Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Quarterly Results (Unaudited) (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended							12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill impairment				$ 20,200				$ 20,190	$ 0	$ 0
Adjustment to self insurance reserves	$ (34,100)		$ (60,700)					93,431	49,437	$ 35,873
Write-off of insurance receivables					$ (12,600)		$ (11,600)		(22,600)
Reserve Reversal	22,000
Federal Energy Efficient Home Credit	$ 24,000	$ 53,200						82,000
Product Warranty Expense						$ 9,000			$ 14,800
Other Homebuilding [Member]
Write-off of insurance receivables								$ (17,800)