Note 20 - Supplemental Guarantor Information - Supplemental Condensed Combining Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Inventory impairments	$ 0	$ (610)
Gross profit	138,438	122,116
Pretax income (loss)	48,562	55,606
(Provision) benefit for income taxes	(11,802)	(15,056)
Net Income	36,760	40,550
Other comprehensive income related to available-for-sale securities, net of tax	0	0
Comprehensive income	36,760	40,550
Homebuilding Segment [Member]
Revenues	697,085	647,278
Cost of sales	(558,647)	(524,552)
Inventory impairments	0	(610)
Selling, general and administrative expenses	(89,321)	(82,261)
Equity income of subsidiaries	0	0
Interest and other income	1,889	2,391
Other income (expense), net	(1,337)	(1,191)
Pretax income (loss)	49,669	41,055
Financial Services Segment [Member]
Revenues	21,886	17,404
Other income (expense), net	(12,064)	6,104
Pretax income (loss)	(1,107)	14,551
Reportable Legal Entities [Member] | Parent Company [Member]
Gross profit	0	0
Pretax income (loss)	34,245	37,143
(Provision) benefit for income taxes	2,515	3,407
Net Income	36,760	40,550
Other comprehensive income related to available-for-sale securities, net of tax	0	0
Comprehensive income	36,760	40,550
Reportable Legal Entities [Member] | Parent Company [Member] | Homebuilding Segment [Member]
Revenues	0	0
Cost of sales	0	0
Inventory impairments	0	0
Selling, general and administrative expenses	(10,782)	(17,438)
Equity income of subsidiaries	43,236	52,165
Interest and other income	1,783	2,409
Other income (expense), net	8	7
Pretax income (loss)	34,245	37,143
Reportable Legal Entities [Member] | Parent Company [Member] | Financial Services Segment [Member]
Pretax income (loss)	0	0
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Gross profit	138,438	122,116
Pretax income (loss)	58,976	56,372
(Provision) benefit for income taxes	(14,333)	(15,264)
Net Income	44,643	41,108
Other comprehensive income related to available-for-sale securities, net of tax	0	0
Comprehensive income	44,643	41,108
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member] | Homebuilding Segment [Member]
Revenues	697,085	647,278
Cost of sales	(558,647)	(524,552)
Inventory impairments	0	(610)
Selling, general and administrative expenses	(78,408)	(64,701)
Equity income of subsidiaries	0	0
Interest and other income	291	155
Other income (expense), net	(1,345)	(1,198)
Pretax income (loss)	58,976	56,372
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member] | Financial Services Segment [Member]
Pretax income (loss)	0	0
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Gross profit	0	0
Pretax income (loss)	(1,423)	14,256
(Provision) benefit for income taxes	16	(3,199)
Net Income	(1,407)	11,057
Other comprehensive income related to available-for-sale securities, net of tax	0	0
Comprehensive income	(1,407)	11,057
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member] | Homebuilding Segment [Member]
Revenues	0	0
Cost of sales	0	0
Inventory impairments	0	0
Selling, general and administrative expenses	0	0
Equity income of subsidiaries	0	0
Interest and other income	0	0
Other income (expense), net	0	0
Pretax income (loss)	0	0
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member] | Financial Services Segment [Member]
Pretax income (loss)	(1,423)	14,256
Consolidation, Eliminations [Member]
Gross profit	0	0
Pretax income (loss)	(43,236)	(52,165)
(Provision) benefit for income taxes	0	0
Net Income	(43,236)	(52,165)
Other comprehensive income related to available-for-sale securities, net of tax	0	0
Comprehensive income	(43,236)	(52,165)
Consolidation, Eliminations [Member] | Homebuilding Segment [Member]
Revenues	0	0
Cost of sales	0	0
Inventory impairments	0	0
Equity income of subsidiaries	(43,236)	(52,165)
Interest and other income	(185)	(173)
Other income (expense), net	0	0
Pretax income (loss)	(43,552)	(52,460)
Consolidation, Eliminations [Member] | Financial Services Segment [Member]
Pretax income (loss)	316	295
Segment Reconciling Items [Member] | Homebuilding Segment [Member]
Selling, general and administrative expenses	$ (131)	$ (122)