Note 15 - Senior Notes Payable (Details) (Parentheticals)	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
10.75% Senior Notes Due September 2016 [Member] | Homebuilding [Member]
Interest rate	10.75%	10.75%
8.4% Senior Notes Due May 2017 [Member] | Homebuilding [Member]
Interest rate	8.40%	8.40%
8.375% Senior Notes Due May 2018 [Member] | Homebuilding [Member]
Interest rate	8.375%	8.375%
1.625% convertible senior notes due 2018 [Member] | Homebuilding [Member]
Interest rate	1.625%	1.625%
1.625% convertible senior notes due 2018 [Member]
Interest rate	1.625%		1.625%
0.25% Convertible Senior Notes Due June 2019 [Member] | Homebuilding [Member]
Interest rate	0.25%	0.25%
0.25% Convertible Senior Notes Due June 2019 [Member]
Interest rate	0.25%		0.25%
6.625% Senior Notes Due December 2021 [Member] | Homebuilding [Member]
Interest rate	6.625%	6.625%
8.375% Senior Notes Due January 2021 [Member] | Homebuilding [Member]
Interest rate	8.375%	8.375%
6.25% Senior Notes Due December 15, 2021 [Member] | Homebuilding [Member]
Interest rate	6.25%	6.25%
5.375% Senior Notes Due October 2022 [Member] | Homebuilding [Member]
Interest rate	5.375%	5.375%
5/875% Senior Notes Due November 2024 [Member] | Homebuilding [Member]
Interest rate	5.875%	5.875%
1.25% Convertible Senior Notes Due August 2032 [Member] | Homebuilding [Member]
Interest rate	1.25%	1.25%
1.25% Convertible Senior Notes Due August 2032 [Member]
Interest rate	1.25%		1.25%