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Discontinued Operations: (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 1 Months Ended | 12 Months Ended |  | 1 Months Ended |  | 1 Months Ended |  | 1 Months Ended |  | 1 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | May 31, 2012 Mervyn's | Nov. 30, 2011 Mervyn's | Oct. 31, 2011 Mervyn's | Mar. 31, 2011 Mervyn's | Jul. 31, 2009 Mervyn's item | Dec. 31, 2011 Shoppingtown Mall | Jun. 29, 2011 Shoppingtown Mall | Apr. 30, 2012 Valley View Mall | Mar. 31, 2012 Valley View Mall | Apr. 30, 2012 The Borgata sqft | May 31, 2012 Hilton Village. | May 17, 2012 Hilton Village. sqft | May 31, 2012 Prescott Gateway sqft | Jun. 30, 2012 Carmel Plaza | Jun. 28, 2012 Carmel Plaza sqft | Jun. 30, 2011 GGP Exchange store | Jun. 30, 2011 GGP Exchange Mervyn's entity
Discontinued Operations: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment charge |  |  |  |  |  |  |  |  |  | $ 35,729 |  | $ 54,306 |  |  |  |  |  |  |  |
Number of locations sold |  |  |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale |  |  |  | 20,750 | 2,300 | 8,061 | 3,732 |  |  |  |  |  | 9,150 | 24,820 |  |  | 52,000 |  |  |
Gain (loss) from sale | 74,833 | (58,230) | (23) | (407) | (200) | 3,783 | (1,913) |  |  |  |  |  | (1,275) | 3,127 |  |  | 7,844 |  |  |
Property square footage |  |  |  |  |  |  |  |  |  |  |  |  | 94,000 |  | 80,000 | 584,000 |  | 112,000 |  |
Long-lived assets written off to fair value |  |  |  |  |  |  |  |  |  | 38,968 |  | 33,450 |  |  |  |  |  |  |  |
Gain (loss) on extinguishment of debt |  | (10,588) | 3,661 |  |  |  |  |  | (3,929) |  | 104,023 |  |  |  |  | 16,296 |  |  |  |
Number of anchor locations exchanged |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 | 5
Revenues from discontinued operations | 10,601 | 39,931 | 47,002 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) income from discontinued operations | $ 69,365 | $ (74,871) | $ (10,350) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Long-lived assets that are held for sale apart from normal operations and anticipated to be sold in less than one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 33 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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