Debt And Financing (Details) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 13, 2014	Aug. 05, 2014	Jan. 31, 2014	Jul. 22, 2011	Feb. 11, 2010
Debt Instrument [Line Items]
Contribution rate of subsidiaries to funds	25.00%
Aggregate principal amount	$ 1,116,200,000	$ 1,361,300,000
Paid-in-kind interest on Series A Notes and Series B Notes	14,300,000	29,900,000	29,200,000
Long-term Debt, Maturities, Repayments of Principal after Year Five	243,100,000
Repayment of long-term debt	892,700,000	9,200,000	25,600,000
Premium/(Discount), Debt	(6,300,000)	2,100,000
Long-term debt	1,109,900,000	1,363,400,000
Current maturities	31,100,000	8,600,000
Par value, excluding current maturities	1,084,500,000	1,352,700,000
Debt Instrument, Unamortized Discount (Premium), Net, Noncurrent Maturities	5,700,000	(2,100,000)
Accelerated amortization of the discount	27,500,000	7,700,000	(1,600,000)
Fair value of long term debt	1,104,400,000	1,318,400,000
Long-term debt, less current portion	(1,078,800,000)	(1,354,800,000)
Maximum [Member]
Debt Instrument [Line Items]
Right to increase New Term Loan	250,000,000
Book Value
Debt Instrument [Line Items]
Fair value of long term debt	1,109,900,000	1,363,400,000
2014 ABL Facility Credit Agreement [Member]
Debt Instrument [Line Items]
Uncommitted Accordion	100,000,000
2014 ABL Facility Credit Agreement [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Covenant, Events of Default, Final Unpaid Judgment Against Term Guarantors	30,000,000
2014 ABL Facility Credit Agreement [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Covenant, Events of Default, Cross Default	30,000,000
Debt Instrument, Covenant, liquidity	100,000,000
Debt Instrument, Covenant, availability	67,500,000
Debt Instrument, Consolidated Fixed Coverage Ratio	1.10
2014 Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Total Leverage Ratio				3.25
Prepayment percent of excess cash flow	75.00%
Debt Instrument, Covenant, Mandatory Prepayment Terms, Percentage of Excess Cash Flow, Ratio Range Between 4.00 and 3.50 to 1.00	50.00%
Debt Instrument, Covenant, Mandatory Prepayment Terms, Percentage of Excess Cash Flow When Ratio is Less or Equal 3.00 to 1.00	0.00%
Debt Instrument, Covenant, Mandatory Prepayment Terms, Percentage of Excess Cash Flow, Ratio Range Between 3.00 and 3.50 to 1.00	25.00%
Debt Instrument, Covenant, Mandatory Prepayment Terms, Percentage of Net Cash Proceeds from All Sales	100.00%
Prepayment percent of cash proceeds from debt issuance	100.00%
2014 Term Loan [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Covenant, Events of Default, Final Unpaid Judgment Against Term Guarantors	30,000,000
2014 Term Loan [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Covenant, Events of Default, Cross Default	30,000,000
Senior B Notes [Domain]
Debt Instrument [Line Items]
Paid-in-kind interest on Series A Notes and Series B Notes	400,000
ABL Facility
Debt Instrument [Line Items]
Escrow deposit	90,000,000
Secured Second A&R CDA
Debt Instrument [Line Items]
Long-term debt				51,000,000
A&R CDA
Debt Instrument [Line Items]
Long-term debt	124,200,000
Amended and Restated Contribution Deferral Agreement [Member]
Debt Instrument [Line Items]
Stated interest rate, minimum		3.25%
Stated interest rate, floor		18.25%
2014 Term Loan [Domain]
Debt Instrument [Line Items]
Interest rate	8.25%
Aggregate principal amount	693,000,000
Premium/(Discount), Debt	(5,700,000)
Long-term debt	687,300,000
Debt Instrument, Gross, Current Maturities	7,000,000
Current maturities	7,000,000
Premium/(Discount), Current Maturities	0
Effective Interest Rate	8.45%
Fair value of long term debt	685,400,000	0
2014 Term Loan [Domain] | Book Value
Debt Instrument [Line Items]
Fair value of long term debt	687,300,000	0
2014 Term Loan [Domain] | 2014 Financing [Member]
Debt Instrument [Line Items]
Principal amount issued	700,000,000
2014 Term Loan [Member] | 2014 Financing [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount Discount Percent				1.00%
Debt Instrument, Quarterly Installments as Percent of Principal Amount				1.00%
Line of Credit [Member]
Debt Instrument [Line Items]
Fair value of long term debt	0	326,100,000
Line of Credit [Member] | Book Value
Debt Instrument [Line Items]
Fair value of long term debt	0	318,900,000
Line of Credit [Member] | 2014 ABL Facility Credit Agreement [Member]
Debt Instrument [Line Items]
Borrowing base percent of net eligible receivables	85.00%
Borrowing Base, Percent Of Borrowing Base Cash	100.00%
Borrowing Base, Percent Of Deferred Revenue Liability	85.00%
Debt Instrument, Covenant, Percent Of Collateral Line Cap	10.00%
Interest rate	2.50%
Number of Consecutive Calendar Days 10 Percent of Collateral Cap is Maintained Available	30 days
Debt Instrument, Consolidated Fixed Coverage Ratio	1.10
Aggregate principal amount	0
Borrowing Base	445,500,000
Premium/(Discount), Debt	0
Long-term debt	0
Line Of Credit Facility, Total Cash and Availability	71,200,000
Line Of Credit Facility, Total Able to Be Drawn	27,100,000
Line of Credit [Member] | 2014 ABL Facility Credit Agreement [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Covenant, Percent Of Collateral Line Cap	15.00%
Line of Credit [Member] | ABL facility - Term A [Member]
Debt Instrument [Line Items]
Principal amount issued	175,000,000
Borrowing base percent of net eligible receivables	85.00%
Interest rate		8.50%
Commitment fee percentage	7.50%
Aggregate principal amount		105,000,000
Capacity		175,000,000
Borrowing base percent of credit facility cash collaterized	100.00%
Borrowing Base		156,500,000.0
Availability		51,500,000.0
Premium/(Discount), Debt		(2,100,000)
Long-term debt		102,900,000
Effective Interest Rate		15.80%
Line of Credit [Member] | ABL facility - Term B [Member]
Debt Instrument [Line Items]
Principal amount issued	225,000,000
Interest rate		11.25%
Aggregate principal amount		219,900,000
Capacity		219,900,000.0
Borrowing Base		219,900,000.0
Availability		0
Premium/(Discount), Debt		(3,900,000)
Long-term debt		216,000,000
Effective Interest Rate		15.00%
2014 ABL Facility Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
Letter of Credit, Fees as Percentage of Stated Amount	0.125%
2014 ABL Facility Credit Agreement [Member] | 2014 Financing [Member]
Debt Instrument [Line Items]
Principal amount issued				450,000,000
Senior Notes [Member]
Debt Instrument [Line Items]
Fair value of long term debt	17,700,000	225,800,000
Senior Notes [Member] | Book Value
Debt Instrument [Line Items]
Fair value of long term debt	17,100,000	218,700,000
Senior Notes [Member] | Senior A Notes [Member]
Debt Instrument [Line Items]
Principal amount issued							140,000,000.0
Interest rate	10.00%	10.00%
Aggregate principal amount		177,800,000
Premium/(Discount), Debt		(17,800,000)
Long-term debt		160,000,000
Effective Interest Rate		18.30%
Senior Notes [Member] | Senior B Notes
Debt Instrument [Line Items]
Interest rate	10.00%	10.00%
Aggregate principal amount	17,700,000.0	69,200,000
Conversion price, future period						$ 15.00
Conversion rate	53.9567
Debt Instrument, Convertible, Conversion Ratio, Future Period	0.0539567
Debt Instrument, Convertible, Conversion Ratio	0.0566695
Exchange/conversion of Series B Notes to common stock				50,600,000
Premium/(Discount), Debt	(600,000)	(10,500,000)
Long-term debt	17,100,000	58,700,000
Effective Interest Rate	25.60%	25.60%
Senior Notes [Member] | Senior B Notes [Domain]
Debt Instrument [Line Items]
Principal amount issued	100,000,000
Interest rate	10.00%
Aggregate principal amount	17,700,000	69,200,000
Conversion price, future period	$ 18.5334
Number of votes	0.0594
Conversion price	$ 17.6462
Number of shares converted per thousand	56.6695
Debt Instrument, Convertible, Number of Equity Instruments	982,000
Exchange/conversion of Series B Notes to common stock	1,200,000
Issuance of equity upon conversion of 6% convertible senior notes	75,900
Debt interest expense	400,000
Make whole premium	200,000
Accelerated amortization of the discount	200,000
Senior Notes [Member] | Six Percent Senior Convertible Notes [Member]
Debt Instrument [Line Items]
Interest rate		6.00%
Aggregate principal amount		69,400,000
Premium/(Discount), Debt		(1,100,000)
Long-term debt		68,300,000
Effective Interest Rate		15.50%
Senior Notes [Member] | Unsecured Second A&R CDA
Debt Instrument [Line Items]
Exchange/conversion of Series B Notes to common stock				50,600,000
Long-term debt				73,200,000
Senior Notes [Member] | Series B Note [Member]
Debt Instrument [Line Items]
Debt Instrument, Gross, Current Maturities	17,700,000
Current maturities	17,100,000
Premium/(Discount), Current Maturities	(600,000)
Senior Notes [Member] | 6% convertible senior notes [Domain]
Debt Instrument [Line Items]
Principal amount issued								70,000,000
Interest rate	6.00%
Common shares available for future issuance, as of February 15, 2013	31,673
Secured Second A&R CDA [Member]
Debt Instrument [Line Items]
Aggregate principal amount	47,000,000
Stated interest rate, minimum	3.30%
Stated interest rate, floor	18.30%
Premium/(Discount), Debt	0
Long-term debt	47,000,000
Effective Interest Rate	7.30%
Letter of Credit [Member] | 2014 ABL Facility Credit Agreement [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	374,300,000
Letter of Credit [Member] | Amended And Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Commitment fee percentage	8.00%
Capacity	437,000,000
Commitment fee percentage of average daily unused capacity	8.00%
Fronting fee percentage	1.00%
Pension Contribution Deferral Obligation [Member]
Debt Instrument [Line Items]
Aggregate principal amount		124,200,000
Premium/(Discount), Debt		(200,000)
Long-term debt		124,000,000
Effective Interest Rate		7.30%
Lease financing obligations [Member]
Debt Instrument [Line Items]
Aggregate principal amount	285,100,000	297,500,000
Stated interest rate, minimum	10.00%	10.00%
Stated interest rate, floor	18.20%	18.20%
Premium/(Discount), Debt	0	0
Long-term debt	285,100,000	297,500,000
Debt Instrument, Gross, Current Maturities	6,800,000	8,400,000
Current maturities	6,800,000	8,400,000
Premium/(Discount), Current Maturities	0	0
Effective Interest Rate	12.00%	11.90%
Fair value of long term debt	282,200,000	297,500,000
Lease financing obligations [Member] | Book Value
Debt Instrument [Line Items]
Fair value of long term debt	285,100,000	297,500,000
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Aggregate principal amount	200,000	200,000
Long-term Debt, Maturities, Repayments of Principal after Year Five	0
Premium/(Discount), Debt	0	0
Long-term debt	200,000	200,000
Debt Instrument, Gross, Current Maturities	200,000	200,000
Current maturities	200,000	200,000
Premium/(Discount), Current Maturities	0	0
Fair value of long term debt	119,100,000	179,800,000
Other Debt Obligations [Member] | Book Value
Debt Instrument [Line Items]
Fair value of long term debt	120,400,000	192,500,000
Unsecured Second A&R CD [Member]
Debt Instrument [Line Items]
Aggregate principal amount	73,200,000
Stated interest rate, minimum	3.30%
Stated interest rate, floor	18.30%
Premium/(Discount), Debt	0
Long-term debt	73,200,000
Effective Interest Rate	7.30%
Restructured Term Loan [Member]
Debt Instrument [Line Items]
Interest rate		10.00%
Aggregate principal amount	693,000,000	298,100,000
Long-term Debt, Maturities, Repayments of Principal after Year Five	0
Premium/(Discount), Debt		37,700,000
Long-term debt		335,800,000
Effective Interest Rate		0.00%
Fair value of long term debt	0	289,200,000
Restructured Term Loan [Member] | Book Value
Debt Instrument [Line Items]
Fair value of long term debt	0	335,800,000
Restructured Term Loan [Member] | Amended And Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Principal amount issued	307,400,000
Interest rate	10.00%
Alternate Base Rate [Member] | Amended And Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Description of variable rate basis	alternate base rate
Alternate Base Rate [Member] | Restructured Term Loan [Member] | Amended And Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	6.00%
Variable rate basis, option one, minimum variable rate basis, spread over LIBOR	1.00%
Higher of London Interbank Offer Rate or 3.50% [Member] | Restructured Term Loan [Member] | Amended And Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	7.00%
LIBOR Rate [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Variable rate basis, option one, minimum variable rate basis, spread over LIBOR	1.00%
LIBOR Rate [Member] | Restructured Term Loan [Member] | Amended And Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Variable rate basis, option two, minimum variable rate basis	3.50%
ABR Rate [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Description of variable rate basis	ABR Rate
Prime Rate [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Description of variable rate basis	prime rate
Federal Funds Rate [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Description of variable rate basis	federal funds rate
Alternative base rate spread over federal funds effective rate	0.50%
Reserve Adjusted LIBOR [Member] | LIBOR Rate [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Variable rate basis, option two, minimum variable rate basis	1.50%
Description of variable rate basis	LIBOR
LIBOR Rate Advances [Member] | LIBOR Rate [Member] | Line of Credit [Member] | ABL facility - Term A [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	7.50%
LIBOR Rate Advances [Member] | LIBOR Rate [Member] | Line of Credit [Member] | ABL facility - Term B [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	10.25%
ABR Rate Advances [Member] | ABR Rate [Member] | Line of Credit [Member] | ABL facility - Term A [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	6.50%
ABR Rate Advances [Member] | ABR Rate [Member] | Line of Credit [Member] | ABL facility - Term B [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	9.25%
2014 Financing [Member] | ABL Facility
Debt Instrument [Line Items]
Repayment of long-term debt				326,000,000
2014 Financing [Member] | Series A Note [Member]
Debt Instrument [Line Items]
Repayment of long-term debt					$ 89,600,000	$ 90,900,000
Period Through March 31, 2014 [Member] | 2014 ABL Facility Credit Agreement [Member]
Debt Instrument [Line Items]
Commitment fee percentage	0.25%
Period After March 31. 2014 [Member] | 2014 ABL Facility Credit Agreement [Member]
Debt Instrument [Line Items]
Commitment fee percentage	0.375%
Average Revolver Usage	50.00%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage, If Average Revolver Usage Greater Than 50 Percent	0.25%
One Month LIBOR [Member] | 2014 Term Loan [Member] | 2014 Financing [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
One Month LIBOR [Member] | 2014 ABL Facility Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
London Interbank Offered Rate (LIBOR) [Member] | 2014 Term Loan [Member] | 2014 Financing [Member]
Debt Instrument [Line Items]
Variable rate basis, option two, minimum variable rate basis	1.00%
Basis spread on variable rate	6.25%
Debt Instrument, Basis Spread on Variable Rate, Reduction When Total Leverage Ratio Is Less Than 3.25	0.25%
London Interbank Offered Rate (LIBOR) [Member] | 2014 ABL Facility Credit Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Total Leverage Ratio	2.50
Debt Instrument, Basis Spread on Variable Rate, Reduction When Total Leverage Ratio is Less Than 2.50 to 1.00	0.25%
Federal Funds Rate [Member] | 2014 Term Loan [Member] | 2014 Financing [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Federal Funds Rate [Member] | 2014 ABL Facility Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Higher of London Interbank Offer Rate or 1.00% [Member] | 2014 Term Loan [Member] | 2014 Financing [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	7.25%
50 Percent Of Excess Cash Flow Prepayment [Member] | 2014 Term Loan [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Total Leverage Ratio	3.50
50 Percent Of Excess Cash Flow Prepayment [Member] | 2014 Term Loan [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Total Leverage Ratio	4.00
25 Percent Of Excess Cash Flow Prepayment [Member] | 2014 Term Loan [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Total Leverage Ratio	3.00
25 Percent Of Excess Cash Flow Prepayment [Member] | 2014 Term Loan [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Total Leverage Ratio	3.50
0 Percent Of Excess Cash Flow Prepayment [Member] | 2014 Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Total Leverage Ratio	3.00