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SEC Schedule III Real Estate and Accumulated Depreciation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Real Estate And Accumulated Depreciation        
Encumbrances $ 6,674,215      
Initial cost to company        
Land 2,656,795      
Buildings and improvements 6,026,707      
Costs capitalized subsequent to acquisition 4,534,343      
Gross amount at which carried at close of period        
Land 2,540,193      
Buildings and improvements 10,677,652      
Total 13,217,845      
Accumulated depreciation and amortization 3,376,347 $ 3,169,446 $ 3,015,958 $ 3,180,175
Net basis difference of assets and liabilities between tax basis and GAAP basis $ 2,600,000      
Real estate and accumulated depreciation life used for depreciation 40 years      
Leasehold Improvements Equipment and Other        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 0      
Buildings and improvements 0      
Costs capitalized subsequent to acquisition 119,792      
Gross amount at which carried at close of period        
Land 0      
Buildings and improvements 119,792      
Total 119,792      
Accumulated depreciation and amortization 89,781      
New York        
Real Estate And Accumulated Depreciation        
Encumbrances 5,474,215      
Initial cost to company        
Land 2,156,392      
Buildings and improvements 4,746,627      
Costs capitalized subsequent to acquisition 3,781,463      
Gross amount at which carried at close of period        
Land 2,158,684      
Buildings and improvements 8,525,798      
Total 10,684,482      
Accumulated depreciation and amortization 2,474,234      
New York | Manhattan        
Real Estate And Accumulated Depreciation        
Encumbrances 5,374,215      
Initial cost to company        
Land 2,109,887      
Buildings and improvements 4,660,401      
Costs capitalized subsequent to acquisition 3,743,622      
Gross amount at which carried at close of period        
Land 2,111,143      
Buildings and improvements 8,402,767      
Total 10,513,910      
Accumulated depreciation and amortization 2,437,012      
New York | Manhattan | 1290 Avenue of the Americas        
Real Estate And Accumulated Depreciation        
Encumbrances 950,000      
Initial cost to company        
Land 518,244      
Buildings and improvements 926,992      
Costs capitalized subsequent to acquisition 268,355      
Gross amount at which carried at close of period        
Land 518,244      
Buildings and improvements 1,195,347      
Total 1,713,591      
Accumulated depreciation and amortization $ 440,097      
Date of construction 1963      
Date acquired 2007      
New York | Manhattan | One Park Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 525,000      
Initial cost to company        
Land 197,057      
Buildings and improvements 369,016      
Costs capitalized subsequent to acquisition 1,525      
Gross amount at which carried at close of period        
Land 197,057      
Buildings and improvements 370,541      
Total 567,598      
Accumulated depreciation and amortization $ 4,538      
Date of construction 1926      
Date acquired 2021      
New York | Manhattan | 350 Park Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 400,000      
Initial cost to company        
Land 265,889      
Buildings and improvements 363,381      
Costs capitalized subsequent to acquisition 49,025      
Gross amount at which carried at close of period        
Land 265,889      
Buildings and improvements 412,406      
Total 678,295      
Accumulated depreciation and amortization $ 157,691      
Date of construction 1960      
Date acquired 2006      
New York | Manhattan | PENN1        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 0      
Buildings and improvements 412,169      
Costs capitalized subsequent to acquisition 675,839      
Gross amount at which carried at close of period        
Land 0      
Buildings and improvements 1,088,008      
Total 1,088,008      
Accumulated depreciation and amortization $ 364,744      
Date of construction 1972      
Date acquired 1998      
New York | Manhattan | 100 West 33rd Street        
Real Estate And Accumulated Depreciation        
Encumbrances $ 398,402      
Initial cost to company        
Land 242,776      
Buildings and improvements 247,970      
Costs capitalized subsequent to acquisition 44,038      
Gross amount at which carried at close of period        
Land 242,776      
Buildings and improvements 292,008      
Total 534,784      
Accumulated depreciation and amortization $ 115,295      
Date of construction 1911      
Date acquired 2007      
New York | Manhattan | 150 West 34th Street        
Real Estate And Accumulated Depreciation        
Encumbrances $ 205,000      
Initial cost to company        
Land 119,657      
Buildings and improvements 268,509      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 119,657      
Buildings and improvements 268,509      
Total 388,166      
Accumulated depreciation and amortization $ 44,192      
Date of construction 1900      
Date acquired 2015      
New York | Manhattan | PENN2        
Real Estate And Accumulated Depreciation        
Encumbrances $ 575,000      
Initial cost to company        
Land 53,615      
Buildings and improvements 164,903      
Costs capitalized subsequent to acquisition 261,859      
Gross amount at which carried at close of period        
Land 52,689      
Buildings and improvements 427,688      
Total 480,377      
Accumulated depreciation and amortization $ 106,149      
Date of construction 1968      
Date acquired 1997      
New York | Manhattan | 90 Park Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 8,000      
Buildings and improvements 175,890      
Costs capitalized subsequent to acquisition 198,970      
Gross amount at which carried at close of period        
Land 8,000      
Buildings and improvements 374,860      
Total 382,860      
Accumulated depreciation and amortization $ 177,978      
Date of construction 1964      
Date acquired 1997      
New York | Manhattan | Manhattan Mall        
Real Estate And Accumulated Depreciation        
Encumbrances $ 181,598      
Initial cost to company        
Land 88,595      
Buildings and improvements 113,473      
Costs capitalized subsequent to acquisition 31,237      
Gross amount at which carried at close of period        
Land 88,595      
Buildings and improvements 144,710      
Total 233,305      
Accumulated depreciation and amortization $ 52,851      
Date of construction 2009      
Date acquired 2007      
New York | Manhattan | 770 Broadway        
Real Estate And Accumulated Depreciation        
Encumbrances $ 700,000      
Initial cost to company        
Land 52,898      
Buildings and improvements 95,686      
Costs capitalized subsequent to acquisition 188,436      
Gross amount at which carried at close of period        
Land 52,898      
Buildings and improvements 284,122      
Total 337,020      
Accumulated depreciation and amortization $ 127,420      
Date of construction 1907      
Date acquired 1998      
New York | Manhattan | 888 Seventh Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 299,400      
Initial cost to company        
Land 0      
Buildings and improvements 117,269      
Costs capitalized subsequent to acquisition 164,940      
Gross amount at which carried at close of period        
Land 0      
Buildings and improvements 282,209      
Total 282,209      
Accumulated depreciation and amortization $ 153,517      
Date of construction 1980      
Date acquired 1998      
New York | Manhattan | PENN11        
Real Estate And Accumulated Depreciation        
Encumbrances $ 500,000      
Initial cost to company        
Land 40,333      
Buildings and improvements 85,259      
Costs capitalized subsequent to acquisition 118,666      
Gross amount at which carried at close of period        
Land 40,333      
Buildings and improvements 203,925      
Total 244,258      
Accumulated depreciation and amortization $ 93,045      
Date of construction 1923      
Date acquired 1997      
New York | Manhattan | 909 Third Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 350,000      
Initial cost to company        
Land 0      
Buildings and improvements 120,723      
Costs capitalized subsequent to acquisition 121,136      
Gross amount at which carried at close of period        
Land 0      
Buildings and improvements 241,859      
Total 241,859      
Accumulated depreciation and amortization $ 122,466      
Date of construction 1969      
Date acquired 1999      
New York | Manhattan | 150 East 58th Street        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 39,303      
Buildings and improvements 80,216      
Costs capitalized subsequent to acquisition 57,661      
Gross amount at which carried at close of period        
Land 39,303      
Buildings and improvements 137,877      
Total 177,180      
Accumulated depreciation and amortization $ 71,938      
Date of construction 1969      
Date acquired 1998      
New York | Manhattan | 595 Madison Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 62,731      
Buildings and improvements 62,888      
Costs capitalized subsequent to acquisition 68,956      
Gross amount at which carried at close of period        
Land 62,731      
Buildings and improvements 131,844      
Total 194,575      
Accumulated depreciation and amortization $ 53,220      
Date of construction 1968      
Date acquired 1999      
New York | Manhattan | 330 West 34th Street        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 0      
Buildings and improvements 8,599      
Costs capitalized subsequent to acquisition 154,213      
Gross amount at which carried at close of period        
Land 0      
Buildings and improvements 162,812      
Total 162,812      
Accumulated depreciation and amortization $ 49,803      
Date of construction 1925      
Date acquired 1998      
New York | Manhattan | 715 Lexington Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 0      
Buildings and improvements 26,903      
Costs capitalized subsequent to acquisition 20,217      
Gross amount at which carried at close of period        
Land 30,085      
Buildings and improvements 17,035      
Total 47,120      
Accumulated depreciation and amortization $ 965      
Date of construction 1923      
Date acquired 2001      
New York | Manhattan | 484 To 486 Broadway        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 10,000      
Buildings and improvements 6,688      
Costs capitalized subsequent to acquisition 7,358      
Gross amount at which carried at close of period        
Land 10,000      
Buildings and improvements 14,046      
Total 24,046      
Accumulated depreciation and amortization $ 4,235      
Date of construction 2009      
Date acquired 2007      
New York | Manhattan | 4 Union Square South        
Real Estate And Accumulated Depreciation        
Encumbrances $ 120,000      
Initial cost to company        
Land 24,079      
Buildings and improvements 55,220      
Costs capitalized subsequent to acquisition 11,398      
Gross amount at which carried at close of period        
Land 24,079      
Buildings and improvements 66,618      
Total 90,697      
Accumulated depreciation and amortization $ 25,826      
Date of construction 1965/2004      
Date acquired 1993      
New York | Manhattan | Farley Office and Retail Building        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 0      
Buildings and improvements 476,235      
Costs capitalized subsequent to acquisition 911,408      
Gross amount at which carried at close of period        
Land 0      
Buildings and improvements 1,387,643      
Total 1,387,643      
Accumulated depreciation and amortization $ 4,189      
Date of construction 1912      
Date acquired 2018      
New York | Manhattan | 260 11th Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 0      
Buildings and improvements 80,482      
Costs capitalized subsequent to acquisition 5,530      
Gross amount at which carried at close of period        
Land 0      
Buildings and improvements 86,012      
Total 86,012      
Accumulated depreciation and amortization $ 14,146      
Date of construction 1911      
Date acquired 2015      
New York | Manhattan | 510 5th Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 34,602      
Buildings and improvements 18,728      
Costs capitalized subsequent to acquisition 36,745      
Gross amount at which carried at close of period        
Land 48,403      
Buildings and improvements 41,672      
Total 90,075      
Accumulated depreciation and amortization $ 12,270      
Date acquired 2010      
New York | Manhattan | 606 Broadway        
Real Estate And Accumulated Depreciation        
Encumbrances $ 74,119      
Initial cost to company        
Land 45,406      
Buildings and improvements 8,993      
Costs capitalized subsequent to acquisition 51,709      
Gross amount at which carried at close of period        
Land 45,298      
Buildings and improvements 60,810      
Total 106,108      
Accumulated depreciation and amortization $ 4,213      
Date acquired 2016      
New York | Manhattan | 40 Fulton Street        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 15,732      
Buildings and improvements 26,388      
Costs capitalized subsequent to acquisition 41,597      
Gross amount at which carried at close of period        
Land 15,732      
Buildings and improvements 67,985      
Total 83,717      
Accumulated depreciation and amortization $ 25,521      
Date of construction 1987      
Date acquired 1998      
New York | Manhattan | 443 Broadway        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 11,187      
Buildings and improvements 41,186      
Costs capitalized subsequent to acquisition (36,197)      
Gross amount at which carried at close of period        
Land 3,457      
Buildings and improvements 12,719      
Total 16,176      
Accumulated depreciation and amortization $ 391      
Date acquired 2013      
New York | Manhattan | 435 7th Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 95,696      
Initial cost to company        
Land 19,893      
Buildings and improvements 19,091      
Costs capitalized subsequent to acquisition 2,166      
Gross amount at which carried at close of period        
Land 19,893      
Buildings and improvements 21,257      
Total 41,150      
Accumulated depreciation and amortization $ 10,732      
Date of construction 2002      
Date acquired 1997      
New York | Manhattan | 692 Broadway        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 6,053      
Buildings and improvements 22,908      
Costs capitalized subsequent to acquisition 3,901      
Gross amount at which carried at close of period        
Land 6,053      
Buildings and improvements 26,809      
Total 32,862      
Accumulated depreciation and amortization $ 11,503      
Date acquired 2005      
New York | Manhattan | 131-135 West 33rd Street        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 8,315      
Buildings and improvements 21,312      
Costs capitalized subsequent to acquisition 477      
Gross amount at which carried at close of period        
Land 8,315      
Buildings and improvements 21,789      
Total 30,104      
Accumulated depreciation and amortization $ 3,161      
Date acquired 2016      
New York | Manhattan | 304 Canal Street        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 3,511      
Buildings and improvements 12,905      
Costs capitalized subsequent to acquisition (8,456)      
Gross amount at which carried at close of period        
Land 1,771      
Buildings and improvements 6,189      
Total 7,960      
Accumulated depreciation and amortization $ 169      
Date of construction 1910      
Date acquired 2014      
New York | Manhattan | 1131 Third Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 7,844      
Buildings and improvements 7,844      
Costs capitalized subsequent to acquisition 5,683      
Gross amount at which carried at close of period        
Land 7,844      
Buildings and improvements 13,527      
Total 21,371      
Accumulated depreciation and amortization $ 3,093      
Date acquired 1997      
New York | Manhattan | 431 Seventh Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 16,700      
Buildings and improvements 2,751      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 16,700      
Buildings and improvements 2,751      
Total 19,451      
Accumulated depreciation and amortization $ 1,014      
Date acquired 2007      
New York | Manhattan | 138-142 West 32nd Street        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 9,252      
Buildings and improvements 9,936      
Costs capitalized subsequent to acquisition 2,002      
Gross amount at which carried at close of period        
Land 9,252      
Buildings and improvements 11,938      
Total 21,190      
Accumulated depreciation and amortization $ 1,844      
Date of construction 1920      
Date acquired 2015      
New York | Manhattan | 334 Canal Street        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 1,693      
Buildings and improvements 6,507      
Costs capitalized subsequent to acquisition (1,170)      
Gross amount at which carried at close of period        
Land 752      
Buildings and improvements 6,278      
Total 7,030      
Accumulated depreciation and amortization $ 205      
Date acquired 2011      
New York | Manhattan | 966 Third Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 8,869      
Buildings and improvements 3,631      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 8,869      
Buildings and improvements 3,631      
Total 12,500      
Accumulated depreciation and amortization $ 756      
Date acquired 2013      
New York | Manhattan | 148 Spring Street        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 3,200      
Buildings and improvements 8,112      
Costs capitalized subsequent to acquisition 398      
Gross amount at which carried at close of period        
Land 3,200      
Buildings and improvements 8,510      
Total 11,710      
Accumulated depreciation and amortization $ 2,941      
Date acquired 2008      
New York | Manhattan | 150 Spring Street        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 3,200      
Buildings and improvements 5,822      
Costs capitalized subsequent to acquisition 312      
Gross amount at which carried at close of period        
Land 3,200      
Buildings and improvements 6,134      
Total 9,334      
Accumulated depreciation and amortization $ 2,109      
Date acquired 2008      
New York | Manhattan | 137 West 33rd Street        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 6,398      
Buildings and improvements 1,550      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 6,398      
Buildings and improvements 1,550      
Total 7,948      
Accumulated depreciation and amortization $ 262      
Date of construction 1932      
Date acquired 2015      
New York | Manhattan | 825 7th Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 1,483      
Buildings and improvements 697      
Costs capitalized subsequent to acquisition 3,940      
Gross amount at which carried at close of period        
Land 1,483      
Buildings and improvements 4,637      
Total 6,120      
Accumulated depreciation and amortization $ 829      
Date acquired 1997      
New York | Manhattan | 537 West 26th Street        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 10,370      
Buildings and improvements 17,632      
Costs capitalized subsequent to acquisition 19,925      
Gross amount at which carried at close of period        
Land 26,631      
Buildings and improvements 21,296      
Total 47,927      
Accumulated depreciation and amortization $ 2,062      
Date acquired 2018      
New York | Manhattan | 339 Greenwich        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 2,622      
Buildings and improvements 12,333      
Costs capitalized subsequent to acquisition (10,019)      
Gross amount at which carried at close of period        
Land 865      
Buildings and improvements 4,071      
Total 4,936      
Accumulated depreciation and amortization $ 123      
Date acquired 2017      
New York | Manhattan | Other (Including Signage)        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 140,477      
Buildings and improvements 31,892      
Costs capitalized subsequent to acquisition 3,477      
Gross amount at which carried at close of period        
Land 94,788      
Buildings and improvements 81,058      
Total 175,846      
Accumulated depreciation and amortization 23,571      
Other | Paramus        
Real Estate And Accumulated Depreciation        
Encumbrances 100,000      
Initial cost to company        
Land 46,505      
Buildings and improvements 86,226      
Costs capitalized subsequent to acquisition 37,841      
Gross amount at which carried at close of period        
Land 47,541      
Buildings and improvements 123,031      
Total 170,572      
Accumulated depreciation and amortization 37,222      
Other | Illinois | the Mart, Chicago        
Real Estate And Accumulated Depreciation        
Encumbrances 0      
Initial cost to company        
Land 64,528      
Buildings and improvements 319,146      
Costs capitalized subsequent to acquisition 413,854      
Gross amount at which carried at close of period        
Land 64,535      
Buildings and improvements 732,993      
Total 797,528      
Accumulated depreciation and amortization $ 369,439      
Date of construction 1930      
Date acquired 1998      
Other | Illinois | 527 West Kinzie, Chicago        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 5,166      
Buildings and improvements 0      
Costs capitalized subsequent to acquisition 197      
Gross amount at which carried at close of period        
Land 5,166      
Buildings and improvements 197      
Total 5,363      
Accumulated depreciation and amortization $ 0      
Date acquired 1998      
Other | Illinois | Total The Mart        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 69,694      
Buildings and improvements 319,146      
Costs capitalized subsequent to acquisition 433,195      
Gross amount at which carried at close of period        
Land 69,701      
Buildings and improvements 752,334      
Total 822,035      
Accumulated depreciation and amortization 373,344      
Other | New York | Hotel Pennsylvania        
Real Estate And Accumulated Depreciation        
Encumbrances 0      
Initial cost to company        
Land 29,903      
Buildings and improvements 121,712      
Costs capitalized subsequent to acquisition 266,365      
Gross amount at which carried at close of period        
Land 29,903      
Buildings and improvements 388,077      
Total 417,980      
Accumulated depreciation and amortization $ 145,938      
Date of construction 1919      
Date acquired 1997      
Other | New York | 33-00 Northern Boulevard        
Real Estate And Accumulated Depreciation        
Encumbrances $ 100,000      
Initial cost to company        
Land 46,505      
Buildings and improvements 86,226      
Costs capitalized subsequent to acquisition 14,493      
Gross amount at which carried at close of period        
Land 46,505      
Buildings and improvements 100,719      
Total 147,224      
Accumulated depreciation and amortization $ 17,829      
Date of construction 1915      
Date acquired 2015      
Other | New York | Piers 92 and 94        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 0      
Buildings and improvements 0      
Costs capitalized subsequent to acquisition 19,144      
Gross amount at which carried at close of period        
Land 0      
Buildings and improvements 19,144      
Total 19,144      
Accumulated depreciation and amortization $ 3,905      
Date acquired 2008      
Other | New York | 220 Central Park South        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 115,720      
Buildings and improvements 16,445      
Costs capitalized subsequent to acquisition (106,014)      
Gross amount at which carried at close of period        
Land 0      
Buildings and improvements 26,151      
Total 26,151      
Accumulated depreciation and amortization $ 0      
Date acquired 2005      
Other | New York | Borgata Land, Atlantic City, NJ        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 83,089      
Buildings and improvements 0      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 83,089      
Buildings and improvements 0      
Total 83,089      
Accumulated depreciation and amortization $ 0      
Date acquired 2010      
Other | New York | 759-771 Madison Avenue        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 8,454      
Buildings and improvements 13,321      
Costs capitalized subsequent to acquisition (8,193)      
Gross amount at which carried at close of period        
Land 5,273      
Buildings and improvements 8,309      
Total 13,582      
Accumulated depreciation and amortization $ 3,101      
Date acquired 2005      
Other | New York | Annapolis        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 0      
Buildings and improvements 9,652      
Costs capitalized subsequent to acquisition 0      
Gross amount at which carried at close of period        
Land 0      
Buildings and improvements 9,652      
Total 9,652      
Accumulated depreciation and amortization $ 4,713      
Date acquired 2005      
Other | New York | Other Property        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 0      
Buildings and improvements 0      
Costs capitalized subsequent to acquisition 10,035      
Gross amount at which carried at close of period        
Land 0      
Buildings and improvements 10,035      
Total 10,035      
Accumulated depreciation and amortization 1,942      
Other | Maryland | Wayne Towne Center        
Real Estate And Accumulated Depreciation        
Encumbrances 0      
Initial cost to company        
Land 0      
Buildings and improvements 26,137      
Costs capitalized subsequent to acquisition 47,347      
Gross amount at which carried at close of period        
Land 0      
Buildings and improvements 73,484      
Total 73,484      
Accumulated depreciation and amortization $ 34,112      
Date acquired 2010      
Other | New Jersey | Paramus        
Real Estate And Accumulated Depreciation        
Encumbrances $ 0      
Initial cost to company        
Land 0      
Buildings and improvements 0      
Costs capitalized subsequent to acquisition 23,348      
Gross amount at which carried at close of period        
Land 1,036      
Buildings and improvements 22,312      
Total 23,348      
Accumulated depreciation and amortization $ 19,393      
Date of construction 1967      
Date acquired 1987      
Other | New Jersey | Other Property        
Real Estate And Accumulated Depreciation        
Encumbrances $ 1,200,000      
Initial cost to company        
Land 500,403      
Buildings and improvements 1,280,080      
Costs capitalized subsequent to acquisition 633,088      
Gross amount at which carried at close of period        
Land 381,509      
Buildings and improvements 2,032,062      
Total 2,413,571      
Accumulated depreciation and amortization 812,332      
Other | California | 555 California Street        
Real Estate And Accumulated Depreciation        
Encumbrances 1,200,000      
Initial cost to company        
Land 223,446      
Buildings and improvements 895,379      
Costs capitalized subsequent to acquisition 256,718      
Gross amount at which carried at close of period        
Land 223,446      
Buildings and improvements 1,152,097      
Total 1,375,543      
Accumulated depreciation and amortization $ 395,120      
Date of construction 1922,1969 -1970      
Date acquired 2007