16,267 |
Leasehold improvements | 7-15, or lease term if shorter |  | 10,261 |  |  | 8,027 |
Construction in progress - machinery and equipment and buildings | — |  | 70,050 |  |  | 120,937 |
|  |  | 1,280,947 |  |  | 1,293,269 |
Less: Accumulated depreciation |  |  | (755,108 | ) |  | (726,245 | )
Total property, plant and equipment, net |  |  | $ | 525,839 |  |  | $ | 567,024 |

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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 + Details
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