Supplemental Guarantor Information (Supplemental Condensed Consolidated Statement Of Cash Flows) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	$ (130,755)	$ (61,400)
Net cash used in investing activities	(66,122)	(5,000)
Financing activities
Borrowings under revolving credit facilities	75,000	145,000
Payments on revolving credit facilities	(270,000)	(90,000)
Proceeds from issuance senior notes	523,000
Repayment of debt assumed in business combination	(151,919)
Proceeds from issuances of insurance notes payable		11,612
Principal payments on notes payable	(4,735)	(7,582)
Debt issuance costs	(3,731)	(1,156)
Repurchases of common stock under our stock repurchase program		(2,393)
Repurchases of common stock upon vesting of restricted stock awards	(4,141)	(1,014)
Net proceeds from mortgage credit facility	27,465
Net proceeds from issuances of common stock	35,010
Net cash provided by financing activities	225,949	54,467
Net decrease in cash and cash equivalents	29,072	(11,933)
Cash and cash equivalents, Beginning of period	29,450	29,287
Cash and cash equivalents, End of period	58,522	17,354
Elimination Entries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash used in investing activities	432,867	42,476
Financing activities
Payments from (and advances to) parent/subsidiary	(432,867)	(42,476)
Net cash provided by financing activities	(432,867)	(42,476)
CCS [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(8,164)	(17,969)
Net cash used in investing activities	(434,617)	(42,791)
Financing activities
Borrowings under revolving credit facilities	75,000	145,000
Payments on revolving credit facilities	(270,000)	(90,000)
Proceeds from issuance senior notes	523,000
Debt issuance costs	(3,731)	(1,156)
Repurchases of common stock under our stock repurchase program		(2,393)
Repurchases of common stock upon vesting of restricted stock awards	(4,141)	(1,014)
Payments from (and advances to) parent/subsidiary	108,887
Net proceeds from issuances of common stock	35,010
Net cash provided by financing activities	464,025	50,437
Net decrease in cash and cash equivalents	21,244	(10,323)
Cash and cash equivalents, Beginning of period	14,637	22,002
Cash and cash equivalents, End of period	35,881	11,679
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(92,577)	(43,431)
Net cash used in investing activities	(63,905)	(4,685)
Financing activities
Repayment of debt assumed in business combination	(151,919)
Proceeds from issuances of insurance notes payable		11,612
Principal payments on notes payable	(4,735)	(7,582)
Payments from (and advances to) parent/subsidiary	320,768	42,476
Net cash provided by financing activities	164,114	46,506
Net decrease in cash and cash equivalents	7,632	(1,610)
Cash and cash equivalents, Beginning of period	8,646	7,285
Cash and cash equivalents, End of period	16,278	$ 5,675
Non Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(30,014)
Net cash used in investing activities	(467)
Financing activities
Payments from (and advances to) parent/subsidiary	3,212
Net proceeds from mortgage credit facility	27,465
Net cash provided by financing activities	30,677
Net decrease in cash and cash equivalents	196
Cash and cash equivalents, Beginning of period	6,167
Cash and cash equivalents, End of period	$ 6,363