Supplemental Guarantor Information (Supplemental Condensed Consolidated Statement Of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	$ (68,807)	$ (195,578)	$ (111,272)
Net cash used in investing activities	(14,283)	(43,536)	(134,446)
Financing activities
Borrowings under revolving credit facilities	1,548,500	721,000	175,000
Payments on revolving credit facilities	(1,682,300)	(518,500)	(370,000)
Proceeds from issuance senior notes	500,000		527,500
Extinguishment of senior notes due 2022	(391,942)
Principal payments on notes payable	(20,237)	(5,371)	(6,998)
Proceeds from insurance notes payable	13,719	11,839	2,320
Extinguishments of debt assumed in business combination		(94,231)	(151,919)
Debt issuance costs	(6,140)	(3,642)	(8,579)
Net proceeds from mortgage repurchase facilities	69,540	56,236	48,320
Net proceeds from issuances of common stock	79,052	30,947	98,063
Repurchases of common stock upon vesting of stock-based compensation	(3,583)	(5,484)	(5,231)
Repurchases of common stock under our stock repurchase program	(1,439)	(10,952)
Net cash provided by (used in) financing activities	105,170	181,842	308,476
Net increase (decrease)	22,080	(57,272)	62,758
Cash and cash equivalents and Restricted cash, Beginning of period	36,441	93,713	30,955
Cash and cash equivalents and Restricted cash, End of period	58,521	36,441	93,713
Cash and cash equivalents	55,436	32,902	88,832
Restricted Cash	3,085	3,539	4,881
Elimination Entries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash used in investing activities	(17,153)	226,310	440,949
Financing activities
Payments from (and advances to) parent/subsidiary	17,153	(226,310)	(440,949)
Net cash provided by (used in) financing activities	17,153	(226,310)	(440,949)
Parent
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(54,572)	(74,074)	(27,787)
Net cash used in investing activities	11,818	(98,523)	(456,299)
Financing activities
Borrowings under revolving credit facilities	1,548,500	721,000	175,000
Payments on revolving credit facilities	(1,682,300)	(518,500)	(370,000)
Proceeds from issuance senior notes	500,000		527,500
Extinguishment of senior notes due 2022	(391,942)
Principal payments on notes payable		(9)
Extinguishments of debt assumed in business combination		(94,231)
Debt issuance costs	(6,140)	(3,642)	(8,579)
Net proceeds from issuances of common stock	79,052	30,947	98,063
Repurchases of common stock upon vesting of stock-based compensation	(3,583)	(5,484)	(5,231)
Repurchases of common stock under our stock repurchase program	(1,439)	(10,952)
Payments from (and advances to) parent/subsidiary		(583)	108,930
Net cash provided by (used in) financing activities	42,148	118,546	525,683
Net increase (decrease)	(606)	(54,051)	41,597
Cash and cash equivalents and Restricted cash, Beginning of period	2,183	56,234	14,637
Cash and cash equivalents and Restricted cash, End of period	1,577	2,183	56,234
Cash and cash equivalents	1,577	2,183	56,234
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	51,793	(71,532)	(33,169)
Net cash used in investing activities	(8,815)	(170,862)	(118,583)
Financing activities
Principal payments on notes payable	(20,237)	(5,362)	(6,998)
Proceeds from insurance notes payable	13,719	11,839	2,320
Extinguishments of debt assumed in business combination			(151,919)
Payments from (and advances to) parent/subsidiary	(40,126)	211,879	326,242
Net cash provided by (used in) financing activities	(46,644)	218,356	169,645
Net increase (decrease)	(3,666)	(24,038)	17,893
Cash and cash equivalents and Restricted cash, Beginning of period	4,006	28,044	10,151
Cash and cash equivalents and Restricted cash, End of period	340	4,006	28,044
Cash and cash equivalents		2,101	23,399
Restricted Cash	340	1,905	4,645
Non Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(66,028)	(49,972)	(50,316)
Net cash used in investing activities	(133)	(461)	(513)
Financing activities
Net proceeds from mortgage repurchase facilities	69,540	56,236	48,320
Payments from (and advances to) parent/subsidiary	22,973	15,014	5,777
Net cash provided by (used in) financing activities	92,513	71,250	54,097
Net increase (decrease)	26,352	20,817	3,268
Cash and cash equivalents and Restricted cash, Beginning of period	30,252	9,435	6,167
Cash and cash equivalents and Restricted cash, End of period	56,604	30,252	9,435
Cash and cash equivalents	53,859	28,618	9,199
Restricted Cash	$ 2,745	$ 1,634	$ 236