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Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Oct. 31, 2019 | Oct. 31, 2018
Amount outstanding in letters of credit | $ 73,000 |
Surety Bonds Outstanding | 10,600 |
Holland Creek Metropolitan District [Member] |  |
Credit-enhanced bonds issued amount | 6,300 |
Amount outstanding in letters of credit | 6,400 |
Red Sky Ranch Metropolitan District [Member] |  |
Other long-term liabilities | $ 2,000 | $ 2,000
Estimated cessation date of capital improvement fee payment obligation | Jul. 31, 2031 |
Employee Housing Bonds [Member] |  |
Amount outstanding in letters of credit | $ 53,400 |
Workers' Compensation and General Liability Related to Construction and Development Activities [Member] |  |
Amount outstanding in letters of credit | $ 19,600 |

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