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Purchase Price Allocation (Detail) - USD ($) $ in Thousands | 1 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 27, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Goodwill |  | $ 311,044 | $ 313,626 | $ 317,464 | $ 148,367
Acquisition, net of cash acquired |  | $ 0 | $ 323,487 |  |
Supreme Industries Inc. [Member] |  |  |  |  |
Cash | $ 36,878 |  |  |  |
Accounts receivable | 25,196 |  |  |  |
Inventories | 33,471 |  |  |  |
Prepaid expense and other | 23,916 |  |  |  |
Property, plant, and equipment | 59,891 |  |  |  |
Intangibles | 161,200 |  |  |  |
Goodwill | 167,714 |  |  |  |
Other assets | 127 |  |  |  |
Total assets acquired | 508,393 |  |  |  |
Current portion of long term debt | 7,167 |  |  |  |
Accounts payable | 10,546 |  |  |  |
Other accrued liabilites | 55,518 |  |  |  |
Deferred income taxes | 71,880 |  |  |  |
Long term liabilities | 2,918 |  |  |  |
Total liabilities assumed | 148,029 |  |  |  |
Net assets acquired | 360,364 |  |  |  |
Acquisition, net of cash acquired | $ 323,486 |  |  |  |

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