Supplemental Guarantor Information Supplemental Condensed Consolidated Statement of Cash Flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Net Cash Provided by (Used in) Operating Activities	$ (71,411)	$ (165,699)
Purchases of property and equipment	(95)	(296)
Cash assumed from joint venture at consolidation	995	2,009
Contributions and advances to unconsolidated joint ventures	(8,517)	(5,656)
Contributions to Subsidiaries from Corporate	0	0
Distributions of Equity from Subsidiaries	0	0
Distributions of capital from unconsolidated joint ventures	2,948	7,405
Net Cash Provided by (Used in) Investing Activities	(4,669)	3,462
Proceeds from senior notes	324,465	0
Cash distribution to noncontrolling interest in subsidiary	0	(725)
Borrowings from credit facility	72,000	175,000
Borrowings from other notes payable	0	343
Repayments of other notes payable	0	(15,636)
Repayments of credit facility	(190,000)	(11,000)
Payments of Debt Issuance Costs	(6,440)	(1,064)
Contributions to subsidiaries from corporate	0	0
Distributions to Corporate from Subsidiaries	0	0
Minimum tax withholding paid on behalf of employees for stock awards	(584)	(647)
Excess income tax provision from stock-based compensation	0	(97)
Proceeds from Stock Options Exercised	102	0
Net Cash Provided by (Used in) Financing Activities	199,543	146,174
Cash and Cash Equivalents, Period Increase (Decrease)	123,463	(16,063)
Cash and cash equivalents	153,959	29,811	$ 30,496	$ 45,874
Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities	(49,302)	(144,949)
Purchases of property and equipment	(55)	(140)
Cash assumed from joint venture at consolidation	995	2,009
Contributions and advances to unconsolidated joint ventures	(8,517)	(5,656)
Contributions to Subsidiaries from Corporate	0	0
Distributions of Equity from Subsidiaries	0	725
Distributions of capital from unconsolidated joint ventures	2,948	7,405
Net Cash Provided by (Used in) Investing Activities	(4,629)	4,343
Proceeds from senior notes	0
Cash distribution to noncontrolling interest in subsidiary		0
Borrowings from credit facility	0	0
Borrowings from other notes payable		0
Repayments of other notes payable		(13,135)
Repayments of credit facility	0	0
Payments of Debt Issuance Costs	0	0
Contributions to subsidiaries from corporate	94,035	160,406
Distributions to Corporate from Subsidiaries	(20,766)	(21,000)
Minimum tax withholding paid on behalf of employees for stock awards	0	0
Excess income tax provision from stock-based compensation		0
Proceeds from Stock Options Exercised	0
Net Cash Provided by (Used in) Financing Activities	73,269	126,271
Cash and Cash Equivalents, Period Increase (Decrease)	19,338	(14,335)
Cash and cash equivalents	33,180	12,805	13,842	27,140
Non-Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities	(47)	3,347
Purchases of property and equipment	0	0
Cash assumed from joint venture at consolidation	0	0
Contributions and advances to unconsolidated joint ventures	0	0
Contributions to Subsidiaries from Corporate	0	0
Distributions of Equity from Subsidiaries	0	0
Distributions of capital from unconsolidated joint ventures	0	0
Net Cash Provided by (Used in) Investing Activities	0	0
Proceeds from senior notes	0
Cash distribution to noncontrolling interest in subsidiary		(725)
Borrowings from credit facility	0	0
Borrowings from other notes payable		343
Repayments of other notes payable		(2,501)
Repayments of credit facility	0	0
Payments of Debt Issuance Costs	0	0
Contributions to subsidiaries from corporate	0	0
Distributions to Corporate from Subsidiaries	0	(725)
Minimum tax withholding paid on behalf of employees for stock awards	0	0
Excess income tax provision from stock-based compensation		0
Proceeds from Stock Options Exercised	0
Net Cash Provided by (Used in) Financing Activities	0	(3,608)
Cash and Cash Equivalents, Period Increase (Decrease)	(47)	(261)
Cash and cash equivalents	222	344	269	605
Parent Company [Member]
Net Cash Provided by (Used in) Operating Activities	(21,176)	(22,026)
Purchases of property and equipment	(40)	(156)
Cash assumed from joint venture at consolidation	0	0
Contributions and advances to unconsolidated joint ventures	0	0
Contributions to Subsidiaries from Corporate	(94,035)	(160,406)
Distributions of Equity from Subsidiaries	19,880	18,929
Distributions of capital from unconsolidated joint ventures	0	0
Net Cash Provided by (Used in) Investing Activities	(74,195)	(141,633)
Proceeds from senior notes	324,465
Cash distribution to noncontrolling interest in subsidiary		0
Borrowings from credit facility	72,000	175,000
Borrowings from other notes payable		0
Repayments of other notes payable		0
Repayments of credit facility	(190,000)	(11,000)
Payments of Debt Issuance Costs	(6,440)	(1,064)
Contributions to subsidiaries from corporate	0	0
Distributions to Corporate from Subsidiaries	0	0
Minimum tax withholding paid on behalf of employees for stock awards	(584)	(647)
Excess income tax provision from stock-based compensation		(97)
Proceeds from Stock Options Exercised	102
Net Cash Provided by (Used in) Financing Activities	199,543	162,192
Cash and Cash Equivalents, Period Increase (Decrease)	104,172	(1,467)
Cash and cash equivalents	120,557	16,662	16,385	18,129
Consolidation, Eliminations [Member]
Net Cash Provided by (Used in) Operating Activities	(886)	(2,071)
Purchases of property and equipment	0	0
Cash assumed from joint venture at consolidation	0	0
Contributions and advances to unconsolidated joint ventures	0	0
Contributions to Subsidiaries from Corporate	94,035	160,406
Distributions of Equity from Subsidiaries	(19,880)	(19,654)
Distributions of capital from unconsolidated joint ventures	0	0
Net Cash Provided by (Used in) Investing Activities	74,155	140,752
Proceeds from senior notes	0
Cash distribution to noncontrolling interest in subsidiary		0
Borrowings from credit facility	0	0
Borrowings from other notes payable		0
Repayments of other notes payable		0
Repayments of credit facility	0	0
Payments of Debt Issuance Costs	0	0
Contributions to subsidiaries from corporate	(94,035)	(160,406)
Distributions to Corporate from Subsidiaries	20,766	21,725
Minimum tax withholding paid on behalf of employees for stock awards	0	0
Excess income tax provision from stock-based compensation		0
Proceeds from Stock Options Exercised	0
Net Cash Provided by (Used in) Financing Activities	(73,269)	(138,681)
Cash and Cash Equivalents, Period Increase (Decrease)	0	0
Cash and cash equivalents	$ 0	$ 0	$ 0	$ 0