Supplemental Guarantor Information (Supplemental Condensed Consolidated Statement Of Cash Flows) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	$ (61,400)	$ (146,903)
Net cash used in investing activities	(5,000)	(2,687)
Financing activities
Borrowings under revolving credit facilities	145,000	135,000
Payments on revolving credit facilities	(90,000)	(55,000)
Proceeds from issuance of senior notes		58,956
Proceeds from issuances of insurance premium notes	11,612	448
Principal payments on notes payable	(7,582)	(6,815)
Debt issuance costs	(1,156)	(2,817)
Repurchases of common stock under our stock repurchase program	(2,393)
Repurchases of common stock upon vesting of restricted stock awards	(1,014)	(859)
Net cash provided by financing activities	54,467	128,913
Net increase (decrease) in cash and cash equivalents	(11,933)	(20,677)
Cash and cash equivalents, Beginning of period	29,287	33,462
Cash and cash equivalents, End of period	17,354	12,785
CCS [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(17,969)	(5,168)
Net cash used in investing activities	(42,791)	(148,667)
Financing activities
Borrowings under revolving credit facilities	145,000	135,000
Payments on revolving credit facilities	(90,000)	(55,000)
Proceeds from issuance of senior notes		58,956
Debt issuance costs	(1,156)	(2,817)
Repurchases of common stock under our stock repurchase program	(2,393)
Repurchases of common stock upon vesting of restricted stock awards	(1,014)	(859)
Net cash provided by financing activities	50,437	135,280
Net increase (decrease) in cash and cash equivalents	(10,323)	(18,555)
Cash and cash equivalents, Beginning of period	22,002	22,710
Cash and cash equivalents, End of period	11,679	4,155
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(43,431)	(141,735)
Net cash used in investing activities	(4,685)	(2,398)
Financing activities
Proceeds from issuances of insurance premium notes	11,612	448
Principal payments on notes payable	(7,582)	(6,815)
Payments from (and advances to) parent/subsidiary	42,476	148,378
Net cash provided by financing activities	46,506	142,011
Net increase (decrease) in cash and cash equivalents	(1,610)	(2,122)
Cash and cash equivalents, Beginning of period	7,285	10,752
Cash and cash equivalents, End of period	5,675	8,630
Elimination Entries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash used in investing activities	42,476	148,378
Financing activities
Payments from (and advances to) parent/subsidiary	(42,476)	(148,378)
Net cash provided by financing activities	$ (42,476)	$ (148,378)