Note 16 - Disclosures About Fair Value - Financial Instruments With Fair Value Option Not Elected (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financial Services [Member] | Reported Value Measurement [Member]
Mortgage loans held for investment, net	$ 25,510	$ 24,924
Financial Services [Member] | Estimate of Fair Value Measurement [Member]
Mortgage loans held for investment, net	25,510	24,924
Homebuilding [Member] | Reported Value Measurement [Member]
Senior and convertible senior notes payable, net	3,483,388	3,392,208
Homebuilding [Member] | Estimate of Fair Value Measurement [Member]
Senior and convertible senior notes payable, net	$ 3,753,098	$ 3,617,838