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Summary of Signficant Accounting Policies Schedule of Inventory (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Product Information |  |  |
Inventories |  | $ 394,259 |
Inventories | $ 2,772,777 | 2,836,075 | $ 2,380,783
Aftermarket and refurbished products |  |  |
Product Information |  |  |
Inventories | 2,297,895 | 2,309,458 |
Salvage and remanufactured products |  |  |
Product Information |  |  |
Inventories | 447,908 | 503,199 |
ManufacturedProducts [Member] |  |  |
Accounting Policies [Abstract] |  |  |
Inventory, Raw Materials, Gross | 17,000 | 17,000 |
Inventory, Work in Process, Gross | 3,000 | 2,000 |
Inventory, Finished Goods, Gross | 6,000 | 4,000 |
Product Information |  |  |
Inventories | $ 26,974 | $ 23,418 |

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