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Property, Plant and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2018
Property, Plant and Equipment [Abstract] |
Schedule of Components of Property, Plant and Equipment | The components of property, plant and equipment are as follows:
| December 31,
(in thousands) | 2018 |  | 2017
Land | $ | 29,739 |  |  | $ | 22,388 |
Land improvements and leasehold improvements | 68,826 |  |  | 69,127 |
Buildings and storage facilities | 284,998 |  |  | 284,820 |
Machinery and equipment | 393,640 |  |  | 373,127 |
Construction in progress | 102,394 |  |  | 7,502 |
| 879,597 |  |  | 756,964 |
Less: accumulated depreciation | 402,886 |  |  | 372,287 |
| $ | 476,711 |  |  | $ | 384,677 |
Components of Railcar Assets Leased to Others | The components of the Rail Group assets leased to others are as follows:
| December 31,
(in thousands) | 2018 |  | 2017
Rail Group assets leased to others | $ | 640,349 |  |  | $ | 531,391 |
Less: accumulated depreciation | 118,564 |  |  | 107,948 |
| $ | 521,785 |  |  | $ | 423,443 |

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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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- Definition Tabular disclosure of lessor's property under leasing agreements and property available for lease (not currently under lease) by property class, the gross amount, accumulated depreciation and net amount of as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718 + Details
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