Supplemental Consolidating Financial Information Condensed Statement of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating cash flow	$ 40,671	$ 91,738
Capital expenditures	(38,836)	(36,165)
Contribution to equity-method investment	0	(13,102)
Net proceeds from sale of long-term assets	5,256	11,751
Investing activity with subsidiaries	0	0
Other, net	(3,736)	3,559
Investing cash flow	(37,316)	(33,957)
Issuances of long-term debt		429,415
Repayments of long-term debt and capital lease obligations	(11,714)	(412,646)
Borrowings under the ABL Revolver	24,000	36,590
Repayments of the ABL Revolver	(24,000)	(36,590)
Repayments of the Credit Facility Revolver	0	(40,000)
Payments for debt modification and issuance costs	(266)	(13,810)
Payments of debt extinguishment costs	(300)	0
Financing activity with subsidiaries	0	0
Financing cash flow	(12,280)	(37,041)
Increase (decrease) in cash and equivalents	(8,925)	20,740
Cash and equivalents, beginning of period	54,017	51,026
Cash and equivalents, end of period	45,092	71,766
Consolidation, Eliminations [Member]
Operating cash flow	0	0
Capital expenditures	0	0
Contribution to equity-method investment		0
Net proceeds from sale of long-term assets	0	0
Investing activity with subsidiaries	6,033	3,786
Other, net	0	0
Investing cash flow	6,033	3,786
Issuances of long-term debt		0
Repayments of long-term debt and capital lease obligations	0	0
Borrowings under the ABL Revolver	0	0
Repayments of the ABL Revolver	0	0
Repayments of the Credit Facility Revolver		0
Payments for debt modification and issuance costs	0	0
Payments of debt extinguishment costs	0
Financing activity with subsidiaries	(6,033)	(3,786)
Financing cash flow	(6,033)	(3,786)
Increase (decrease) in cash and equivalents	0	0
Cash and equivalents, beginning of period	0	0
Cash and equivalents, end of period	0	0
Parent Company [Member] | Reportable Legal Entities [Member]
Operating cash flow	0	(4,420)
Capital expenditures	0	0
Contribution to equity-method investment		0
Net proceeds from sale of long-term assets	0	1,819
Investing activity with subsidiaries	0	0
Other, net	0	0
Investing cash flow	0	1,819
Issuances of long-term debt		0
Repayments of long-term debt and capital lease obligations	0	0
Borrowings under the ABL Revolver	0	0
Repayments of the ABL Revolver	0	0
Repayments of the Credit Facility Revolver		0
Payments for debt modification and issuance costs	0	0
Payments of debt extinguishment costs	0
Financing activity with subsidiaries	0	0
Financing cash flow	0	0
Increase (decrease) in cash and equivalents	0	(2,601)
Cash and equivalents, beginning of period	0	2,601
Cash and equivalents, end of period	0	0
Subsidiary Issuer [Member] | Reportable Legal Entities [Member]
Operating cash flow	14,674	30,523
Capital expenditures	(2,689)	(1,984)
Contribution to equity-method investment		0
Net proceeds from sale of long-term assets	0	0
Investing activity with subsidiaries	(5,463)	0
Other, net	0	0
Investing cash flow	(8,152)	(1,984)
Issuances of long-term debt		429,415
Repayments of long-term debt and capital lease obligations	(11,125)	(412,425)
Borrowings under the ABL Revolver	24,000	36,590
Repayments of the ABL Revolver	(24,000)	(36,590)
Repayments of the Credit Facility Revolver		(40,000)
Payments for debt modification and issuance costs	(266)	(13,810)
Payments of debt extinguishment costs	(300)
Financing activity with subsidiaries	0	3,698
Financing cash flow	(11,691)	(33,122)
Increase (decrease) in cash and equivalents	(5,169)	(4,583)
Cash and equivalents, beginning of period	15,851	12,704
Cash and equivalents, end of period	10,682	8,121
Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Operating cash flow	3,243	11,469
Capital expenditures	(8,748)	(14,751)
Contribution to equity-method investment		0
Net proceeds from sale of long-term assets	1,167	7,222
Investing activity with subsidiaries	(570)	(3,786)
Other, net	0	0
Investing cash flow	(8,151)	(11,315)
Issuances of long-term debt		0
Repayments of long-term debt and capital lease obligations	(555)	(154)
Borrowings under the ABL Revolver	0	0
Repayments of the ABL Revolver	0	0
Repayments of the Credit Facility Revolver		0
Payments for debt modification and issuance costs	0	0
Payments of debt extinguishment costs	0
Financing activity with subsidiaries	5,463	0
Financing cash flow	4,908	(154)
Increase (decrease) in cash and equivalents	0	0
Cash and equivalents, beginning of period	0	0
Cash and equivalents, end of period	0	0
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Operating cash flow	22,754	54,166
Capital expenditures	(27,399)	(19,430)
Contribution to equity-method investment		(13,102)
Net proceeds from sale of long-term assets	4,089	2,710
Investing activity with subsidiaries	0	0
Other, net	(3,736)	3,559
Investing cash flow	(27,046)	(26,263)
Issuances of long-term debt		0
Repayments of long-term debt and capital lease obligations	(34)	(67)
Borrowings under the ABL Revolver	0	0
Repayments of the ABL Revolver	0	0
Repayments of the Credit Facility Revolver		0
Payments for debt modification and issuance costs	0	0
Payments of debt extinguishment costs	0
Financing activity with subsidiaries	570	88
Financing cash flow	536	21
Increase (decrease) in cash and equivalents	(3,756)	27,924
Cash and equivalents, beginning of period	38,166	35,721
Cash and equivalents, end of period	$ 34,410	$ 63,645