Quarterly report pursuant to Section 13 or 15(d)

Real Estate Transactions (Schedule Of Property Sales) (Details)

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Real Estate Transactions (Schedule Of Property Sales) (Details) (USD $)
 6 Months Ended 12 Months Ended
Jun. 30, 2014
item
sqft
Dec. 31, 2013
property
sqft
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Number of Buildings 9 24
Rentable Square Feet 1,694,563 3,000,000
Net Sales Proceeds $ 235,322,000 $ 390,600,000
Net Book Value 180,738,000  
Realized Gain (loss) 54,584,000  
Ownership interest 11.10% 11.90%
22 Sylvan Way [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Number of Buildings 1  
Rentable Square Feet 249,409  
Net Sales Proceeds 94,897,000  
Net Book Value 60,244,000  
Realized Gain (loss) 34,653,000  
30 Knightsbridge Road [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Number of Buildings 4 [1]  
Rentable Square Feet 680,350 [1]  
Net Sales Proceeds 54,641,000 [1]  
Net Book Value 52,361,000 [1]  
Realized Gain (loss) 2,280,000 [1]  
470 Chestnut Ridge Road [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Number of Buildings 1 [1],[2]  
Rentable Square Feet 52,500 [1],[2]  
Net Sales Proceeds 7,195,000 [1],[2]  
Net Book Value 7,109,000 [1],[2]  
Realized Gain (loss) 86,000 [1],[2]  
530 Chestnut Ridge Road [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Number of Buildings 1 [1],[2]  
Rentable Square Feet 57,204 [1],[2]  
Net Sales Proceeds 6,299,000 [1],[2]  
Net Book Value 6,235,000 [1],[2]  
Realized Gain (loss) 64,000 [1],[2]  
400 Rella Boulevard [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Number of Buildings 1  
Rentable Square Feet 180,000  
Net Sales Proceeds 27,539,000  
Net Book Value 10,938,000  
Realized Gain (loss) 16,601,000  
412 Mt. Kemble Avenue [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Number of Buildings 1 [1]  
Rentable Square Feet 475,100 [1]  
Net Sales Proceeds 44,751,000 [1]  
Net Book Value 43,851,000 [1]  
Realized Gain (loss) 900,000 [1]  
30 Knightsbridge Road, 470 Chestnut Ridge Road, 530 Chestnut Ridge Road And 412 Mount Kemble Avenue [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Net Sales Proceeds 112,900,000  
Sale price of property 117,000,000  
Sale price of property, cash 114,600,000  
Sale price of property, capital accounts 2,400,000  
Closing costs paid 1,700,000  
Ownership interest 0.00%  
30 Knightsbridge Road, 470 Chestnut Ridge Road, 530 Chestnut Ridge Road And 412 Mount Kemble Avenue [Member] | Keystone Entities [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Internal rate of return 15.00%  
30 Knightsbridge Road, 470 Chestnut Ridge Road, 530 Chestnut Ridge Road And 412 Mount Kemble Avenue [Member] | Parent Company [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Internal rate of return 10.00%  
7 Property Group [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Sale price of property 104,000,000  
Sale price of property, cash 78,300,000  
Sale price of property, capital accounts 18,800,000  
Number of properties held for sale 7  
Area of real estate property held for sale (in square feet) 928,258  
Number of properties with senior pari passu interest 3  
Sale price of property, capital balance in properties in which senior pari passu interest is held 6,900,000  
470 Chestnut Ridge Road And 530 Chestnut Ridge Road [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Impairment charge   $ 3,900,000
[1] The Company completed the sale of these properties for approximately $117 million: $114.6 million in cash and subordinated equity interests in each of the properties sold with capital accounts aggregating $2.4 million. Net sale proceeds from the sale aggregated $112.9 million which was comprised of the $117 million gross sales price less the subordinated equity interests of $2.4 million and $1.7 million in closing costs. The purchasers of these properties are joint ventures formed between the Company and affiliates of the Keystone Property Group (“Keystone Entities”). The senior equity will receive a 15 percent internal rate of return (“IRR”) after which the subordinated equity will receive a ten percent IRR and then all distributable cash flow will be split equally between the Keystone Entities and the Company. In connection with these partial sale transactions, because the buyer receives a preferential return, the Company only recognized profit to the extent that they received net proceeds in excess of their entire carrying value of the properties, effectively reflecting their retained subordinate equity interest at zero. The Company has contracts with Keystone Entities to sell an additional seven of its office properties in New Jersey, New York and Connecticut, aggregating approximately 928,258 square feet, for approximately $104 million, comprised of: $78.3 million in cash from a combination of Keystone Entities senior and pari-passu equity and mortgage financing; Company subordinated equity interests in each of the properties being sold with capital accounts aggregating $18.8 million; and Company pari passu equity interests in three of the properties being sold aggregating $6.9 million.
[2] The Company recorded an impairment charge of $3.9 million on these properties at December 31, 2013 as it estimated that the carrying value of the properties may not be recoverable over their anticipated holding periods.