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Commitments and Contingencies (Details) - Nishimura v. Gentry Homes, Ltd $ in Millions |  | 1 Months Ended
--- | --- | ---
Jul. 20, 2017 home | Apr. 30, 2017 USD ($)
Loss Contingencies [Line Items] |  |
Number of homes impacted | home | 2,400 |
Settlement amount | $ |  | $ 90

X
- Definition Loss Contingency, Number of Homes Impacted + References No definition available. + Details
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Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount awarded from other party in judgment or settlement of litigation. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |