Note 16 - Commitments and Contingencies (Details Textual) $ in Millions	6 Months Ended
	Jun. 30, 2017 USD ($)
Surety Bonds, Outstanding, Amount	$ 175.8
Letters of Credit Outstanding, Amount	64.6
Estimated Cost Related to Bonds	24.1
Estimated Cost Related to Letters of Credit	32.3
Option Contracts [Member]
Earnest Money Deposits	14.5
Letters of Credit Outstanding, Amount	$ 3.1
Right to Acquire Lots Under Options Contract	5,090
HomeAmerican [Member]
Letters of Credit Outstanding, Amount	$ 31.8