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Other Financial Statement Information (Tables) | 6 Months Ended
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Jun. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Inventories - Net | Inventories – net
|  | June 30, 2019 |  |  | December 31, 2018 |
Raw materials |  | $ | 48,324 |  |  | $ | 43,041 |
Work-in-process |  |  | 9,888 |  |  |  | 8,818 |
Finished Goods |  |  | 43,328 |  |  |  | 42,163 |
|  |  | 101,540 |  |  |  | 94,022 |
Excess of current cost over LIFO cost |  |  | (4,852 | ) |  |  | (4,474 | )
Noncurrent portion of inventory |  |  | (3,956 | ) |  |  | (4,289 | )
|  | $ | 92,732 |  |  | $ | 85,259 |
Property, Plant and Equipment - Net | Major classes of Property, plant and equipment are stated at cost and were as follows:
|  | June 30, 2019 |  |  | December 31, 2018 |
Land and improvements |  | $ | 16,821 |  |  | $ | 12,552 |
Buildings and improvements |  |  | 78,051 |  |  |  | 74,743 |
Machinery, equipment and aircraft |  |  | 179,200 |  |  |  | 171,015 |
Construction in progress |  |  | 5,874 |  |  |  | 3,392 |
|  |  | 279,946 |  |  |  | 261,702 |
Less accumulated depreciation |  |  | (167,683 | ) |  |  | (158,747 | )
|  | $ | 112,263 |  |  | $ | 102,955 |

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