Debt and Financing (Details) (USD $)	9 Months Ended							12 Months Ended																						9 Months Ended						9 Months Ended		0 Months Ended	3 Months Ended	9 Months Ended						9 Months Ended			12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Carrying Amount [Member]	Dec. 31, 2013 Carrying Amount [Member]	Sep. 30, 2014 Fair Value [Member]	Dec. 31, 2013 Fair Value [Member]	Dec. 31, 2013 A&R CDA [Member]	Sep. 30, 2014 2014 Term Loan [Domain] [Domain]	Sep. 30, 2014 2014 Term Loan [Domain] [Domain] Carrying Amount [Member]	Dec. 31, 2013 2014 Term Loan [Domain] [Domain] Carrying Amount [Member]	Sep. 30, 2014 2014 Term Loan [Domain] [Domain] Fair Value [Member]	Dec. 31, 2013 2014 Term Loan [Domain] [Domain] Fair Value [Member]	Dec. 31, 2013 Restructured Term Loan [Member]	Sep. 30, 2014 Restructured Term Loan [Member] Carrying Amount [Member]	Dec. 31, 2013 Restructured Term Loan [Member] Carrying Amount [Member]	Sep. 30, 2014 Restructured Term Loan [Member] Fair Value [Member]	Dec. 31, 2013 Restructured Term Loan [Member] Fair Value [Member]	Sep. 30, 2014 2014 ABL Facility Credit Agreement [Member] Carrying Amount [Member]	Dec. 31, 2013 2014 ABL Facility Credit Agreement [Member] Carrying Amount [Member]	Sep. 30, 2014 2014 ABL Facility Credit Agreement [Member] Fair Value [Member]	Dec. 31, 2013 2014 ABL Facility Credit Agreement [Member] Fair Value [Member]	Sep. 30, 2014 Line of Credit [Member] 2014 ABL Facility Credit Agreement [Member]		Sep. 30, 2014 Line of Credit [Member] ABL facility - Term A [Member]	Dec. 31, 2013 Line of Credit [Member] ABL facility - Term A [Member]	Sep. 30, 2014 Line of Credit [Member] ABL facility - Term B [Member]	Dec. 31, 2013 Line of Credit [Member] ABL facility - Term B [Member]	Sep. 30, 2014 Letter of Credit [Member] 2014 ABL Facility Credit Agreement [Member]	Sep. 30, 2014 Pension Contribution Deferral Obligation [Member]	Dec. 31, 2013 Pension Contribution Deferral Obligation [Member]	Sep. 30, 2014 Senior Notes [Member] Carrying Amount [Member]	Dec. 31, 2013 Senior Notes [Member] Carrying Amount [Member]	Sep. 30, 2014 Senior Notes [Member] Fair Value [Member]	Dec. 31, 2013 Senior Notes [Member] Fair Value [Member]	Sep. 30, 2014 Senior Notes [Member] Senior A Notes [Member]	Dec. 31, 2013 Senior Notes [Member] Senior A Notes [Member]	Feb. 13, 2014 Senior Notes [Member] Senior B Notes	Sep. 30, 2013 Senior Notes [Member] Senior B Notes	Sep. 30, 2014 Senior Notes [Member] Senior B Notes	Sep. 30, 2013 Senior Notes [Member] Senior B Notes	Jan. 31, 2014 Senior Notes [Member] Senior B Notes	Dec. 31, 2013 Senior Notes [Member] Senior B Notes	Sep. 30, 2014 Senior Notes [Member] 6% Senior Convertible Notes [Member]	Dec. 31, 2013 Senior Notes [Member] 6% Senior Convertible Notes [Member]	Sep. 30, 2014 Secured Second A&R CDA [Member]	Sep. 30, 2014 Unsecured Second A&R CD [Member]	Sep. 30, 2014 Lease Financing Obligations [Member]	Dec. 31, 2013 Lease Financing Obligations [Member]	Sep. 30, 2014 Lease Financing Obligations [Member] Carrying Amount [Member]	Dec. 31, 2013 Lease Financing Obligations [Member] Carrying Amount [Member]	Sep. 30, 2014 Lease Financing Obligations [Member] Fair Value [Member]	Dec. 31, 2013 Lease Financing Obligations [Member] Fair Value [Member]	Sep. 30, 2014 Other Debt Obligations [Member]	Dec. 31, 2013 Other Debt Obligations [Member]	Sep. 30, 2014 Other Debt Obligations [Member] Carrying Amount [Member]	Dec. 31, 2013 Other Debt Obligations [Member] Carrying Amount [Member]	Sep. 30, 2014 Other Debt Obligations [Member] Fair Value [Member]	Dec. 31, 2013 Other Debt Obligations [Member] Fair Value [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 1,116,800,000		$ 1,361,300,000						$ 694,800,000					$ 298,100,000									$ 0	[1]		$ 105,000,000		$ 219,900,000			$ 124,200,000						$ 177,800,000			$ 17,300,000.0			$ 69,200,000		$ 69,400,000	$ 47,800,000	$ 73,200,000	$ 283,500,000	$ 297,500,000					$ 200,000	$ 200,000
Premium/(Discount), Debt	(7,300,000)		2,100,000						(6,100,000)					37,700,000									0	[1]		(2,100,000)		(3,900,000)			(200,000)						(17,800,000)			(1,200,000)			(10,500,000)		(1,100,000)	0	0	0	0					0	0
Book Value	1,109,500,000		1,363,400,000						688,700,000					335,800,000									0	[1]		102,900,000		216,000,000			124,000,000						160,000,000			16,100,000			58,700,000		68,300,000	47,800,000	73,200,000	283,500,000	297,500,000					200,000	200,000
Debt Instrument, Gross, Current Maturities									(7,000,000)																															(17,300,000)								(6,500,000)	(8,400,000)					(200,000)	(200,000)
Premium/(Discount), Current Maturities									0																															1,200,000								0	0					0	0
Book Value, Current Maturities	(29,800,000)		(8,600,000)						(7,000,000)																															(16,100,000)								(6,500,000)	(8,400,000)					(200,000)	(200,000)
Par Value, Excluding Current Maturities	1,085,800,000		1,352,700,000
Debt Instrument, Unamortized Discount (Premium), Net, Noncurrent Maturities	6,100,000		(2,100,000)
Book Value, Excluding Current Maturities	1,079,700,000		1,354,800,000
Stated Interest Rate									8.25%					10.00%									2.50%	[1]		8.50%		11.25%									10.00%			10.00%			10.00%	6.00%	6.00%
Average Effective Interest Rate									8.45%					0.00%												15.80%		15.00%			7.30%						18.30%			25.60%			25.60%		15.50%	7.30%	7.30%	11.90%	11.90%
Debt conversion price, future period																																								$ 18.5334		$ 15.00
Number of shares converted per thousand, future period																																								53.9567
Conversion price, debt																																								$ 17.5599
Number of shares converted per thousand																																								56.9476
Conversion of stock, shares converted																																								75,900	1,900,000
Interest Expense, Debt																																							6,200,000	400,000	15,200,000
Make Whole Premium																																							2,700,000	200,000	6,600,000
Amortization of premiums and discounts on debt	26,500,000	7,500,000																																					3,500,000	200,000	8,600,000
Number of shares of common stock upon debt conversion																																								982,000
Number of equity instruments convertible, subsequent month																																				0				0
Conversion ratio (future period)																																								0.0539567
Debt Instrument, Convertible, Conversion Ratio																																								0.0569476
Debt Conversion, Converted Instrument, Amount																																						50,600,000		1,200,000	29,100,000
Stated Interest Rate, Minimum								3.25%																																						3.30%	3.30%	10.00%	10.00%
Stated Interest Rate, Maximum								18.30%																																						18.30%	18.30%	18.20%	18.20%
Borrowing Base																							448,400,000		0	156,500,000		219,900,000
Line Of Credit Facility, Total Cash and Availability																							75,500,000
line of credit facility, Total Availability																										51,500,000		0
Letters of Credit Outstanding, Amount																													372,900,000
Line Of Credit Facility, Total Able to Be Drawn																							31,500,000
Capacity																									0	175,000,000		219,900,000
Long-term Debt, Fair Value				$ 1,109,500,000	$ 1,363,400,000	$ 1,135,500,000	$ 1,318,400,000			$ 688,700,000	$ 0	$ 701,700,000	$ 0		$ 0	$ 335,800,000	$ 0	$ 289,200,000	$ 0	$ 318,900,000	$ 0	$ 326,100,000										$ 16,100,000	$ 218,700,000	$ 20,800,000	$ 225,800,000															$ 283,500,000	$ 297,500,000	$ 290,600,000	$ 297,500,000			$ 121,200,000	$ 192,500,000	$ 122,400,000	$ 179,800,000

[1] As of September 30, 2014, the borrowing base and availability on our New ABL Facility were $448.4 million and $75.5 million, respectively. The availability is calculated in accordance with the terms of the New ABL Facility and is derived by reducing the borrowing base by our $372.9 million of outstanding letters of credit as of September 30, 2014. The amount which is actually able to be drawn is limited by certain financial covenants in the New ABL Facility to $31.5 million.