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Other Financial Statement Information (Tables) | 9 Months Ended
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Sep. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Inventories - Net | Inventories – net
|  | September 30, 2019 |  |  | December 31, 2018 |
Raw materials |  | $ | 48,948 |  |  | $ | 43,041 |
Work-in-process |  |  | 10,926 |  |  |  | 8,818 |
Finished Goods |  |  | 40,945 |  |  |  | 42,163 |
|  |  | 100,819 |  |  |  | 94,022 |
Excess of current cost over LIFO cost |  |  | (4,978 | ) |  |  | (4,474 | )
Noncurrent portion of inventory |  |  | (3,614 | ) |  |  | (4,289 | )
|  | $ | 92,227 |  |  | $ | 85,259 |
Property, Plant and Equipment - Net | Major classes of Property, plant and equipment are stated at cost and were as follows:
|  | September 30, 2019 |  |  | December 31, 2018 |
Land and improvements |  | $ | 18,380 |  |  | $ | 12,552 |
Buildings and improvements |  |  | 81,896 |  |  |  | 74,743 |
Machinery, equipment and aircraft |  |  | 179,503 |  |  |  | 171,015 |
Construction in progress |  |  | 6,356 |  |  |  | 3,392 |
|  |  | 286,135 |  |  |  | 261,702 |
Less accumulated depreciation |  |  | (168,438 | ) |  |  | (158,747 | )
|  | $ | 117,697 |  |  | $ | 102,955 |

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