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Properties, net (Details 2) (USD $) In Thousands | Jun. 30, 2011 | Dec. 31, 2010
--- | --- | ---
Properties |  |
Properties under construction or development | $ 656,321 | $ 642,682
Projects under construction or development | Land, development |  |
Properties |  |
Properties under construction or development | 248,647 | 256,487
Projects under construction or development | Construction in progress, excluding land |  |
Properties |  |
Properties under construction or development | $ 407,674 | $ 386,195

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- Definition The current amount of expenditures for a real estate project that has not yet been completed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.10) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + Details
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Namespace Prefix: | us-gaap
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