Note 25 - Supplemental Guarantor Information - Supplemental Condensed Combining Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash and cash equivalents	$ 474,212	$ 470,139		$ 514,240	$ 286,687
Property and equipment, net	60,414	58,167
Deferred tax assets, net	21,768	37,178
Total Assets	3,338,356	3,001,077
Mortgage loans held-for-sale, net	58,500	17,800
Total Liabilities	1,555,871	1,425,077
Total Stockholders' Equity	1,782,485	1,576,000		1,407,287	1,320,070
Total Liabilities and Stockholders' Equity	3,338,356	3,001,077
Homebuilding Segment [Member]
Cash and cash equivalents	424,186	414,724		472,957
Marketable securities	0	0
Restricted cash	14,279	6,363		8,812
Trade and other receivables	65,829	52,982
Housing completed or under construction	1,036,191	952,436	$ 944,091	936,685
Land and land under development	1,330,384	1,180,558
Total Inventories	2,366,575	2,132,994
Intercompany receivables	0	0
Investment in subsidiaries	0	0
Property and equipment, net	60,414	58,167	51,709	26,439
Deferred tax assets, net	21,768	37,178	40,907	41,480
Prepaid and other assets	78,358	45,794	41,439	75,666
Total Assets	3,031,409	2,748,202
Other assets	1,288	995
Accounts payable	87,364	50,505
Accrued and other liabilities	245,940	196,247
Advances and notes payable to parent and subsidiaries	0	0
Revolving credit facility	15,000	15,000
Senior notes, net	989,422	987,967
Total Liabilities	1,337,726	1,249,719
Financial Services Segment [Member]
Cash and cash equivalents	35,747	49,052		32,471
Marketable securities	56,747	40,879
Intercompany receivables	0	0
Total Assets	306,947	252,875
Mortgage loans held-for-sale, net	197,021	149,211
Other assets	17,432	13,733	$ 13,515	9,617
Advances and notes payable to parent and subsidiaries	0	0
Total Liabilities	218,145	175,358
Accounts payable and accrued liabilities	68,529	58,543
Mortgage repurchase facility	149,616	116,815
Reportable Legal Entities [Member] | Parent Company [Member]
Cash and cash equivalents	418,822	410,127		468,718	255,679
Total Assets	2,924,942	2,674,373
Total Liabilities	1,142,457	1,098,373
Total Stockholders' Equity	1,782,485	1,576,000
Total Liabilities and Stockholders' Equity	2,924,942	2,674,373
Reportable Legal Entities [Member] | Parent Company [Member] | Homebuilding Segment [Member]
Cash and cash equivalents	418,822	410,127
Marketable securities	0	0
Restricted cash	0	0
Trade and other receivables	624	758
Housing completed or under construction	0	0
Land and land under development	0	0
Total Inventories	0	0
Intercompany receivables	1,936,075	1,735,342
Investment in subsidiaries	488,993	455,848
Property and equipment, net	23,192	23,896
Deferred tax assets, net	22,508	36,168
Prepaid and other assets	34,728	12,234
Total Assets	2,924,942	2,674,373
Accounts payable	289	0
Accrued and other liabilities	84,088	65,691
Advances and notes payable to parent and subsidiaries	53,658	29,715
Revolving credit facility	15,000	15,000
Senior notes, net	989,422	987,967
Total Liabilities	1,142,457	1,098,373
Reportable Legal Entities [Member] | Parent Company [Member] | Financial Services Segment [Member]
Cash and cash equivalents	0	0
Marketable securities	0	0
Intercompany receivables	0	0
Total Assets	0	0
Mortgage loans held-for-sale, net	0	0
Other assets	0	0
Advances and notes payable to parent and subsidiaries	0	0
Total Liabilities	0	0
Accounts payable and accrued liabilities	0	0
Mortgage repurchase facility	0	0
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Cash and cash equivalents	19,643	10,960		13,051	7,186
Total Assets	2,538,645	2,271,378
Total Liabilities	2,156,696	1,903,140
Total Stockholders' Equity	381,949	368,238
Total Liabilities and Stockholders' Equity	2,538,645	2,271,378
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member] | Homebuilding Segment [Member]
Cash and cash equivalents	5,364	4,597
Marketable securities	0	0
Restricted cash	14,279	6,363
Trade and other receivables	65,205	52,224
Housing completed or under construction	1,036,191	952,436
Land and land under development	1,330,384	1,180,558
Total Inventories	2,366,575	2,132,994
Intercompany receivables	6,370	7,369
Investment in subsidiaries	0	0
Property and equipment, net	37,222	34,271
Deferred tax assets, net	0	0
Prepaid and other assets	43,630	33,560
Total Assets	2,538,645	2,271,378
Accounts payable	87,075	50,505
Accrued and other liabilities	156,652	125,387
Advances and notes payable to parent and subsidiaries	1,912,969	1,727,248
Revolving credit facility	0	0
Senior notes, net	0	0
Total Liabilities	2,156,696	1,903,140
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member] | Financial Services Segment [Member]
Cash and cash equivalents	0	0
Marketable securities	0	0
Intercompany receivables	0	0
Total Assets	0	0
Mortgage loans held-for-sale, net	0	0
Other assets	0	0
Advances and notes payable to parent and subsidiaries	0	0
Total Liabilities	0	0
Accounts payable and accrued liabilities	0	0
Mortgage repurchase facility	0	0
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	35,747	49,052		32,471	23,822
Total Assets	353,960	276,231
Total Liabilities	246,916	188,621
Total Stockholders' Equity	107,044	87,610
Total Liabilities and Stockholders' Equity	353,960	276,231
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member] | Homebuilding Segment [Member]
Cash and cash equivalents	0	0
Marketable securities	0	0
Restricted cash	0	0
Trade and other receivables	0	0
Housing completed or under construction	0	0
Land and land under development	0	0
Total Inventories	0	0
Intercompany receivables	0	0
Investment in subsidiaries	0	0
Property and equipment, net	0	0
Deferred tax assets, net	0	0
Prepaid and other assets	0	0
Total Assets	0	0
Accounts payable	0	0
Accrued and other liabilities	0	0
Advances and notes payable to parent and subsidiaries	0	295
Revolving credit facility	0	0
Senior notes, net	0	0
Total Liabilities	0	295
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member] | Financial Services Segment [Member]
Cash and cash equivalents	35,747	49,052
Marketable securities	56,747	40,879
Intercompany receivables	47,753	22,346
Total Assets	353,960	276,231
Mortgage loans held-for-sale, net	197,021	149,211
Other assets	16,692	14,743
Advances and notes payable to parent and subsidiaries	23,571	7,799
Total Liabilities	246,916	188,326
Accounts payable and accrued liabilities	73,729	63,712
Mortgage repurchase facility	149,616	116,815
Consolidation, Eliminations [Member]
Cash and cash equivalents	0	0		$ 0	$ 0
Total Assets	(2,479,191)	(2,220,905)
Total Liabilities	(1,990,198)	(1,765,057)
Total Stockholders' Equity	(488,993)	(455,848)
Total Liabilities and Stockholders' Equity	(2,479,191)	(2,220,905)
Consolidation, Eliminations [Member] | Homebuilding Segment [Member]
Cash and cash equivalents	0	0
Marketable securities	0	0
Restricted cash	0	0
Trade and other receivables	0	0
Housing completed or under construction	0	0
Land and land under development	0	0
Total Inventories	0	0
Intercompany receivables	(1,942,445)	(1,742,711)
Investment in subsidiaries	(488,993)	(455,848)
Property and equipment, net	0	0
Deferred tax assets, net	(740)
Prepaid and other assets	0	0
Total Assets	(2,432,178)	(2,197,549)
Accounts payable	0	0
Advances and notes payable to parent and subsidiaries	(1,966,627)	(1,757,258)
Revolving credit facility	0	0
Senior notes, net	0	0
Total Liabilities	(1,961,427)	(1,752,089)
Consolidation, Eliminations [Member] | Financial Services Segment [Member]
Cash and cash equivalents	0	0
Marketable securities	0	0
Intercompany receivables	(47,753)	(22,346)
Total Assets	(47,013)	(23,356)
Mortgage loans held-for-sale, net	0	0
Other assets		(1,010)
Advances and notes payable to parent and subsidiaries	(23,571)	(7,799)
Total Liabilities	(28,771)	(12,968)
Accounts payable and accrued liabilities	(5,200)	(5,169)
Mortgage repurchase facility	0	0
Segment Reconciling Items [Member] | Homebuilding Segment [Member]
Deferred tax assets, net		1,010
Accrued and other liabilities	5,200	$ 5,169
Segment Reconciling Items [Member] | Financial Services Segment [Member]
Other assets	$ 740