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Acquisition and Goodwill (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |
Acquisition, net of cash acquired |  | $ 0 | $ (100,960) |
Goodwill |  | 16,400 |  | $ 16,400
Pinnacle Homes [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquisition, net of cash acquired | $ (101,000) |  |  |
Goodwill |  | $ 16,400 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | $ 84,600 |  |  |

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