Note 21 - Supplemental Guarantor Information - Supplemental Condensed Combining Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2019		Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Cash and cash equivalents	$ 459,801				$ 470,139	$ 433,323		$ 514,240
Operating lease right-of-use asset				$ 33,500
Deferred tax asset, net	29,400				37,200
Assets	3,086,097				3,001,077
Operating lease liabilities	33,340	[1]		$ 34,300
Total Liabilities	1,424,946				1,425,077
Total Stockholders' Equity	1,661,151		$ 1,610,706		1,576,000	1,489,841	$ 1,432,493	1,407,287
Total Liabilities and Stockholders' Equity	3,086,097				3,001,077
Homebuilding Segment [Member]
Cash and cash equivalents	390,061				414,724	378,219
Restricted cash	12,911				6,363	7,443
Trade and other receivables	54,780				52,982
Housing completed or under construction	1,071,181				952,436
Land and land under development	1,156,009				1,180,558
Total inventories	2,227,190				2,132,994
Intercompany receivables	0				0
Investment in subsidiaries	0				0
Property and equipment, net	62,888				58,167
Operating lease right-of-use asset	31,600				0
Deferred tax asset, net	29,441				37,178
Prepaid and other assets	47,176				45,794
Assets	2,856,047				2,748,202
Marketable securities	48,105				40,879
Accounts payable	58,986				50,505
Accrued liabilities	186,500				196,247
Operating lease liabilities	32,240				0
Advances and notes payable to parent and subsidiaries	0				0
Revolving credit facility	15,000				15,000
Senior notes, net	988,683				987,967
Total Liabilities	1,281,409				1,249,719
Metropolitan district bond securities (related party)					0
Financial Services Segment [Member]
Cash and cash equivalents	56,829				49,052	47,661
Intercompany receivables	0				0
Prepaid and other assets	15,779				13,733
Assets	230,050				252,875
Marketable securities	48,105				40,879
Mortgage loans held-for-sale, net	109,337				149,211
Advances and notes payable to parent and subsidiaries	0				0
Total Liabilities	143,537				175,358
Accounts payable and other liabilities	60,498				58,543
Mortgage repurchase facility	83,039				116,815
Reportable Legal Entities [Member] | Parent Company [Member]
Cash and cash equivalents	384,094				410,127	373,344		468,718
Assets	2,766,524				2,674,373
Total Liabilities	1,105,373				1,098,373
Total Stockholders' Equity	1,661,151				1,576,000
Total Liabilities and Stockholders' Equity	2,766,524				2,674,373
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Cash and cash equivalents	18,878				10,960	12,318		13,051
Assets	2,388,100				2,271,378
Total Liabilities	2,152,675				1,903,140
Total Stockholders' Equity	235,425				368,238
Total Liabilities and Stockholders' Equity	2,388,100				2,271,378
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	56,829				49,052	47,661		32,471
Assets	251,925				276,231
Total Liabilities	156,186				188,621
Total Stockholders' Equity	95,739				87,610
Total Liabilities and Stockholders' Equity	251,925				276,231
Reportable Legal Entities [Member] | Homebuilding Segment [Member] | Parent Company [Member]
Cash and cash equivalents	384,094				410,127
Restricted cash	0				0
Trade and other receivables	1,203				758
Housing completed or under construction	0				0
Land and land under development	0				0
Total inventories	0				0
Intercompany receivables	1,959,457				1,735,342
Investment in subsidiaries	331,164				455,848
Property and equipment, net	23,830				23,896
Operating lease right-of-use asset	25,333
Deferred tax asset, net	29,765				36,168
Prepaid and other assets	11,678				12,234
Assets	2,766,524				2,674,373
Accounts payable	5				0
Accrued liabilities	46,771				65,691
Operating lease liabilities	25,973
Advances and notes payable to parent and subsidiaries	28,941				29,715
Revolving credit facility	15,000				15,000
Senior notes, net	988,683				987,967
Total Liabilities	1,105,373				1,098,373
Metropolitan district bond securities (related party)					0
Reportable Legal Entities [Member] | Homebuilding Segment [Member] | Guarantor Subsidiaries [Member]
Cash and cash equivalents	5,967				4,597
Restricted cash	12,911				6,363
Trade and other receivables	53,577				52,224
Housing completed or under construction	1,071,181				952,436
Land and land under development	1,156,009				1,180,558
Total inventories	2,227,190				2,132,994
Intercompany receivables	7,632				7,369
Investment in subsidiaries	0				0
Property and equipment, net	39,058				34,271
Operating lease right-of-use asset	6,267
Deferred tax asset, net	0				0
Prepaid and other assets	35,498				33,560
Assets	2,388,100				2,271,378
Accounts payable	58,981				50,505
Accrued liabilities	136,774				125,387
Operating lease liabilities	6,267
Advances and notes payable to parent and subsidiaries	1,950,653				1,727,248
Revolving credit facility	0				0
Senior notes, net	0				0
Total Liabilities	2,152,675				1,903,140
Metropolitan district bond securities (related party)					0
Reportable Legal Entities [Member] | Homebuilding Segment [Member] | Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	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
Operating lease right-of-use asset	0
Deferred tax asset, net	0				0
Prepaid and other assets	0				0
Assets	0				0
Accounts payable	0				0
Accrued liabilities	0				0
Operating lease liabilities	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
Metropolitan district bond securities (related party)					0
Reportable Legal Entities [Member] | Financial Services Segment [Member] | Parent Company [Member]
Cash and cash equivalents	0				0
Intercompany receivables	0				0
Prepaid and other assets	0				0
Assets	0				0
Marketable securities	0				0
Mortgage loans held-for-sale, net	0				0
Advances and notes payable to parent and subsidiaries	0				0
Total Liabilities	0				0
Accounts payable and other liabilities	0				0
Mortgage repurchase facility	0				0
Reportable Legal Entities [Member] | Financial Services Segment [Member] | Guarantor Subsidiaries [Member]
Cash and cash equivalents	0				0
Intercompany receivables	0				0
Prepaid and other assets	0				0
Assets	0				0
Marketable securities	0				0
Mortgage loans held-for-sale, net	0				0
Advances and notes payable to parent and subsidiaries	0				0
Total Liabilities	0				0
Accounts payable and other liabilities	0				0
Mortgage repurchase facility	0				0
Reportable Legal Entities [Member] | Financial Services Segment [Member] | Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	56,829				49,052
Intercompany receivables	22,199				22,346
Prepaid and other assets	15,455				14,743
Assets	251,925				276,231
Marketable securities	48,105				40,879
Mortgage loans held-for-sale, net	109,337				149,211
Advances and notes payable to parent and subsidiaries	9,694				7,799
Total Liabilities	156,186				188,326
Accounts payable and other liabilities	63,453				63,712
Mortgage repurchase facility	83,039				116,815
Consolidation, Eliminations [Member]
Cash and cash equivalents	0				0	$ 0		$ 0
Assets	(2,320,452)				(2,220,905)
Total Liabilities	(1,989,288)				(1,765,057)
Total Stockholders' Equity	(331,164)				(455,848)
Total Liabilities and Stockholders' Equity	(2,320,452)				(2,220,905)
Consolidation, Eliminations [Member] | Homebuilding Segment [Member]
Cash and cash equivalents	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	(1,967,089)				(1,742,711)
Investment in subsidiaries	(331,164)				(455,848)
Property and equipment, net	0				0
Operating lease right-of-use asset	0
Deferred tax asset, net	(324)				1,010
Prepaid and other assets	0				0
Assets	(2,298,577)				(2,197,549)
Accounts payable	0				0
Accrued liabilities	2,955				5,169
Operating lease liabilities	0
Advances and notes payable to parent and subsidiaries	(1,979,594)				(1,757,258)
Revolving credit facility	0				0
Senior notes, net	0				0
Total Liabilities	(1,976,639)				(1,752,089)
Metropolitan district bond securities (related party)					0
Consolidation, Eliminations [Member] | Financial Services Segment [Member]
Cash and cash equivalents	0				0
Intercompany receivables	(22,199)				(22,346)
Prepaid and other assets	324				(1,010)
Assets	(21,875)				(23,356)
Marketable securities	0				0
Mortgage loans held-for-sale, net	0				0
Advances and notes payable to parent and subsidiaries	(9,694)				(7,799)
Total Liabilities	(12,649)				(12,968)
Accounts payable and other liabilities	(2,955)				(5,169)
Mortgage repurchase facility	$ 0				$ 0

[1] Financial services operating lease liabilities of $1.1 million are included as a component of accrued liabilities in the financial services  section of our consolidated balance sheet at June 30, 2019.