Supplemental Guarantor Information Supplemental Condensed Consolidated Statement of Cash Flows (Details) - USD ($) $ in Thousands		12 Months Ended
	Oct. 23, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net Cash Provided by (Used in) Operating Activities		$ (139,685)	$ (90,863)	$ (42,812)
Purchases of property and equipment		(246)	(195)	(439)
Cash assumed from joint venture at consolidation		0	995	2,610
Contributions and advances to unconsolidated joint ventures		(15,066)	(27,479)	(15,088)
Contributions to Subsidiaries from Corporate		0	0	0
Distributions of Equity from Subsidiaries		0	0	0
Distributions of capital and repayment of advances from unconsolidated joint ventures		15,436	15,577	15,307
Interest collected on advances to unconsolidated joint ventures		178	552
Net Cash Provided by (Used in) Investing Activities		302	(10,550)	2,390
Borrowings from credit facility		150,000	88,000	223,050
Repayments of credit facility		(82,500)	(206,000)	(179,974)
Proceeds from senior notes		0	324,465	0
Borrowings from other notes payable		0	0	343
Repayments of other notes payable	$ 0		(4,110)	(15,636)
Payment of debt issuance costs		0	(7,565)	(1,064)
Cash distributions to non-controlling interest in subsidiary		0	0	(725)
Contributions to subsidiaries from corporate		0	0	0
Distributions to Corporate from Subsidiaries		0	0	0
Repurchase of common stock		(8,563)	0	0
Tax withholding paid on behalf of employees for stock awards		(982)	(590)	(648)
Excess income tax benefit from stock-based compensation		0	0	(97)
Proceeds from exercise of stock options		0	102	0
Net Cash Provided by (Used in) Financing Activities		57,955	194,302	25,249
Net (decrease) increase in cash, cash equivalents and restricted cash		(81,428)	92,889	(15,173)
Cash, cash equivalents and restricted cash – end of period		42,542	123,970	31,081	$ 46,254
Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities		(71,789)	(41,900)	(12,149)
Purchases of property and equipment		(197)	(124)	(246)
Cash assumed from joint venture at consolidation			995	2,610
Contributions and advances to unconsolidated joint ventures		(15,066)	(27,479)	(15,088)
Contributions to Subsidiaries from Corporate		0	0	0
Distributions of Equity from Subsidiaries		0	0	725
Distributions of capital and repayment of advances from unconsolidated joint ventures		15,436	15,577	15,307
Interest collected on advances to unconsolidated joint ventures		178	552
Net Cash Provided by (Used in) Investing Activities		351	(10,479)	3,308
Borrowings from credit facility		0	0	0
Repayments of credit facility		0	0	0
Proceeds from senior notes			0
Borrowings from other notes payable				0
Repayments of other notes payable			(4,110)	(13,135)
Payment of debt issuance costs			0	0
Cash distributions to non-controlling interest in subsidiary				0
Contributions to subsidiaries from corporate		249,435	275,794	225,169
Distributions to Corporate from Subsidiaries		(188,675)	(209,536)	(216,286)
Repurchase of common stock		0
Tax withholding paid on behalf of employees for stock awards		0	0	0
Excess income tax benefit from stock-based compensation				0
Proceeds from exercise of stock options			0
Net Cash Provided by (Used in) Financing Activities		60,760	62,148	(4,252)
Net (decrease) increase in cash, cash equivalents and restricted cash		(10,678)	9,769	(13,093)
Cash, cash equivalents and restricted cash – end of period		13,518	24,196	14,427	27,520
Non-Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities		(41)	(81)	3,272
Purchases of property and equipment		0	0	0
Cash assumed from joint venture at consolidation			0	0
Contributions and advances to unconsolidated joint ventures		0	0	0
Contributions to Subsidiaries from Corporate		0	0	0
Distributions of Equity from Subsidiaries		0	0	0
Distributions of capital and repayment of advances from unconsolidated joint ventures		0	0	0
Interest collected on advances to unconsolidated joint ventures		0	0
Net Cash Provided by (Used in) Investing Activities		0	0	0
Borrowings from credit facility		0	0	0
Repayments of credit facility		0	0	0
Proceeds from senior notes			0
Borrowings from other notes payable				343
Repayments of other notes payable			0	(2,501)
Payment of debt issuance costs			0	0
Cash distributions to non-controlling interest in subsidiary				(725)
Contributions to subsidiaries from corporate		0	0	0
Distributions to Corporate from Subsidiaries		0	0	(725)
Repurchase of common stock		0
Tax withholding paid on behalf of employees for stock awards		0	0	0
Excess income tax benefit from stock-based compensation				0
Proceeds from exercise of stock options			0
Net Cash Provided by (Used in) Financing Activities		0	0	(3,608)
Net (decrease) increase in cash, cash equivalents and restricted cash		(41)	(81)	(336)
Cash, cash equivalents and restricted cash – end of period		147	188	269	605
Parent Company [Member]
Net Cash Provided by (Used in) Operating Activities		(63,076)	(31,824)	(7,041)
Purchases of property and equipment		(49)	(71)	(193)
Cash assumed from joint venture at consolidation			0	0
Contributions and advances to unconsolidated joint ventures		0	0	0
Contributions to Subsidiaries from Corporate		(249,435)	(275,794)	(225,169)
Distributions of Equity from Subsidiaries		183,896	192,478	189,392
Distributions of capital and repayment of advances from unconsolidated joint ventures		0	0	0
Interest collected on advances to unconsolidated joint ventures		0	0
Net Cash Provided by (Used in) Investing Activities		(65,588)	(83,387)	(35,970)
Borrowings from credit facility		150,000	88,000	223,050
Repayments of credit facility		(82,500)	(206,000)	(179,974)
Proceeds from senior notes			324,465
Borrowings from other notes payable				0
Repayments of other notes payable			0	0
Payment of debt issuance costs			(7,565)	(1,064)
Cash distributions to non-controlling interest in subsidiary				0
Contributions to subsidiaries from corporate		0	0	0
Distributions to Corporate from Subsidiaries		0	0	0
Repurchase of common stock		(8,563)
Tax withholding paid on behalf of employees for stock awards		(982)	(590)	(648)
Excess income tax benefit from stock-based compensation				(97)
Proceeds from exercise of stock options			102
Net Cash Provided by (Used in) Financing Activities		57,955	198,412	41,267
Net (decrease) increase in cash, cash equivalents and restricted cash		(70,709)	83,201	(1,744)
Cash, cash equivalents and restricted cash – end of period		28,877	99,586	16,385	18,129
Consolidation, Eliminations [Member]
Net Cash Provided by (Used in) Operating Activities		(4,779)	(17,058)	(26,894)
Purchases of property and equipment		0	0	0
Cash assumed from joint venture at consolidation			0	0
Contributions and advances to unconsolidated joint ventures		0	0	0
Contributions to Subsidiaries from Corporate		249,435	275,794	225,169
Distributions of Equity from Subsidiaries		(183,896)	(192,478)	(190,117)
Distributions of capital and repayment of advances from unconsolidated joint ventures		0	0	0
Interest collected on advances to unconsolidated joint ventures		0	0
Net Cash Provided by (Used in) Investing Activities		65,539	83,316	35,052
Borrowings from credit facility		0	0	0
Repayments of credit facility		0	0	0
Proceeds from senior notes			0
Borrowings from other notes payable				0
Repayments of other notes payable			0	0
Payment of debt issuance costs			0	0
Cash distributions to non-controlling interest in subsidiary				0
Contributions to subsidiaries from corporate		(249,435)	(275,794)	(225,169)
Distributions to Corporate from Subsidiaries		188,675	209,536	217,011
Repurchase of common stock		0
Tax withholding paid on behalf of employees for stock awards		0	0	0
Excess income tax benefit from stock-based compensation				0
Proceeds from exercise of stock options			0
Net Cash Provided by (Used in) Financing Activities		(60,760)	(66,258)	(8,158)
Net (decrease) increase in cash, cash equivalents and restricted cash		0	0	0
Cash, cash equivalents and restricted cash – end of period		$ 0	$ 0	$ 0	$ 0