Supplemental Guarantor Information (Supplemental Condensed Consolidated Statement Of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Condensed Cash Flow Statements, Captions [Line Items]
Net cash used in operating activities	$ (10,462)	$ (37,564)
Net cash used in investing activities	(1,027)	(2,124)
Financing activities
Borrowings under revolving credit facilities	45,000	50,000
Payments on revolving credit facilities	(175,000)	(25,000)
Proceeds from insurance notes payable	127,500
Principal payments on notes payable	(1,582)	(515)
Debt issuance costs	(2,533)
Repurchases of common stock under our stock repurchase program		(2,393)
Repurchases of common stock upon vesting of restricted stock awards	(2,904)	(254)
Net proceeds from issuances of common stock	15,023
Net cash provided by financing activities	5,504	21,838
Net decrease in cash and cash equivalents	(5,985)	(17,850)
Cash and cash equivalents, Beginning of period	29,450	29,287
Cash and cash equivalents, End of period	23,465	11,437
CCS [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash used in operating activities	(2,141)	2,837
Net cash used in investing activities	(6,610)	(39,206)
Financing activities
Borrowings under revolving credit facilities	45,000	50,000
Payments on revolving credit facilities	(175,000)	(25,000)
Proceeds from insurance notes payable	127,500
Debt issuance costs	(2,533)
Repurchases of common stock under our stock repurchase program		(2,393)
Repurchases of common stock upon vesting of restricted stock awards	(2,904)	(254)
Net proceeds from issuances of common stock	15,023
Net cash provided by financing activities	7,086	22,353
Net decrease in cash and cash equivalents	(1,665)	(14,016)
Cash and cash equivalents, Beginning of period	14,637	22,002
Cash and cash equivalents, End of period	12,972	7,986
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash used in operating activities	(7,588)	(40,401)
Net cash used in investing activities	(298)	(1,915)
Financing activities
Principal payments on notes payable	(1,582)	(515)
Payments from (and advances to) parent/subsidiary	5,412	38,997
Net cash provided by financing activities	3,830	38,482
Net decrease in cash and cash equivalents	(4,056)	(3,834)
Cash and cash equivalents, Beginning of period	8,646	7,285
Cash and cash equivalents, End of period	4,590	3,451
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash used in operating activities	(733)
Net cash used in investing activities	(127)
Financing activities
Payments from (and advances to) parent/subsidiary	596
Net cash provided by financing activities	596
Net decrease in cash and cash equivalents	(264)
Cash and cash equivalents, Beginning of period	6,167
Cash and cash equivalents, End of period	5,903
Elimination Entries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash used in investing activities	6,008	38,997
Financing activities
Payments from (and advances to) parent/subsidiary	(6,008)	(38,997)
Net cash provided by financing activities	$ (6,008)	$ (38,997)