Note 19 - Commitments and Contingencies (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Mortgage Loans in Process [Member]
Mortgage Loans Expected to be Originated on a Non-presold Basis	$ 291,600,000
Nonrefundable Cash Deposits	65,800,000
Capitalized Preacquisition and Other Development and Construction Costs	7,300,000
Remaining Purchase Price of Land Purchase and Option Contracts	$ 759,300,000
Number of Joint Ventures the Company Holds Membership Interest In	26
Number of Active Joint Ventures	12
Number of Inactive Joint Ventures	14
Number of Joint Ventures Having Project Specific Non-recourse Debt to the Company	2
Equity Method Investment, Summarized Financial Information, Non-recourse Debt	$ 31,558,000		$ 33,704,000
Outstanding Joint Venture Surety Bonds	0
Outstanding Surety Bonds	821,100,000
Surety Bonds Cost to Complete	390,100,000
Mortgage Loans in Process	$ 291,600,000
Mortgage Loans in Process, Interest Rate	4.30%
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Mortgage	$ 186,000,000
Mortgage Loans Committed to Sell to Investors	5,600,000
Mortgage Loan Repurchase Reserve	3,700,000
Mortgage Loan Repurchase Payments	100,000	$ 0
Insurance and Litigation Accruals	119,600,000		$ 125,300,000
Mortgage Loan Loss Expense Provision	$ 0	$ 0