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Inventory (Summary of Interests in Land Option Agreements) (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Deposits and Pre-acquisition Costs | $ 423,112 | $ 404,922
Remaining Purchase Price | 6,019,747 | 5,457,878
Land options with VIEs |  |
Variable Interest Entity [Line Items] |  |
Deposits and Pre-acquisition Costs | 185,789 | 179,604
Remaining Purchase Price | 2,577,792 | 2,329,187
Other land options |  |
Variable Interest Entity [Line Items] |  |
Deposits and Pre-acquisition Costs | 237,323 | 225,318
Remaining Purchase Price | $ 3,441,955 | $ 3,128,691

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