Supplemental Guarantor Information (Supplemental Condensed Consolidated Statement Of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	$ (195,578)	$ (111,272)	$ (44,691)
Net cash used in investing activities	(43,536)	(134,446)	(23,201)
Financing activities
Borrowings under revolving credit facilities	721,000	175,000	220,000
Payments on revolving credit facilities	(518,500)	(370,000)	(160,000)
Net proceeds from mortgage repurchase facilities	56,236	48,320
Proceeds from issuance of senior notes		527,500
Proceeds from insurance notes payable	11,839	2,320	11,612
Extinguishments of debt assumed in business combination	(94,231)	(151,919)
Principal payments on notes payable	(5,371)	(6,998)	(9,217)
Debt issuance costs	(3,642)	(8,579)	(1,156)
Repurchases of common stock upon vesting of restricted stock awards	(5,484)	(5,231)	(1,015)
Repurchases of common stock under our stock repurchase program	(10,952)		(2,393)
Net proceeds from issuances of common stock	30,947	98,063	11,369
Net cash provided by (used in) financing activities	181,842	308,476	69,200
Net increase (decrease)	(57,272)	62,758	1,308
Cash and cash equivalents and Restricted cash, Beginning of period	93,713	30,955	29,647
Cash and cash equivalents and Restricted cash, End of period	36,441	93,713	30,955
Cash and cash equivalents	32,902	88,832	29,450
Restricted Cash	3,539	4,881	1,505
Elimination Entries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash used in investing activities	226,310	440,949	40,439
Financing activities
Payments from (and advances to) parent/subsidiary	(226,310)	(440,949)	(40,439)
Net cash provided by (used in) financing activities	(226,310)	(440,949)	(40,439)
Century [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(74,074)	(27,787)	(16,138)
Net cash used in investing activities	(98,523)	(456,299)	(58,032)
Financing activities
Borrowings under revolving credit facilities	721,000	175,000	220,000
Payments on revolving credit facilities	(518,500)	(370,000)	(160,000)
Proceeds from issuance of senior notes		527,500
Extinguishments of debt assumed in business combination	(94,231)
Principal payments on notes payable	(9)
Debt issuance costs	(3,642)	(8,579)	(1,156)
Repurchases of common stock upon vesting of restricted stock awards	(5,484)	(5,231)	(1,015)
Repurchases of common stock under our stock repurchase program	(10,952)		(2,393)
Payments from (and advances to) parent/subsidiary	(583)	108,930
Net proceeds from issuances of common stock	30,947	98,063	11,369
Net cash provided by (used in) financing activities	118,546	525,683	66,805
Net increase (decrease)	(54,051)	41,597	(7,365)
Cash and cash equivalents and Restricted cash, Beginning of period	56,234	14,637	22,002
Cash and cash equivalents and Restricted cash, End of period	2,183	56,234	14,637
Cash and cash equivalents	2,183	56,234	14,637
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(71,532)	(33,169)	(27,978)
Net cash used in investing activities	(170,862)	(118,583)	(5,585)
Financing activities
Proceeds from insurance notes payable	11,839	2,320	11,612
Extinguishments of debt assumed in business combination		(151,919)
Principal payments on notes payable	(5,362)	(6,998)	(9,217)
Payments from (and advances to) parent/subsidiary	211,879	326,242	33,674
Net cash provided by (used in) financing activities	218,356	169,645	36,069
Net increase (decrease)	(24,038)	17,893	2,506
Cash and cash equivalents and Restricted cash, Beginning of period	28,044	10,151	7,645
Cash and cash equivalents and Restricted cash, End of period	4,006	28,044	10,151
Cash and cash equivalents	2,101	23,399	8,646
Restricted Cash	1,905	4,645	1,505
Non Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(49,972)	(50,316)	(575)
Net cash used in investing activities	(461)	(513)	(23)
Financing activities
Net proceeds from mortgage repurchase facilities	56,236	48,320
Payments from (and advances to) parent/subsidiary	15,014	5,777	6,765
Net cash provided by (used in) financing activities	71,250	54,097	6,765
Net increase (decrease)	20,817	3,268	6,167
Cash and cash equivalents and Restricted cash, Beginning of period	9,435	6,167
Cash and cash equivalents and Restricted cash, End of period	30,252	9,435	6,167
Cash and cash equivalents	28,618	9,199	$ 6,167
Restricted Cash	$ 1,634	$ 236