Quarterly report pursuant to Section 13 or 15(d)

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

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Investments In Unconsolidated Joint Ventures (Summary Of The Results Of Operations) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Schedule of Equity Method Investments [Line Items]    
Total revenues $ 11,704 $ 10,827
Operating and other (7,179) (7,221)
Depreciation and amortization (2,390) (2,911)
Interest expense (1,690) (1,643)
Net income 445 (948)
Company's equity in earnings (loss) of unconsolidated joint ventures 600 (101)
Plaza VIII & IX Associates [Member]
    
Schedule of Equity Method Investments [Line Items]    
Total revenues 229 194
Operating and other (55) (51)
Depreciation and amortization (153) (153)
Net income 21 (10)
Company's equity in earnings (loss) of unconsolidated joint ventures 10 (5)
Harborside South Pier [Member]
    
Schedule of Equity Method Investments [Line Items]    
Total revenues 8,161 7,635
Operating and other (5,631) (5,734)
Depreciation and amortization (1,403) (1,424)
Interest expense (1,102) (1,125)
Net income 25 (648)
Company's equity in earnings (loss) of unconsolidated joint ventures 12 (161)
Red Bank Corporate Plaza [Member]
    
Schedule of Equity Method Investments [Line Items]    
Total revenues 847 727
Operating and other (234) (127)
Depreciation and amortization (228) (225)
Interest expense (179) (80)
Net income 206 295
Company's equity in earnings (loss) of unconsolidated joint ventures 103 147
Gramercy Agreement [Member]
    
Schedule of Equity Method Investments [Line Items]    
Total revenues 1,346 1,809
Operating and other (881) (917)
Depreciation and amortization (453) (793)
Interest expense (388) (402)
Net income (376) (303)
12 Vreeland [Member]
    
Schedule of Equity Method Investments [Line Items]    
Total revenues 594 396
Operating and other (22) (18)
Depreciation and amortization (153) (316)
Interest expense (21) (36)
Net income 398 26
Company's equity in earnings (loss) of unconsolidated joint ventures 199 13
Boston-Downtown Crossing [Member]
    
Schedule of Equity Method Investments [Line Items]    
Operating and other (334) (374)
Net income (334) (374)
Company's equity in earnings (loss) of unconsolidated joint ventures (100) (112)
Gale Jefferson [Member]
    
Schedule of Equity Method Investments [Line Items]    
Total revenues 60 66
Net income 60 66
Company's equity in earnings (loss) of unconsolidated joint ventures 20 17
Stamford SM LLC [Member]
    
Schedule of Equity Method Investments [Line Items]    
Total revenues 467  
Operating and other (22)  
Net income 445  
Company's equity in earnings (loss) of unconsolidated joint ventures $ 356