Note 5 - Accumulated Other Comprehensive Income - Reclassifications Out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Other-than-temporary impairment of marketable securities	$ (100)	$ (300)	$ (182)	$ (719)
Income before income taxes	51,894	40,458	88,254	54,731
Provision for income taxes	(18,023)	(13,545)	(32,134)	(18,255)
Net income	33,871	26,913	56,120	36,476
Homebuilding Segment [Member]
Interest and other income	2,847	2,553	5,174	3,489
Other-than-temporary impairment of marketable securities	(1)	(288)	(51)	(719)
Income before income taxes	40,163	31,406	65,514	40,062
Financial Services Segment [Member]
Interest and other income	1,238	772	2,217	1,613
Other-than-temporary impairment of marketable securities	(80)		(131)
Income before income taxes	11,731	9,052	22,740	14,669
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Income before income taxes	1,116	889	1,576	(457)
Provision for income taxes	(424)	(337)	(599)	174
Net income	692	552	977	(283)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Homebuilding Segment [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Interest and other income	889	1,177	1,411	262
Other-than-temporary impairment of marketable securities	(1)	(288)	(51)	(719)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Financial Services Segment [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Interest and other income	308		347
Other-than-temporary impairment of marketable securities	$ (80)		$ (131)