Note 3 - Segment Reporting - Total Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets	$ 3,158,579	$ 3,001,077
Homebuilding Segment [Member]
Assets	2,924,899	2,748,202
Homebuilding Segment [Member] | Corporate, Non-Segment [Member]
Assets	379,017	484,193
Homebuilding Segment [Member] | Reportable Segment, West [Member] | Operating Segments [Member]
Assets	1,481,549	1,301,374
Homebuilding Segment [Member] | Reportable Segment, Mountain [Member] | Operating Segments [Member]
Assets	873,656	793,150
Homebuilding Segment [Member] | Reportable Segment, East [Member] | Operating Segments [Member]
Assets	190,677	169,485
Financial Services Segment [Member]
Assets	233,680	252,875
Financial Services Segment [Member] | Mortgage Operations [Member] | Operating Segments [Member]
Assets	131,554	159,677
Financial Services Segment [Member] | Other Financial Services [Member] | Operating Segments [Member]
Assets	$ 102,126	$ 93,198