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Schedule I - Supplemental Cash Flow Information and Disclosures of Non-Cash Transactions (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |||||||
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Condensed Financial Statements, Captions [Line Items] | ||||||||
| Gain on sale of limited partnership investment | $ 0 | $ (128,330) | $ 0 | |||||
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Parent [Member]
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| Condensed Financial Statements, Captions [Line Items] | ||||||||
| Gain on sale of limited partnership investment | $ (24,356) | [1] | $ 54,308 | [1] | $ 181,151 | [1] | ||
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The difference between the carrying value and the sale price of equity securities, not separately or otherwise categorized as trading or available-for-sale. This element includes investments in which the entity holds a small ownership stake (generally, less than 20% of the shares outstanding) and cannot exert significant influence. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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