Note 16 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Surety Bonds, Outstanding, Amount	$ 178.8
Letters of Credit Outstanding, Amount	52.6
Estimated Cost Related to Bonds	48.7
Estimated Cost Related to Letters of Credit	18.2
Estimated Litigation Liability	1.9	$ 3.6
Selling, General and Administrative Expenses [Member]
Operating Leases, Rent Expense	5.4	$ 5.0	$ 4.9
HomeAmerican [Member]
Letters of Credit Outstanding, Amount	$ 29.6