Recent Transactions (Impairments On Properties Held and Used) (Narrative) (Details) $ in Thousands |
1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2015
USD ($)
ft²
property
|
Dec. 31, 2015
USD ($)
property
|
Sep. 30, 2015
USD ($)
ft²
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Sep. 30, 2013
USD ($)
|
Dec. 31, 2015
USD ($)
property
|
Dec. 31, 2013
USD ($)
|
Dec. 31, 2014
USD ($)
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| Real Estate Properties [Line Items] | |||||||||||
| Impairment charge | $ 33,743 | [1] | $ 164,176 | [1] | $ 197,919 | $ 110,853 | |||||
| Aggregate carrying value | 94,995 | 94,995 | $ 264,391 | ||||||||
| Mortgage loan | 731,076 | 731,076 | $ 820,910 | ||||||||
| Non-core Properties [Member] | |||||||||||
| Real Estate Properties [Line Items] | |||||||||||
| Impairment charge | $ 158,600 | ||||||||||
| Aggregate carrying value | $ 554,300 | 554,300 | |||||||||
| Number of impaired properties reduced to carrying value | property | 22 | ||||||||||
| Estimated fair value | $ 395,700 | $ 395,700 | |||||||||
| New Jersey [Member] | |||||||||||
| Real Estate Properties [Line Items] | |||||||||||
| Mortgage loan | $ 63,300 | $ 63,300 | |||||||||
| Number of real estate properties | property | 4 | 4 | |||||||||
| Roseland And Parsippany Properties [Member] | |||||||||||
| Real Estate Properties [Line Items] | |||||||||||
| Impairment charge | $ 5,600 | $ 12,500 | |||||||||
| Number of impaired properties | property | 3 | ||||||||||
| Area Of Real Estate Property | ft² | 479,877 | 479,877 | |||||||||
| New Jersey Hudson River [Member] | |||||||||||
| Real Estate Properties [Line Items] | |||||||||||
| Strategic initiative period | 3 years | ||||||||||
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- Definition Number Of Impaired Properties Reduced To Carrying Value No definition available.
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- Definition Number Of Impaired Real Estate Properties No definition available.
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- Definition Strategic Initiative Period No definition available.
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- Definition Area of a real estate property. No definition available.
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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The number of real estate properties owned as of the balance sheet date. No definition available.
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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. No definition available.
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- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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