Fair Value Disclosures (Narrative) (Details) $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($) item	Dec. 31, 2019 USD ($) item
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Inventory before impairment	$ 12,000
Number of communities impairment charges \| item	4	5
Impairment charge	$ 2,172	$ 4,783
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Inventory	$ 9,800

Number Of Communities Recorded Impairment Charges

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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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.

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- Definition

Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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