Debt and Financing (Details) (USD $)	3 Months Ended			12 Months Ended		0 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014		Feb. 13, 2014	Mar. 25, 2015	Jan. 31, 2014
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 1,093,600,000			1,116,200,000
Premium/(Discount), Debt	(5,400,000)			(6,300,000)
Book Value	1,088,200,000			1,109,900,000
Book Value, Current Maturities	(14,200,000)			(31,100,000)
Par Value, Excluding Current Maturities	1,079,400,000			1,084,500,000
Debt Instrument, Unamortized Discount (Premium), Net, Noncurrent Maturities	5,400,000			5,700,000
Book Value, Excluding Current Maturities	1,074,000,000			1,078,800,000
Series B Notes Outstanding Principal and Interest							17,900,000.0
Series B Notes Conversion Price Per Share							$ 18.00
Common Stock Shares Converted for Series B Notes							994,689
Expense Related to Fair Value of Incremental Shares Converted	600,000		5,100,000
Cash Repayment to Series B Notes holders	300,000.0
Amortization of premiums and discounts on debt	1,000,000		17,700,000
Carrying Amount [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	1,088,200,000			1,109,900,000
Fair Value [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	1,082,200,000			1,104,400,000
A&R CDA [Member]
Debt Instrument [Line Items]
Stated Interest Rate, Minimum				3.25%
Stated Interest Rate, Maximum				18.30%
2014 Term Loan [Domain] [Domain]
Debt Instrument [Line Items]
Long-term Debt, Gross	691,300,000
Premium/(Discount), Debt	(5,400,000)
Book Value	685,900,000
Debt Instrument, Gross, Current Maturities	(7,000,000)
Premium/(Discount), Current Maturities	0
Book Value, Current Maturities	(7,000,000)
Stated Interest Rate	8.25%
Average Effective Interest Rate	8.50%
2014 Term Loan [Domain] [Domain] | Carrying Amount [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	685,900,000			687,300,000
2014 Term Loan [Domain] [Domain] | Fair Value [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	681,600,000			685,400,000
Restructured Term Loan [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross				693,000,000
Premium/(Discount), Debt				(5,700,000)
Book Value				687,300,000
Stated Interest Rate				8.25%
Average Effective Interest Rate				8.50%
Line of Credit [Member] | 2014 ABL Facility Credit Agreement [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	0	[1]
Premium/(Discount), Debt	0	[1]
Book Value	0	[1]
Borrowing Base	450,000,000			445,500,000
Line Of Credit Facility, Total Cash and Availability	84,200,000			71,200,000
Line Of Credit Facility, Total Able to Be Drawn	39,200,000			27,100,000
Line of Credit [Member] | ABL facility - Term A [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross				0	[2]
Premium/(Discount), Debt				0	[2]
Book Value				0	[2]
Borrowing Base	0			156,500,000
line of credit facility, Total Availability				51,500,000
Capacity	0			175,000,000
Line of Credit [Member] | ABL facility - Term B [Member]
Debt Instrument [Line Items]
Debt Instrument, Gross, Current Maturities				(7,000,000)
Premium/(Discount), Current Maturities				0
Book Value, Current Maturities				(7,000,000)
Borrowing Base				219,900,000
line of credit facility, Total Availability				0
Capacity				219,900,000
Letter of Credit [Member] | 2014 ABL Facility Credit Agreement [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	365,800,000			374,300,000
Pension Contribution Deferral Obligation [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross				73,200,000
Premium/(Discount), Debt				0
Book Value				73,200,000
Average Effective Interest Rate				7.30%
Stated Interest Rate, Minimum
Stated Interest Rate, Maximum
Senior Notes [Member] | Carrying Amount [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	0			17,100,000
Senior Notes [Member] | Fair Value [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	0			17,700,000
Senior Notes [Member] | Senior A Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross				17,700,000
Premium/(Discount), Debt				(600,000)
Book Value				17,100,000
Stated Interest Rate				10.00%
Average Effective Interest Rate				25.60%
Number of equity instruments convertible, subsequent month	0
Senior Notes [Member] | Senior B Notes
Debt Instrument [Line Items]
Long-term Debt, Gross				47,000,000
Premium/(Discount), Debt				0
Book Value				47,000,000
Average Effective Interest Rate				7.30%
Debt conversion price, future period	$ 18.5334							$ 15.00
Number of shares converted per thousand, future period	53.9567
Conversion of stock, shares converted	75,900
Interest Expense, Debt			400,000
Make Whole Premium			200,000
Amortization of premiums and discounts on debt			200,000
Number of equity instruments convertible, subsequent month	0
Conversion ratio (future period)	0.0539567
Debt Instrument, Convertible, Conversion Ratio	0.0569476
Debt Conversion, Converted Instrument, Amount			1,200,000			50,600,000
Senior Notes [Member] | Series B Note [Member]
Debt Instrument [Line Items]
Debt Instrument, Gross, Current Maturities				(17,700,000)
Premium/(Discount), Current Maturities				600,000
Book Value, Current Maturities				(17,100,000)
Debt Conversion, Converted Instrument, Amount						50,600,000
Secured Second A&R CDA [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	46,200,000
Premium/(Discount), Debt	0
Book Value	46,200,000
Average Effective Interest Rate	7.30%
Stated Interest Rate, Minimum	3.30%
Stated Interest Rate, Maximum	18.30%
Unsecured Second A&R CD [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	73,200,000
Premium/(Discount), Debt	0
Book Value	73,200,000
Average Effective Interest Rate	7.30%
Stated Interest Rate, Minimum	3.30%
Stated Interest Rate, Maximum	18.30%
Lease Financing Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	282,700,000			285,100,000
Premium/(Discount), Debt	0			0
Book Value	282,700,000			285,100,000
Debt Instrument, Gross, Current Maturities	(7,000,000)			(6,800,000)
Premium/(Discount), Current Maturities	0			0
Book Value, Current Maturities	(7,000,000)			(6,800,000)
Average Effective Interest Rate	12.00%			12.00%
Stated Interest Rate, Minimum	10.00%			10.00%
Stated Interest Rate, Maximum	18.20%			18.20%
Lease Financing Obligations [Member] | Carrying Amount [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	282,700,000			285,100,000
Lease Financing Obligations [Member] | Fair Value [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	282,700,000			282,200,000
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	200,000			200,000
Premium/(Discount), Debt	0			0
Book Value	200,000			200,000
Debt Instrument, Gross, Current Maturities	(200,000)			(200,000)
Premium/(Discount), Current Maturities	0			0
Book Value, Current Maturities	(200,000)			(200,000)
Other Debt Obligations [Member] | Carrying Amount [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	119,600,000			120,400,000
Other Debt Obligations [Member] | Fair Value [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	$ 117,900,000			119,100,000

[1] As of March 31, 2015, the borrowing base and availability on our ABL Facility were $450.0 million and $84.2 million, respectively. The availability is calculated in accordance with the terms of the ABL Facility and is derived by reducing the borrowing base by our $365.8 million of outstanding letters of credit as of March 31, 2015. The amount which is actually able to be drawn is limited by certain financial covenants in the ABL Facility to $39.2 million.

[2] As of December 31, 2014, the borrowing base and availability on our ABL Facility were $445.5 million and $71.2 million, respectively. The availability is calculated in accordance with the terms of the ABL Facility and is derived by reducing the borrowing base by our $374.3 million of outstanding letters of credit as of December 31, 2014. The amount which is actually able to be drawn is limited by certain financial covenants in the ABL Facility to $27.1 million.