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Commitments and Contingencies - Countywide Matters (Details Textual 2) (USD $)
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3 Months Ended | ||||||
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Mar. 31, 2013
LegalMatter
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Dec. 31, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Sep. 09, 2010
Plaintiffs
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Oct. 13, 2009
Plaintiffs
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Oct. 08, 2008
Plaintiffs
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| Commitments and Contingencies [Line Items] | |||||||
| Remediation liability | $ 557,300,000 | $ 563,700,000 | $ 530,000,000 | $ 543,700,000 | |||
| Number of plaintiffs filed cases in the Tuscarawas County Ohio Court of Common Pleas | 600 | 82 | 700 | ||||
| Actions consolidated in an order issued by court | 2 | ||||||
| Amount of compensatory damages as relief requested | 25,000 | ||||||
| Counts of amended complaint | 3 | ||||||
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Countywide Landfill [Member]
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| Commitments and Contingencies [Line Items] | |||||||
| Remediation liability | 51,700,000 | ||||||
| Expected remediation liability to be paid during the next 12 months | 4,500,000 | ||||||
| Range of loss for remediation costs (minimum) | 49,000,000 | ||||||
| Range of loss for remediation costs (maximum) | $ 70,000,000 |