Liquidity (Risks and Uncertainties) (Details) (USD $)	9 Months Ended			9 Months Ended		0 Months Ended		12 Months Ended	9 Months Ended	0 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member]	Sep. 30, 2013 Multiemployer Plans, Pension [Member]	Nov. 12, 2013 Credit Agreement Amendment [Member]	Nov. 12, 2013 ABL Facility Credit Agreement [Member]	Sep. 30, 2013 ABL Facility Credit Agreement [Member]	Sep. 30, 2013 Revenue Equipment	Nov. 12, 2013 Minimum [Member] Credit Agreement Amendment [Member]	Nov. 12, 2013 Subsequent Event [Member]
Risks and Uncertainties [Line Items]
Minimum cash balance required, period November 12, 2013 to December 31, 2013 if EBITDA threshold not met						$ 100,000,000
Minimum cash balance required, period January 1, 2014 to January 31, 2014 if EBITDA threshold not met						50,000,000
Minimum cash balance required after February 1, 2014 if EBITDA threshold not met						100,000,000
Pro Forma consolidated EBITDA										375,000,000
Minimum cash balance required, future period						50,000,000
Number of days restructuring transactions to be realizable						90 days
Increase in the interest rate payable, basis points						0.50%	0.50%
Net Cash Proceeds Received from Asset Sales Threshold						12,500,000.0
Amendment fee payment to each consenting lender as percent of outstanding exposure						1.00%	1.00%
One-time cash restructuring charges used in adjusting EBITDA											40,000,000
Adjusted EBITDA								274,800,000
Minimum cash balance	181,200,000
Maximum borrowing capacity								400,000,000
Total availability								233,700,000
Borrowing base								388,700,000
Net cash used in operating activities	3,000,000	48,000,000
Long-term Debt, Gross	1,359,100,000		1,381,000,000
Debt maturity amount on February 15, 2014	69,400,000
Debt maturity amount on September 30, 2014	325,500,000
Debt maturity amount on March 31, 2015	664,700,000
Defined Benefit Plan, Estimated Benefit Obligation for Remaining Fiscal Year				13,700,000	22,500,000
Operating Leases, Future Minimum Payments, Due Remainder of Fiscal Year	13,300,000
Operating Leases, Future Minimum Payments Due	165,600,000
Payments to Acquire Property, Plant, and Equipment	56,500,000	48,100,000
Operating lease commitment									$ 44,900,000
Operating lease term									6 years