Note 10 - Fair Value Disclosures (Details Textual) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Impairment of Real Estate					$ 19,000	$ 10,200	$ 10,000
Inventory Write-down					19,000	10,200	10,000
Impaired Inventory, Ending Balance			$ 81,622		47,178	81,622	57,845
Unconsolidated Joint Ventures [Member]
Equity Method Investment, Other than Temporary Impairment	$ 20,000	$ 2,300			22,300	0	1,100
Home Building [Member]
Inventory Write-down	$ 19,000		6,600	$ 1,700	19,000	8,300	10,000
Land [Member]
Impairment of Real Estate						1,900
Inventory Write-down				$ 1,900	0	1,900	$ 0
Senior Notes [Member] | 7.25% Senior Notes Due 2025 [Member]
Debt Issuance Costs, Net, Total					$ 5,100
Senior Notes [Member] | Senior Notes Due 2022 [Member]
Debt Issuance Costs, Net, Total			3,000			3,000
Debt Instrument, Unamortized Discount, Total			1,100			1,100
Debt Instrument, Unamortized Premium, Total			$ 900			$ 900