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Properties, net (Details) (USD $)
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9 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2014
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Dec. 31, 2013
|
Sep. 30, 2014
Greater Philadelphia
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Sep. 30, 2014
Operating properties, net
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Dec. 31, 2013
Operating properties, net
|
Sep. 30, 2014
Operating properties, net
Land
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Dec. 31, 2013
Operating properties, net
Land
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Sep. 30, 2014
Operating properties, net
Buildings and improvements
|
Dec. 31, 2013
Operating properties, net
Buildings and improvements
|
|
| Investments in real estate | |||||||||
| Gross | $ 439,355,000 | $ 430,472,000 | $ 2,997,450,000 | $ 2,869,870,000 | |||||
| Less: accumulated depreciation | (679,598,000) | (597,649,000) | |||||||
| Operating properties, net | 2,757,207,000 | 2,702,693,000 | |||||||
| Depreciation expense on reclassified assets | $ 12,900,000 |
| X | ||||||||||
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- Definition
Additional depreciation expense recognized resulting from a change in the useful life of the disclosed asset. No definition available.
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| X | ||||||||||
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- Definition
Amount, before accumulated depreciation, of real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The cumulative amount of depreciation for real estate property held for investment purposes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Carrying amount of income producing properties held for rental. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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