Note 3 - Segment Reporting - Total Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets	$ 3,086,097	$ 3,001,077
Homebuilding Segment [Member]
Assets	2,856,047	2,748,202
Homebuilding Segment [Member] | Corporate, Non-Segment [Member]
Assets	481,844	484,193
Homebuilding Segment [Member] | Reportable Segment, West [Member] | Operating Segments [Member]
Assets	1,368,888	1,301,374
Homebuilding Segment [Member] | Reportable Segment, Mountain [Member] | Operating Segments [Member]
Assets	816,993	793,150
Homebuilding Segment [Member] | Reportable Segment, East [Member] | Operating Segments [Member]
Assets	188,322	169,485
Financial Services Segment [Member]
Assets	230,050	252,875
Financial Services Segment [Member] | Mortgage Operations [Member] | Operating Segments [Member]
Assets	122,351	159,677
Financial Services Segment [Member] | Other Financial Services [Member] | Operating Segments [Member]
Assets	$ 107,699	$ 93,198