|
Properties, net (Details) (USD $)
|
3 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
|
Mar. 31, 2014
|
Dec. 31, 2013
|
Mar. 31, 2014
Greater Philadelphia
|
Mar. 31, 2014
Operating properties, net
|
Dec. 31, 2013
Operating properties, net
|
Mar. 31, 2014
Operating properties, net
Land
|
Dec. 31, 2013
Operating properties, net
Land
|
Mar. 31, 2014
Operating properties, net
Buildings and improvements
|
Dec. 31, 2013
Operating properties, net
Buildings and improvements
|
|
| Properties | |||||||||
| Gross | $ 436,381,000 | $ 430,472,000 | $ 2,927,800,000 | $ 2,869,870,000 | |||||
| Less: accumulated depreciation | (635,178,000) | (597,649,000) | |||||||
| Operating properties, net | 2,729,003,000 | 2,702,693,000 | |||||||
| Depreciation Expense on Reclassified Assets | $ 12,900,000 |
| X | ||||||||||
|
- Definition
Additional depreciation expense recognized resulting from a change in the useful life of the disclosed asset. No definition available.
|
| 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 | ||||||||||
|
- Details
|
| 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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