Note 3 - Segment Reporting - Reconciliation of Pretax Operating Income From Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Pretax income	$ 55,606	$ 50,532
Homebuilding Segment [Member]
Pretax income	41,055	40,461
Homebuilding Segment [Member] | Operating Segments [Member] | Reportable Segment, West [Member]
Pretax income	33,200	24,373
Homebuilding Segment [Member] | Operating Segments [Member] | Reportable Segment, Mountain [Member]
Pretax income	21,714	24,185
Homebuilding Segment [Member] | Operating Segments [Member] | Reportable Segment, East [Member]
Pretax income	1,473	3,375
Homebuilding Segment [Member] | Corporate, Non-Segment [Member]
Pretax income	(15,332)	(11,472)
Financial Services Segment [Member]
Pretax income	14,551	10,071
Financial Services Segment [Member] | Operating Segments [Member] | Mortgage Operations [Member]
Pretax income	4,993	7,520
Financial Services Segment [Member] | Operating Segments [Member] | Other Financial Services [Member]
Pretax income	$ 9,558	$ 2,551