Note 3 - Segment Reporting - Total Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets	$ 3,373,712	$ 3,338,356
Homebuilding Segment [Member]
Assets	3,149,392	3,031,409
Homebuilding Segment [Member] | Corporate, Non-Segment [Member]
Assets	466,192	505,507
Homebuilding Segment [Member] | Reportable Segment, West [Member] | Operating Segments [Member]
Assets	1,559,410	1,461,645
Homebuilding Segment [Member] | Reportable Segment, Mountain [Member] | Operating Segments [Member]
Assets	907,727	869,665
Homebuilding Segment [Member] | Reportable Segment, East [Member] | Operating Segments [Member]
Assets	216,063	194,592
Financial Services Segment [Member]
Assets	224,320	306,947
Financial Services Segment [Member] | Mortgage Operations [Member] | Operating Segments [Member]
Assets	154,546	209,946
Financial Services Segment [Member] | Other Financial Services [Member] | Operating Segments [Member]
Assets	$ 69,774	$ 97,001