Supplemental Guarantor Information Supplemental Condensed Consolidated Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Net Cash Used in Operating Activities	$ (12,232)	$ (29,442)
Purchases of property and equipment	(5)	(72)
Contributions and advances to unconsolidated joint ventures	(1,335)	(4,273)
Contributions to Subsidiaries from Corporate	0	0
Distributions of Capital from Subsidiaries	0	0
Distributions of capital and repayment of advances from unconsolidated joint ventures	2,562	2,264
Interest collected on advances to unconsolidated joint ventures		129
Net cash provided by (used in) investing activities	1,222	(1,952)
Borrowings from credit facility	30,000	0
Repayments of credit facility	(13,500)	0
Repurchase of senior notes	4,512	0
Contributions to subsidiaries from corporate	0	0
Distributions to Corporate from Subsidiaries	0	0
Repurchases of common stock	(1,042)	0
Tax withholding paid on behalf of employees for stock awards	(488)	(954)
Net cash provided by (used in) financing activities	10,458	(954)
Net (decrease) increase in cash, cash equivalents and restricted cash	(552)	(32,348)
Cash, Cash Equivalents, and Restricted Cash	41,990	91,622	$ 42,542	$ 123,970
Guarantor Subsidiaries [Member]
Net Cash Used in Operating Activities	2,035	(14,693)
Purchases of property and equipment	(5)	(66)
Contributions and advances to unconsolidated joint ventures	(1,335)	(4,273)
Contributions to Subsidiaries from Corporate	0	0
Distributions of Capital from Subsidiaries	0	0
Distributions of capital and repayment of advances from unconsolidated joint ventures	2,562	2,264
Interest collected on advances to unconsolidated joint ventures		129
Net cash provided by (used in) investing activities	1,222	(1,946)
Borrowings from credit facility	0
Repayments of credit facility	0
Repurchase of senior notes	0
Contributions to subsidiaries from corporate	46,000	56,185
Distributions to Corporate from Subsidiaries	(39,000)	(21,175)
Repurchases of common stock	0
Tax withholding paid on behalf of employees for stock awards	0	0
Net cash provided by (used in) financing activities	7,000	35,010
Net (decrease) increase in cash, cash equivalents and restricted cash	10,257	18,371
Cash, Cash Equivalents, and Restricted Cash	23,775	42,567	13,518	24,196
Non-Guarantor Subsidiaries [Member]
Net Cash Used in Operating Activities	(8)	(6)
Purchases of property and equipment	0	0
Contributions and advances to unconsolidated joint ventures	0	0
Contributions to Subsidiaries from Corporate	0	0
Distributions of Capital from Subsidiaries	0	0
Distributions of capital and repayment of advances from unconsolidated joint ventures	0	0
Interest collected on advances to unconsolidated joint ventures		0
Net cash provided by (used in) investing activities	0	0
Borrowings from credit facility	0
Repayments of credit facility	0
Repurchase of senior notes	0
Contributions to subsidiaries from corporate	0	0
Distributions to Corporate from Subsidiaries	0	0
Repurchases of common stock	0
Tax withholding paid on behalf of employees for stock awards	0	0
Net cash provided by (used in) financing activities	0	0
Net (decrease) increase in cash, cash equivalents and restricted cash	(8)	(6)
Cash, Cash Equivalents, and Restricted Cash	139	182	147	188
Parent Company [Member]
Net Cash Used in Operating Activities	(14,259)	(14,743)
Purchases of property and equipment	0	(6)
Contributions and advances to unconsolidated joint ventures	0	0
Contributions to Subsidiaries from Corporate	(46,000)	(56,185)
Distributions of Capital from Subsidiaries	39,000	21,175
Distributions of capital and repayment of advances from unconsolidated joint ventures	0	0
Interest collected on advances to unconsolidated joint ventures		0
Net cash provided by (used in) investing activities	(7,000)	(35,016)
Borrowings from credit facility	30,000
Repayments of credit facility	(13,500)
Repurchase of senior notes	(4,512)
Contributions to subsidiaries from corporate	0	0
Distributions to Corporate from Subsidiaries	0	0
Repurchases of common stock	(1,042)
Tax withholding paid on behalf of employees for stock awards	(488)	(954)
Net cash provided by (used in) financing activities	10,458	(954)
Net (decrease) increase in cash, cash equivalents and restricted cash	(10,801)	(50,713)
Cash, Cash Equivalents, and Restricted Cash	18,076	48,873	28,877	99,586
Consolidation, Eliminations [Member]
Net Cash Used in Operating Activities	0	0
Purchases of property and equipment	0	0
Contributions and advances to unconsolidated joint ventures	0	0
Contributions to Subsidiaries from Corporate	46,000	56,185
Distributions of Capital from Subsidiaries	(39,000)	(21,175)
Distributions of capital and repayment of advances from unconsolidated joint ventures	0	0
Interest collected on advances to unconsolidated joint ventures		0
Net cash provided by (used in) investing activities	7,000	35,010
Borrowings from credit facility	0
Repayments of credit facility	0
Repurchase of senior notes	0
Contributions to subsidiaries from corporate	(46,000)	(56,185)
Distributions to Corporate from Subsidiaries	39,000	21,175
Repurchases of common stock	0
Tax withholding paid on behalf of employees for stock awards	0	0
Net cash provided by (used in) financing activities	(7,000)	(35,010)
Net (decrease) increase in cash, cash equivalents and restricted cash	0	0
Cash, Cash Equivalents, and Restricted Cash	$ 0	$ 0	$ 0	$ 0