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Inventory (Summary of Interests in Land Option Agreements) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Deposits and Pre-acquisition Costs	$ 326,920	$ 291,864
Remaining Purchase Price	4,755,836	3,773,568
Land options with VIEs
Variable Interest Entity [Line Items]
Deposits and Pre-acquisition Costs	126,617	126,900
Remaining Purchase Price	1,866,043	1,586,551
Other land options
Variable Interest Entity [Line Items]
Deposits and Pre-acquisition Costs	200,303	164,964
Remaining Purchase Price	$ 2,889,793	$ 2,187,017

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- Definition

Remaining Purchase Price Of All Land Option Agreements

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Carrying amount of an option or options to acquire real property.

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