Note 18 - Carrying Values and Estimated Fair Value of Other Financial Instruments (Details) - Financial Services [Member] - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Inputs, Level 2 [Member]
Mortgage loans held for investment, net	$ 21,553	$ 22,704
Senior notes payable	21,553	22,704
Senior and convertible senior notes payable, net	3,376,910	3,462,016
Senior and convertible senior notes payable, net	3,639,573	3,675,276
Mortgage loans held for investment, net	$ 21,553	$ 22,704