Investments in and Advances to Nonconsolidated Affiliates - Textual (Details) (USD $)
In Millions, unless otherwise specified |
Jun. 30, 2012
facilities
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Dec. 31, 2011
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Investments In and Advances to Nonconsolidated Affiliates (Textual) [Abstract] | ||
Investments In and Advances To Nonconsolidated Affiliates | $ 29.5 | $ 29.0 |
Number of Partially-Owned Subsidiaries, Nonconsolidated | 13 | |
Number of General or Limited Partnerships, Limited Liability Companies, or Joint Ventures, Nonconsolidated | 9 | |
Minimum [Member]
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Investments In and Advances to Nonconsolidated Affiliates (Textual) [Abstract] | ||
Nonconsolidated Affiliates, Ownership Percentage | 1.00% | |
Maximum [Member]
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Investments In and Advances to Nonconsolidated Affiliates (Textual) [Abstract] | ||
Nonconsolidated Affiliates, Ownership Percentage | 51.00% |