Note 16 - Commitments and Contingencies (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2017 USD ($)
Surety Bonds, Outstanding, Amount	$ 184.9
Letters of Credit Outstanding, Amount	65.5
Estimated Cost Related to Bonds	33.0
Estimated Cost Related to Letters of Credit	25.3
Option Contracts [Member]
Letters of Credit Outstanding, Amount	3.6
Earnest Money Deposits	$ 11.4
Right to Acquire Lots Under Options Contract	6,306
HomeAmerican [Member]
Letters of Credit Outstanding, Amount	$ 31.6