Note 16 - Commitments and Contingencies (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)
Surety Bonds, Outstanding, Amount	$ 173.3
Letters of Credit Outstanding, Amount	52.9
Estimated Cost Related to Bonds	43.4
Estimated Cost Related to Letters of Credit	20.0
Option Contracts [Member]
Letters of Credit Outstanding, Amount	2.1
Earnest Money Deposits	$ 8.0
Right to Acquire Lots Under Options Contract	3,032
HomeAmerican [Member]
Letters of Credit Outstanding, Amount	$ 27.8