Note 4 - Segment Reporting - Total Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets	$ 3,001,077	$ 2,780,292
Homebuilding Segment [Member]
Assets	2,748,202	2,558,086
Homebuilding Segment [Member] | Corporate, Non-Segment [Member]
Assets	484,193	597,589
Homebuilding Segment [Member] | Reportable Segment, West [Member] | Operating Segments [Member]
Assets	1,301,374	1,084,756
Homebuilding Segment [Member] | Reportable Segment, Mountain [Member] | Operating Segments [Member]
Assets	793,150	674,057
Homebuilding Segment [Member] | Reportable Segment, East [Member] | Operating Segments [Member]
Assets	169,485	201,684
Financial Services Segment [Member]
Assets	252,875	222,206
Financial Services Segment [Member] | Mortgage Operations [Member] | Operating Segments [Member]
Assets	159,677	152,345
Financial Services Segment [Member] | Other Financial Services [Member] | Operating Segments [Member]
Assets	$ 93,198	$ 69,861