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Business Combination (Details) - Grand Design [Member] - USD ($) $ / shares in Units, $ in Thousands | Apr. 11, 2017 | Nov. 08, 2016
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Business Acquisition [Line Items] |  |
Cash |  | $ 396,442
Winnebago shares: 4,586,555 at $27.05 per share |  | 124,066
Total |  | $ 520,508
Shares issued for acquisition |  | 4,586,555
Share price (in dollars per share) |  | $ 27.05
Shares sold after acquisition | 2,293,277 |

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