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Inventories (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Inventories carried at LIFO: |  |
Finished goods | $ 48,471 | $ 43,439
Raw materials, production parts and work-in-process | 28,994 | 23,694
LIFO reserve | (30,668) | (28,429)
Total LIFO inventories | 46,797 | 38,704
Inventories carried at FIFO: |  |
Finished goods | 53,138 | 54,161
Raw materials, production parts and work-in-process | 39,858 | 34,829
Total FIFO inventories | 92,996 | 88,990
Total inventories | $ 139,793 | $ 127,694

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