Debt And Financing (Details)				12 Months Ended
	Aug. 05, 2014 USD ($)	Feb. 13, 2014 USD ($)	Jan. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($) shares	Dec. 31, 2011 USD ($)	Jul. 22, 2011 USD ($)	Feb. 11, 2010 USD ($)
Debt Instrument [Line Items]
Contribution rate of subsidiaries to funds				25.00%
Proceeds from Issuance or Sale of Equity			$ 250,000,000	$ 0	$ 250,000,000	$ 0
Repayment of long-term debt				16,700,000	892,700,000	9,200,000
Proceeds from Issuance of Long-term Debt				0	696,800,000	300,000
Cash and Cash Equivalents, at Carrying Value				173,800,000	171,100,000	176,300,000	$ 208,700,000
Long-term Debt, Maturities, Repayments of Principal after Year Five				235,700,000
Premium/(Discount), Debt				(4,300,000)	(6,300,000)
Long-term debt				1,077,600,000	1,109,900,000
Current maturities				(15,900,000)	(31,100,000)
Debt Instrument, Face Amount, Excluding Current Maturities				1,066,000,000	1,084,500,000
Debt Instrument, Unamortized Discount (Premium), Net, Noncurrent Maturities				4,300,000	5,700,000
Accelerated amortization of the discount				2,100,000	27,500,000	7,700,000
Long-term debt, less current portion				(1,061,700,000)	(1,078,800,000)
Gains (Losses) on Extinguishment of Debt				(600,000)	11,200,000	0
Extinguishment of Debt, Acceleration of Net Premiums on Old Debt					16,300,000
Expense Related to Fair Value of Incremental Shares Converted				600,000	5,100,000
Aggregate principal amount				1,081,900,000	1,116,200,000
Payments of Financing Costs					43,800,000
Capitalized Financing Costs					26,700,000
Payments of Stock Issuance Costs				$ 0	$ 17,100,000	0
Common stock, shares authorized | shares				95,000,000	95,000,000
Previous maximum ownership percentage				19.99%	19.99%
Amortization of Beneficial Conversion Feature on Preferred Stock				$ 0	$ 18,100,000	$ 0
Managed Accessibility				209,300,000	198,200,000
10 percent of Borrowing Base				44,200,000
10 percent of line cap				45,000,000
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				1,077,600,000	1,109,900,000
Fair Value
Debt Instrument [Line Items]
Fair value of long term debt				979,600,000	$ 1,104,400,000
Secured CDA [Domain]
Debt Instrument [Line Items]
Long-term debt		$ 51,000,000
ABL Facility
Debt Instrument [Line Items]
Uncommitted Accordion				100,000,000
ABL Facility | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Covenant, Events of Default, Final Unpaid Judgment Against Term Guarantors				30,000,000
ABL Facility | 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				$ 67,500,000.0
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
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
Debt Instrument [Line Items]
Interest rate				8.25%	8.25%
Premium/(Discount), Debt				$ (4,300,000)	$ (5,700,000)
Long-term debt				681,700,000	687,300,000
Debt Instrument, Gross, Current Maturities				7,000,000	7,000,000
Current maturities				(7,000,000)	(7,000,000)
Premium/(Discount), Current Maturities				$ 0	$ 0
Effective Interest Rate				8.45%	8.45%
Aggregate principal amount				$ 686,000,000	$ 693,000,000
2014 Term Loan | Book Value
Debt Instrument [Line Items]
Fair value of long term debt				681,700,000	687,300,000
2014 Term Loan | Fair Value
Debt Instrument [Line Items]
Fair value of long term debt				594,600,000	685,400,000
2014 Term Loan | 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] | Book Value
Debt Instrument [Line Items]
Fair value of long term debt				0	0
Line of Credit [Member] | Fair Value
Debt Instrument [Line Items]
Fair value of long term debt				0	0
Line of Credit [Member] | ABL Facility
Debt Instrument [Line Items]
Principal amount issued				$ 175,000,000
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%
Debt Instrument, Consolidated Fixed Coverage Ratio				1.10
Number of Consecutive Calendar Days 10 Percent of Collateral Cap is Maintained Available				30 days
Borrowing Base				$ 441,700,000	445,500,000
Premium/(Discount), Debt				0	0
Long-term debt				0	0
Line Of Credit Facility, Total Cash and Availability				79,700,000	71,200,000
Line Of Credit Facility, Total Able to Be Drawn				35,500,000	27,100,000
Aggregate principal amount				$ 0	0
Line of Credit [Member] | ABL Facility | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Covenant, Percent Of Collateral Line Cap				15.00%
Line of Credit [Member] | ABL facility - Term B [Member]
Debt Instrument [Line Items]
Principal amount issued				$ 225,000,000
ABL Facility
Debt Instrument [Line Items]
Basis spread on variable rate				2.50%
Letter of Credit, Fees as Percentage of Stated Amount				0.125%
ABL Facility | 2014 Financing [Member]
Debt Instrument [Line Items]
Principal amount issued		$ 450,000,000
Senior Notes | Book Value
Debt Instrument [Line Items]
Fair value of long term debt				$ 0	17,100,000
Senior Notes | Fair Value
Debt Instrument [Line Items]
Fair value of long term debt				0	17,700,000
Senior Notes | Senior B Notes [Domain]
Debt Instrument [Line Items]
Principal amount issued				$ 100,000,000.0
Interest rate				10.00%
Series B Notes Outstanding Principal and Interest				17,900,000
Debt Instrument, Convertible, Conversion Price | $ / shares				$ 18.00
Exchange/conversion of Series B Notes to common stock				$ 1,200,000
Issuance of equity upon conversion of 6% convertible senior notes | shares				75,900
Debt interest expense				$ 400,000
Make whole premium				200,000
Accelerated amortization of the discount				$ 200,000
Cash Repayment to Series B Notes holders				300,000
Senior Notes | Senior A Notes [Member]
Debt Instrument [Line Items]
Principal amount issued								$ 140,000,000.0
Interest rate				10.00%
Senior Notes | Senior B Notes
Debt Instrument [Line Items]
Conversion price, future period | $ / shares			$ 15.00
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
Make Whole Interest Expense					$ 8,000,000
Senior Notes | 6% Senior Convertible Notes
Debt Instrument [Line Items]
Principal amount issued									$ 70,000,000
Interest rate				6.00%
Senior Notes | 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 | Series B Notes
Debt Instrument [Line Items]
Interest rate					10.00%
Premium/(Discount), Debt					$ (600,000)
Long-term debt					17,100,000
Debt Instrument, Gross, Current Maturities					17,700,000
Current maturities					(17,100,000)
Premium/(Discount), Current Maturities					$ (600,000)
Effective Interest Rate					25.60%
Aggregate principal amount					$ 17,700,000
Lease Financing Obligation
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal after Year Five				$ 235,700,000
Aggregate principal amount				278,000,000
Long Term Debt, Principal Cash Obligation, After Year Five				11,600,000
Net Book Value Of Assets				$ 224,100,000
Secured Second A&R CDA [Member]
Debt Instrument [Line Items]
Stated interest rate, minimum				3.30%	3.30%
Stated interest rate, floor				18.30%	18.30%
Premium/(Discount), Debt				$ 0	$ 0
Long-term debt				$ 44,700,000	$ 47,000,000
Effective Interest Rate				7.30%	7.30%
Aggregate principal amount				$ 44,700,000	$ 47,000,000
Letter of Credit [Member] | ABL Facility
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount				362,000,000	$ 374,300,000
Letter of Credit [Member] | Amended And Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Capacity				$ 437,000,000
Lease financing obligations
Debt Instrument [Line Items]
Stated interest rate, minimum				10.00%	10.00%
Stated interest rate, floor				18.20%	18.20%
Premium/(Discount), Debt				$ 0	$ 0
Long-term debt				278,000,000	285,100,000
Debt Instrument, Gross, Current Maturities				8,900,000	6,800,000
Current maturities				(8,900,000)	(6,800,000)
Premium/(Discount), Current Maturities				$ 0	$ 0
Effective Interest Rate				12.00%	12.00%
Aggregate principal amount				$ 278,000,000	$ 285,100,000
Lease financing obligations | Book Value
Debt Instrument [Line Items]
Fair value of long term debt				278,000,000	285,100,000
Lease financing obligations | Fair Value
Debt Instrument [Line Items]
Fair value of long term debt				282,900,000	282,200,000
Other
Debt Instrument [Line Items]
Premium/(Discount), Debt					0
Long-term debt					200,000
Debt Instrument, Gross, Current Maturities					200,000
Current maturities					(200,000)
Premium/(Discount), Current Maturities					0
Aggregate principal amount					200,000
Other | Book Value
Debt Instrument [Line Items]
Fair value of long term debt				117,900,000	120,400,000
Other | Fair Value
Debt Instrument [Line Items]
Fair value of long term debt				$ 102,100,000	$ 119,100,000
Unsecured Second A&R CD [Member]
Debt Instrument [Line Items]
Stated interest rate, minimum				3.30%	3.30%
Stated interest rate, floor				18.30%	18.30%
Premium/(Discount), Debt				$ 0	$ 0
Long-term debt				$ 73,200,000	$ 73,200,000
Effective Interest Rate				7.30%	7.30%
Aggregate principal amount				$ 73,200,000	$ 73,200,000
Restructured Term Loan [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal after Year Five				0
Aggregate principal amount				686,000,000
Restructured Term Loan [Member] | Amended And Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Principal amount issued				$ 307,400,000
2014 Financing [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Common Stock		215,000,000
Increase (Decrease) in Restricted Cash		90,000,000
Uses of Funds		1,040,000,000
Non Cash Sources of Funds		174,800,000
Non Cash Uses of Funds		174,800,000
2014 Financing [Member] | 6% Notes [Member]
Debt Instrument [Line Items]
Repayment of long-term debt		71,500,000
2014 Financing [Member] | ABL Facility
Debt Instrument [Line Items]
Increase (Decrease) in Restricted Cash		92,000,000
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
Future Repayments of Series A Notes	$ 89,600,000		$ 89,600,000
2014 Financing [Member] | 2014 ABL Facility Credit Agreement [Member] [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Long-term Debt		0
Cash, Period Increase (Decrease)		16,500,000
2014 Financing [Member] | Restructured Term Loan [Member]
Debt Instrument [Line Items]
Repayment of long-term debt		299,700,000
2014 Financing [Member] | 2014 Term Loan
Debt Instrument [Line Items]
Proceeds from Issuance of Long-term Debt		$ 700,000,000
Period Through March 31, 2014 [Member] | ABL Facility
Debt Instrument [Line Items]
Commitment fee percentage				0.25%
Period After March 31. 2014 [Member] | ABL Facility
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] | ABL Facility
Debt Instrument [Line Items]
Basis spread on variable rate				1.00%
LIBOR | 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%
LIBOR | ABL Facility
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] | ABL Facility
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
Common Stock [Member]
Debt Instrument [Line Items]
Stock Issued During Period, Shares, New Issues | shares			14,333,334	0	14,333,000	0
Issuance of equity upon conversion of 6% convertible senior notes | shares				995,000	3,471,000	1,929,000
Preferred Stock [Member]
Debt Instrument [Line Items]
Stock Issued During Period, Shares, New Issues | shares			583,334
Issuance of equity upon conversion of 6% convertible senior notes | shares				0	0	0
Credit Agreement Amendment, September 2014 [Member]
Debt Instrument [Line Items]
Debt Instrument, Total Leverage Ratio				3.25