Quarterly report pursuant to Section 13 or 15(d)

Investments In Unconsolidated Joint Ventures (Summary Of The Results Of Financial Position) (Details)

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Investments In Unconsolidated Joint Ventures (Summary Of The Results Of Financial Position) (Details) (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
Rental property, net $ 145,438 $ 152,372
Other assets 70,871 76,041
Total assets 216,309 228,413
Mortgages, loans payable and other obligations 141,974 146,731
Other liabilities 6,592 7,305
Partners'/members' capital (deficit) 67,743 74,377
Total liabilities and partners'/members' capital (deficit) 216,309 228,413
Company's investment in unconsolidated joint ventures, net 31,991 34,220
Plaza VIII & IX Associates [Member]
    
Rental property, net 8,488 8,947
Other assets 746 906
Total assets 9,234 9,853
Other liabilities 532 529
Partners'/members' capital (deficit) 8,702 9,324
Total liabilities and partners'/members' capital (deficit) 9,234 9,853
Company's investment in unconsolidated joint ventures, net 4,273 4,584
Harborside South Pier [Member]
    
Rental property, net 60,937 64,964
Other assets 12,430 11,681
Total assets 73,367 76,645
Mortgages, loans payable and other obligations 70,964 72,168
Other liabilities 4,745 4,356
Partners'/members' capital (deficit) (2,342) 121
Total liabilities and partners'/members' capital (deficit) 73,367 76,645
Company's investment in unconsolidated joint ventures, net (70) 1,161
Red Bank Corporate Plaza [Member]
    
Rental property, net 23,020 23,594
Other assets 2,791 6,422
Total assets 25,811 30,016
Mortgages, loans payable and other obligations 18,280 20,424
Other liabilities 58 89
Partners'/members' capital (deficit) 7,473 9,503
Total liabilities and partners'/members' capital (deficit) 25,811 30,016
Company's investment in unconsolidated joint ventures, net 3,607 4,598
Gramercy Agreement [Member]
    
Rental property, net 39,578 40,786
Other assets 5,767 6,261
Total assets 45,345 47,047
Mortgages, loans payable and other obligations 50,978 50,978
Other liabilities 1,196 1,719
Partners'/members' capital (deficit) (6,829) (5,650)
Total liabilities and partners'/members' capital (deficit) 45,345 47,047
Princeton Forrestal Village [Member]
    
Other assets 181 1,435
Total assets 181 1,435
Other liabilities 61 612
Partners'/members' capital (deficit) 120 823
Total liabilities and partners'/members' capital (deficit) 181 1,435
Gale Kimball [Member]
    
Other assets 44 51
Total assets 44 51
Partners'/members' capital (deficit) 44 51
Total liabilities and partners'/members' capital (deficit) 44 51
12 Vreeland [Member]
    
Rental property, net 13,415 14,081
Other assets 175 734
Total assets 13,590 14,815
Mortgages, loans payable and other obligations 1,752 3,161
Partners'/members' capital (deficit) 11,838 11,654
Total liabilities and partners'/members' capital (deficit) 13,590 14,815
Company's investment in unconsolidated joint ventures, net 10,103 9,860
Boston-Downtown Crossing [Member]
    
Other assets 46,080 46,111
Total assets 46,080 46,111
Partners'/members' capital (deficit) 46,080 46,111
Total liabilities and partners'/members' capital (deficit) 46,080 46,111
Company's investment in unconsolidated joint ventures, net 13,015 13,022
Gale Jefferson [Member]
    
Other assets 2,657 2,440
Total assets 2,657 2,440
Partners'/members' capital (deficit) 2,657 2,440
Total liabilities and partners'/members' capital (deficit) 2,657 2,440
Company's investment in unconsolidated joint ventures, net $ 1,063 $ 995