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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2018
Property Plant And Equipment [Abstract] |
Property, Plant and Equipment | 4. Property, Plant and Equipment
|  | Useful lives in |  | December 31, |
|  | years |  | 2018 |  |  | 2017 |
|  |  |  | (In Thousands) |
Machinery, equipment and automotive |  | 3 - 30 |  | $ | 1,189,438 |  |  | $ | 1,163,532 |
Buildings and improvements |  | 10 - 30 |  |  | 39,032 |  |  |  | 42,886 |
Land improvements |  | 10 - 40 |  |  | 8,076 |  |  |  | 8,111 |
Furniture, fixtures and store equipment |  | 3 |  |  | 1,122 |  |  |  | 1,466 |
Construction in progress |  | N/A |  |  | 28,753 |  |  |  | 27,973 |
Capital spare parts |  | N/A |  |  | 28,945 |  |  |  | 29,835 |
Land |  | N/A |  |  | 4,583 |  |  |  | 7,764 |
|  |  |  |  | 1,299,949 |  |  |  | 1,281,567 |
Less accumulated depreciation and amortization |  |  |  |  | 325,701 |  |  |  | 267,529 |
|  |  |  | $ | 974,248 |  |  | $ | 1,014,038 |
Machinery, equipment and automotive primarily includes the categories of property and equipment and estimated useful lives as follows: processing plants and plant infrastructure (15-30 years); certain processing plant components (3-10 years); and trucks, automobiles, trailers, and other rolling stock (2-7 years).

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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