Annual report pursuant to Section 13 and 15(d)

Discontinued Operations (Summary Of Income From Discontinued Operations And Related Realized And Unrealized Gains (Losses)) (Details)

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Discontinued Operations (Summary Of Income From Discontinued Operations And Related Realized And Unrealized Gains (Losses)) (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2013
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Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
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Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
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property
Dec. 31, 2012
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property
Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Total revenues                 $ 33,601,000 $ 66,882,000 $ 72,044,000
Operating and other expenses                 (13,454,000) (26,484,000) (29,624,000)
Depreciation and amortization                 (8,218,000) (17,765,000) (18,416,000)
Interest expense (net of interest income)                 (118,000) (755,000) (2,116,000)
Income from discontinued operations (9,000) 2,157,000 4,530,000 5,133,000 4,455,000 6,329,000 5,969,000 5,125,000 11,811,000 21,878,000 21,888,000
Loss from early extinguishment of debt     (703,000)           (703,000)    
Impairments                 (23,851,000) [1] (8,400,000) [1]  
Unrealized losses on disposition of rental property                   (9,213,000) [2]  
Realized gains on disposition of rental property                 83,371,000 [3] 4,438,000 [3]  
Realized gains (losses) and unrealized losses on disposition of rental property and impairments, net (1,559,000) [4] 47,321,000 13,758,000   (15,565,000) 12,000 (1,634,000) 4,012,000 59,520,000 (13,175,000)  
Total discontinued operations, net (1,568,000) 49,478,000 17,585,000 5,133,000 (11,110,000) 6,341,000 4,335,000 9,137,000 70,628,000 8,703,000 21,888,000
Area of property sold 3,006,409       269,958       3,006,409 269,958  
Valuation allowance 13,100,000               13,100,000    
Sales proceeds                 390,615,000 [5] 23,405,000  
Gain on sale of property                 83,371,000 [6] 87,000 [7]  
Number of buildings on properties sold 24       4       24 4  
Accumulated depreciation 1,400,988,000       1,478,214,000       1,400,988,000 1,478,214,000  
95 Chestnut Ridge Road [Member]
                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Area of property sold         47,700 [8]         47,700 [8]  
Valuation allowance         500,000         500,000  
Sales proceeds                   4,014,000 [8]  
Gain on sale of property                   0  
Number of buildings on properties sold         1 [8]         1 [8]  
Strawbridge Road [Member]
                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Area of property sold         222,258 [9]         222,258 [9]  
Valuation allowance         1,600,000         1,600,000  
Sales proceeds                   19,391,000 [9]  
Gain on sale of property                   87,000 [9]  
Number of buildings on properties sold         3 [9]         3 [9]  
19 Skyline Drive [Member]
                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Area of property sold 248,400 [10]               248,400 [10]    
Valuation allowance         7,100,000         7,100,000  
Sales proceeds                 16,131,000 [10]    
Gain on sale of property                 126,000 [10]    
Number of buildings on properties sold 1 [10]               1 [10]    
Area of property (in square feet)         248,400         248,400  
55 Corporate Drive [Member]
                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Area of property sold 204,057               204,057    
Sales proceeds                 70,967,000    
Gain on sale of property                 19,659,000    
Number of buildings on properties sold 1               1    
Area of property (in square feet)         204,057         204,057  
19 Skyline Drive And 55 Corporate Drive [Member]
                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Number of properties held for sale         2         2  
Value of property held for sale         60,900,000         60,900,000  
Accumulated depreciation         $ 16,800,000         $ 16,800,000  
[1] Represents impairment charges recorded on certain properties prior to their sale. See Note 3: Real Estate Transactions - Property Sales.
[2] Represents valuation allowances on properties identified as held for sale in 2012, as follows:At March 31, 2012, the Company identified as held for sale its 47,700 square foot office building located at 95 Chestnut Ridge Road in Montvale, New Jersey. The Company determined that the carrying amount of this property was not expected to be recovered from estimated net sales proceeds and, accordingly, recognized a valuation allowance of $0.5 million at March 31, 2012. On July 25, 2012, the Company sold the building for approximately $4.0 million (with no gain from the sale).At March 31, 2012, the Company identified as held for sale three office buildings totaling 222,258 square feet in Moorestown, New Jersey. The Company determined that the aggregate carrying amount of these properties was not expected to be recovered from estimated net sales proceeds and, accordingly, recognized a valuation allowance of $1.6 million at June 30, 2012. On November 7, 2012, the Company sold the buildings for approximately $74 million and recognized a loss of approximately $0.1 million from the sale.At December 31, 2012, the Company identified as held for sale its 248,400 square foot office building located at 19 Skyline Drive in Hawthorne, New York. The Company determined that the carrying amount of this property was not expected to be recovered from estimated sales proceeds and accordingly recognized a valuation allowance of $7.1 million at December 31, 2012. Also at December 31, 2012, the Company identified as held for sale its 204,057 square foot office building located at 55 Corporate Drive in Bridgewater, New Jersey. The two properties held for sale at December 31, 2012 carried an aggregate book value of $60.9 million, net of accumulated depreciation of $16.8 million and a valuation allowance of $19.4 million. As of April 10, 2013, the Company sold 19 Skyline Drive for approximately $16.1 million and recognized a gain of approximately $0.1 million. As of April 26, 2013, the Company sold 55 Corporate Drive for approximately $71 million and recognized a gain of approximately $19.7 million.
[3] See Note 3: Real Estate Transactions - Property Sales for further information regarding properties sold and related gains (losses).
[4] During the quarter ended December 31, 2013, the Company identified and recorded an out-of-period adjustment to reflect a charge of $1,559,000 to correct an error in its calculation of the gain on sale of rental property on a transaction that closed in the third quarter of 2013. In the third quarter, in recording the gain on the sale transaction, the Company did not include the full consolidated carrying amount of the property in computing the gain and, as a result, should have recognized a smaller gain by this amount. The Company has determined that this adjustment was not material to the quarter ended December 31, 2013 or the prior interim period.
[5] This amount excludes approximately $535,000 of net closing prorations and related adjustments received from sellers at closing.
[6] This amount, net of impairment charges recorded in 2013 of $23,851,000 on certain of the properties prior to their sale (per Note [d] above), comprises the $59,520,000 of realized gains (losses) and unrealized losses on disposition of rental property and impairments, net, for the year ended December 31, 2013.  See Note 7: Discontinued Operations.
[7] Also included in realized gains(loss) for the year ended December 31, 2012, was a $4.5 million gain recorded on the disposal of the office property located at 2200 Renaissance Boulevard. This office property, aggregating 174,124 square feet, was collateral for a $16.2 million mortgage loan scheduled to mature on December 1, 2012. The Company previously recorded an impairment charge on the property of $9.5 million at December 31, 2010. On March 28, 2012, the Company transferred the deed for 2200 Renaissance Boulevard to the lender in satisfaction of its obligations, which resulted in recording the gain.
[8] The Company recognized a valuation allowance of $0.5 million on this property at March 31, 2012.
[9] The Company recognized a valuation allowance of $1.6 million on these properties at June 30, 2012.
[10] The Company recognized a valuation allowance of $7.1 million on this property identified as held for sale at December 31, 2012. In connection with the sale, the Company provided an interest-free note receivable to the buyer of $5 million (with a net present value of $3.7 million at closing) which matures in 2023 and requires monthly payments of principal. See Note 5: Deferred charges, goodwill and other assets.