Note 3 - Segment Reporting - Total Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets	$ 3,034,919	$ 3,001,077
Homebuilding Segment [Member]
Assets	2,810,986	2,748,202
Homebuilding Segment [Member] | Corporate, Non-Segment [Member]
Assets	514,104	484,193
Homebuilding Segment [Member] | Reportable Segment, West [Member] | Operating Segments [Member]
Assets	1,307,761	1,301,374
Homebuilding Segment [Member] | Reportable Segment, Mountain [Member] | Operating Segments [Member]
Assets	818,451	793,150
Homebuilding Segment [Member] | Reportable Segment, East [Member] | Operating Segments [Member]
Assets	170,670	169,485
Financial Services Segment [Member]
Assets	223,933	252,875
Financial Services Segment [Member] | Mortgage Operations [Member] | Operating Segments [Member]
Assets	123,139	159,677
Financial Services Segment [Member] | Other Financial Services [Member] | Operating Segments [Member]
Assets	$ 100,794	$ 93,198