Note 14 - Senior Notes Payable - Senior Notes Payable (Details) (Parentheticals)	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
1.625% Convertible Senior Notes due May 2018 [Member]
Debt Instrument, Interest Rate, Stated Percentage	1.625%		1.625%
0.25% Convertible Senior Notes Due June 2019 [Member]
Debt Instrument, Interest Rate, Stated Percentage	0.25%		0.25%
1.25% Convertible Senior Notes Due August 2032 [Member]
Debt Instrument, Interest Rate, Stated Percentage	1.25%		1.25%
Homebuilding [Member] | 8.4% Senior Notes Due May 2017 [Member]
Debt Instrument, Interest Rate, Stated Percentage	8.40%	8.40%
Homebuilding [Member] | 8.375% Senior Notes Due May 2018 [Member]
Debt Instrument, Interest Rate, Stated Percentage	8.375%	8.375%
Homebuilding [Member] | 1.625% Convertible Senior Notes due May 2018 [Member]
Debt Instrument, Interest Rate, Stated Percentage	1.625%	1.625%
Homebuilding [Member] | 0.25% Convertible Senior Notes Due June 2019 [Member]
Debt Instrument, Interest Rate, Stated Percentage	0.25%	0.25%
Homebuilding [Member] | 6.625% Senior Notes due May 2020 [Member]
Debt Instrument, Interest Rate, Stated Percentage	6.625%	6.625%
Homebuilding [Member] | 8.375% Senior Notes Due January 2021 [Member]
Debt Instrument, Interest Rate, Stated Percentage	8.375%	8.375%
Homebuilding [Member] | 6.25% Senior Notes Due December 15, 2021 [Member]
Debt Instrument, Interest Rate, Stated Percentage	6.25%	6.25%
Homebuilding [Member] | 5.375% Senior Notes Due October 2022 [Member]
Debt Instrument, Interest Rate, Stated Percentage	5.375%	5.375%
Homebuilding [Member] | 5.875% Senior Notes Due November 2024 [Member]
Debt Instrument, Interest Rate, Stated Percentage	5.875%	5.875%
Homebuilding [Member] | 5.25% Senior Notes due June 2026 [Member]
Debt Instrument, Interest Rate, Stated Percentage	5.25%	5.25%
Homebuilding [Member] | 1.25% Convertible Senior Notes Due August 2032 [Member]
Debt Instrument, Interest Rate, Stated Percentage	1.25%	1.25%