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Divestitures - Gulf Properties Disposal - Revenue and Expense Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Disposal, Revenue and Expense Information |  |  |  |  |
Revenues |  | $ 180,152 | $ 394,107 | $ 625,067 | $ 1,211,877
Expenses |  | $ 1,239,885 | $ 137,616 | $ 4,308,339 | 995,637
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Gulf Properties |  |  |  |  |
Disposal, Revenue and Expense Information |  |  |  |  |
Revenues | [1] |  |  |  | 90,920
Expenses | [1] |  |  |  | $ 63,674
[1] | Includes revenues and expenses through February 25, 2014, the date of the sale.

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- Definition Total costs of sales and operating expenses for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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