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Inventory (Summary of Interests in Land Option Agreements) (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Deposits and Pre-acquisition Costs | $ 244,568 | $ 207,987
Remaining Purchase Price | 2,738,855 | 2,462,579
Land options with VIEs |  |
Variable Interest Entity [Line Items] |  |
Deposits and Pre-acquisition Costs | 85,173 | 78,889
Remaining Purchase Price | 1,167,087 | 977,480
Other land options |  |
Variable Interest Entity [Line Items] |  |
Deposits and Pre-acquisition Costs | 159,395 | 129,098
Remaining Purchase Price | $ 1,571,768 | $ 1,485,099

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- Definition Remaining Purchase Price Of All Land Option Agreements + References No definition available. + Details
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- Definition Carrying amount of an option or options to acquire real property. + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |