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Liquidity (Risks and Uncertainties) (Details) (USD $)
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12 Months Ended |
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Risks and Uncertainties [Line Items] |
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| Net cash used in operating activities |
$ 12,100,000 |
$ (25,900,000) |
$ (26,000,000) |
| Aggregate principal amount of outstanding indebtness |
1,363,400,000 |
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| Future operating lease obligations |
56,100,000 |
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| Capital expenditures |
66,900,000 |
66,400,000 |
71,600,000 |
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Other Postretirement Benefit Plans, Defined Benefit [Member]
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| Risks and Uncertainties [Line Items] |
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| Funding obligations for pension plans |
79,900,000 |
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Multiemployer Plans, Pension [Member]
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| Risks and Uncertainties [Line Items] |
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| Funding obligations for pension plans |
88,700,000 |
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ABL Facility Credit Agreement [Member]
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| Risks and Uncertainties [Line Items] |
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| Maximum borrowing capacity |
400,000,000 |
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| Line of credit facility, total availability |
227,800,000 |
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| Line of credit facility, remaining borrowing capacity |
376,400,000 |
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2014 ABL Facility Credit Agreement [Member] [Member]
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| Risks and Uncertainties [Line Items] |
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| Maximum borrowing capacity |
450,000,000 |
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Revenue equipment [Member]
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| Risks and Uncertainties [Line Items] |
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| Operating Lease Commitment |
$ 67,100,000 |
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| Operating Lease Term |
6 years |
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