Note 16 - Commitments and Contingencies (Details Textual) $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2020	Mar. 31, 2020 USD ($)
Surety Bonds, Outstanding, Amount		$ 284.0
Letters of Credit Outstanding, Amount		96.6
Estimated Cost Related to Bonds		152.4
Estimated Cost Related to Letters of Credit		$ 51.2
Right to Acquire Lots Under Options Contract		8,533
COVID-19 Pandemic [Member]
Net New Orders, Increase (Decrease) in Year-over-year Percentage	(53.00%)
Option Contracts [Member]
Letters of Credit Outstanding, Amount		$ 8.2
Earnest Money Deposits		21.4
HomeAmerican [Member]
Letters of Credit Outstanding, Amount		$ 70.9