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Summary of Significant Accounting Policies Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Homebuilding operations percent of total revenue |  |  |  |  |  |  |  |  | 98.00% | 98.00% | 97.00%
Revenue | $ 742,150 | $ 653,345 | $ 623,686 | $ 481,109 | $ 722,485 | $ 567,842 | $ 558,098 | $ 437,857 | $ 2,500,290 | $ 2,286,282 | $ 1,961,971
Gain (Loss) on Hedging Activity |  |  |  |  |  |  |  |  | (12,100) | 3,600 | 700
Construction [Member] |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 2,420,348 | 2,217,197 | 1,878,572
Land [Member] |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 24,619 | 16,889 | 33,706
Financial Services Sector [Member] |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 55,323 | 52,196 | 49,693
Financial Services Sector [Member] |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 55,323 | $ 52,196 | $ 49,693

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