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Real Estate and Accumulated Depreciation (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 1,088,613 |  |  |
Cost capitalized subsequent to acquisition | 1,532,492 |  |  |
Land and Land Improvements | 511,529 |  |  |
Buildings and Improvements, Gross | 1,595,023 |  |  |
Construction in progress | 514,553 | $ 322,226 |  |
Real estate investments | 2,621,105 | 2,408,136 | $ 2,284,126 | $ 2,124,796
Accumulated Depreciation | 729,470 | 688,475 | $ 650,113 | $ 607,706
Total real estate investments, net | 1,891,635 | 1,719,661 |  |
Fixed rate mortgages | 935,451 | 961,577 |  |
Development land, related debt | 77,305 | $ 0 |  |
Total, related debt | 1,030,285 |  |  |
Shopping Centers |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | 835,537 |  |  |
Cost capitalized subsequent to acquisition | 501,528 |  |  |
Land and Land Improvements | 420,132 |  |  |
Buildings and Improvements, Gross | 903,264 |  |  |
Construction in progress | 13,669 |  |  |
Real estate investments | 1,337,065 |  |  |
Accumulated Depreciation | 480,348 |  |  |
Total real estate investments, net | 856,717 |  |  |
Fixed rate mortgages | 584,145 |  |  |
Shopping Centers | Ashbrook Marketplace, Ashburn, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | 8,938 |  |  |
Cost capitalized subsequent to acquisition | 25,443 |  |  |
Land and Land Improvements | 13,258 |  |  |
Buildings and Improvements, Gross | 21,074 |  |  |
Construction in progress | 49 |  |  |
Real estate investments | 34,381 |  |  |
Accumulated Depreciation | 2,745 |  |  |
Total real estate investments, net | 31,636 |  |  |
Fixed rate mortgages | $ 20,216 |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Shopping Centers | Ashburn Village, Ashburn, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 11,431 |  |  |
Cost capitalized subsequent to acquisition | 21,000 |  |  |
Land and Land Improvements | 6,764 |  |  |
Buildings and Improvements, Gross | 25,658 |  |  |
Construction in progress | 9 |  |  |
Real estate investments | 32,431 |  |  |
Accumulated Depreciation | 17,147 |  |  |
Total real estate investments, net | 15,284 |  |  |
Fixed rate mortgages | $ 21,805 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Ashburn Village, Ashburn, VA | Minimum |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Buildings and improvements depreciable lives in years | 5 years |  |  |
Shopping Centers | Ashburn Village, Ashburn, VA | Maximum |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Buildings and improvements depreciable lives in years | 10 years |  |  |
Shopping Centers | Ashland Square Phase I, Dumfries, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 1,178 |  |  |
Cost capitalized subsequent to acquisition | 7,508 |  |  |
Land and Land Improvements | 1,178 |  |  |
Buildings and Improvements, Gross | 7,508 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 8,686 |  |  |
Accumulated Depreciation | 3,255 |  |  |
Total real estate investments, net | 5,431 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Shopping Centers | Ashland Square Phase I, Dumfries, VA | Minimum |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Buildings and improvements depreciable lives in years | 20 years |  |  |
Shopping Centers | Ashland Square Phase I, Dumfries, VA | Maximum |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Shopping Centers | Beacon Center, Alexandria, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 24,161 |  |  |
Cost capitalized subsequent to acquisition | 18,514 |  |  |
Land and Land Improvements | 22,691 |  |  |
Buildings and Improvements, Gross | 19,984 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 42,675 |  |  |
Accumulated Depreciation | 17,210 |  |  |
Total real estate investments, net | 25,465 |  |  |
Fixed rate mortgages | $ 53,681 |  |  |
Shopping Centers | Beacon Center, Alexandria, VA | Minimum |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Beacon Center, Alexandria, VA | Maximum |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Shopping Centers | BJ’s Wholesale Club, Alexandria, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 22,623 |  |  |
Cost capitalized subsequent to acquisition | 0 |  |  |
Land and Land Improvements | 22,623 |  |  |
Buildings and Improvements, Gross | 0 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 22,623 |  |  |
Accumulated Depreciation | 0 |  |  |
Total real estate investments, net | 22,623 |  |  |
Fixed rate mortgages | $ 15,099 |  |  |
Buildings and improvements depreciable lives in years | 0 years |  |  |
Shopping Centers | Boca Valley Plaza, Boca Raton, FL |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 16,720 |  |  |
Cost capitalized subsequent to acquisition | 3,616 |  |  |
Land and Land Improvements | 5,735 |  |  |
Buildings and Improvements, Gross | 14,473 |  |  |
Construction in progress | 128 |  |  |
Real estate investments | 20,336 |  |  |
Accumulated Depreciation | 7,161 |  |  |
Total real estate investments, net | 13,175 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Boulevard, Fairfax, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 4,883 |  |  |
Cost capitalized subsequent to acquisition | 4,731 |  |  |
Land and Land Improvements | 3,687 |  |  |
Buildings and Improvements, Gross | 5,921 |  |  |
Construction in progress | 6 |  |  |
Real estate investments | 9,614 |  |  |
Accumulated Depreciation | 4,040 |  |  |
Total real estate investments, net | 5,574 |  |  |
Fixed rate mortgages | $ 9,358 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Briggs Chaney MarketPlace, Silver Spring, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 27,037 |  |  |
Cost capitalized subsequent to acquisition | 5,916 |  |  |
Land and Land Improvements | 9,789 |  |  |
Buildings and Improvements, Gross | 23,155 |  |  |
Construction in progress | 9 |  |  |
Real estate investments | 32,953 |  |  |
Accumulated Depreciation | 12,079 |  |  |
Total real estate investments, net | 20,874 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Broadlands Village, Ashburn, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 5,316 |  |  |
Cost capitalized subsequent to acquisition | 36,806 |  |  |
Land and Land Improvements | 5,300 |  |  |
Buildings and Improvements, Gross | 36,360 |  |  |
Construction in progress | 462 |  |  |
Real estate investments | 42,122 |  |  |
Accumulated Depreciation | 16,713 |  |  |
Total real estate investments, net | 25,409 |  |  |
Fixed rate mortgages | $ 27,999 |  |  |
Shopping Centers | Broadlands Village, Ashburn, VA | Minimum |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Broadlands Village, Ashburn, VA | Maximum |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Shopping Centers | Burtonsville Town Square, Burtonsville, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 74,212 |  |  |
Cost capitalized subsequent to acquisition | 6,357 |  |  |
Land and Land Improvements | 28,402 |  |  |
Buildings and Improvements, Gross | 52,149 |  |  |
Construction in progress | 18 |  |  |
Real estate investments | 80,569 |  |  |
Accumulated Depreciation | 9,935 |  |  |
Total real estate investments, net | 70,634 |  |  |
Fixed rate mortgages | $ 32,178 |  |  |
Shopping Centers | Burtonsville Town Square, Burtonsville, MD | Minimum |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Buildings and improvements depreciable lives in years | 20 years |  |  |
Shopping Centers | Burtonsville Town Square, Burtonsville, MD | Maximum |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Buildings and improvements depreciable lives in years | 45 years |  |  |
Shopping Centers | Countryside Marketplace, Sterling, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 28,912 |  |  |
Cost capitalized subsequent to acquisition | 5,134 |  |  |
Land and Land Improvements | 7,666 |  |  |
Buildings and Improvements, Gross | 26,181 |  |  |
Construction in progress | 199 |  |  |
Real estate investments | 34,046 |  |  |
Accumulated Depreciation | 13,764 |  |  |
Total real estate investments, net | 20,282 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Cranberry Square, Westminster, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 31,578 |  |  |
Cost capitalized subsequent to acquisition | 2,047 |  |  |
Land and Land Improvements | 6,700 |  |  |
Buildings and Improvements, Gross | 26,906 |  |  |
Construction in progress | 19 |  |  |
Real estate investments | 33,625 |  |  |
Accumulated Depreciation | 8,332 |  |  |
Total real estate investments, net | 25,293 |  |  |
Fixed rate mortgages | $ 13,224 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Cruse MarketPlace, Cumming, GA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 12,226 |  |  |
Cost capitalized subsequent to acquisition | 954 |  |  |
Land and Land Improvements | 3,901 |  |  |
Buildings and Improvements, Gross | 9,279 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 13,180 |  |  |
Accumulated Depreciation | 4,700 |  |  |
Total real estate investments, net | 8,480 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Flagship Center, Rockville, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 160 |  |  |
Cost capitalized subsequent to acquisition | 409 |  |  |
Land and Land Improvements | 169 |  |  |
Buildings and Improvements, Gross | 400 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 569 |  |  |
Accumulated Depreciation | 117 |  |  |
Total real estate investments, net | 452 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 0 years |  |  |
Shopping Centers | French Market, Oklahoma City, OK |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 5,781 |  |  |
Cost capitalized subsequent to acquisition | 17,689 |  |  |
Land and Land Improvements | 1,118 |  |  |
Buildings and Improvements, Gross | 21,450 |  |  |
Construction in progress | 902 |  |  |
Real estate investments | 23,470 |  |  |
Accumulated Depreciation | 15,159 |  |  |
Total real estate investments, net | 8,311 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Shopping Centers | Germantown, Germantown, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 2,034 |  |  |
Cost capitalized subsequent to acquisition | 566 |  |  |
Land and Land Improvements | 2,034 |  |  |
Buildings and Improvements, Gross | 566 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 2,600 |  |  |
Accumulated Depreciation | 489 |  |  |
Total real estate investments, net | 2,111 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | The Glen, Woodbridge, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 12,918 |  |  |
Cost capitalized subsequent to acquisition | 8,799 |  |  |
Land and Land Improvements | 5,300 |  |  |
Buildings and Improvements, Gross | 16,377 |  |  |
Construction in progress | 40 |  |  |
Real estate investments | 21,717 |  |  |
Accumulated Depreciation | 12,027 |  |  |
Total real estate investments, net | 9,690 |  |  |
Fixed rate mortgages | $ 20,234 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Great Falls Center, Great Falls, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 41,750 |  |  |
Cost capitalized subsequent to acquisition | 3,516 |  |  |
Land and Land Improvements | 14,766 |  |  |
Buildings and Improvements, Gross | 30,414 |  |  |
Construction in progress | 86 |  |  |
Real estate investments | 45,266 |  |  |
Accumulated Depreciation | 12,945 |  |  |
Total real estate investments, net | 32,321 |  |  |
Fixed rate mortgages | $ 30,547 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Hampshire Langley, Takoma, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 3,159 |  |  |
Cost capitalized subsequent to acquisition | 3,559 |  |  |
Land and Land Improvements | 1,892 |  |  |
Buildings and Improvements, Gross | 4,816 |  |  |
Construction in progress | 10 |  |  |
Real estate investments | 6,718 |  |  |
Accumulated Depreciation | 4,291 |  |  |
Total real estate investments, net | 2,427 |  |  |
Fixed rate mortgages | $ 11,569 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Hunt Club Corners, Apopka, FL |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 12,584 |  |  |
Cost capitalized subsequent to acquisition | 4,771 |  |  |
Land and Land Improvements | 4,822 |  |  |
Buildings and Improvements, Gross | 12,533 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 17,355 |  |  |
Accumulated Depreciation | 6,613 |  |  |
Total real estate investments, net | 10,742 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Jamestown Place, Altamonte Springs, FL |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 14,055 |  |  |
Cost capitalized subsequent to acquisition | 2,486 |  |  |
Land and Land Improvements | 4,455 |  |  |
Buildings and Improvements, Gross | 12,085 |  |  |
Construction in progress | 1 |  |  |
Real estate investments | 16,541 |  |  |
Accumulated Depreciation | 5,925 |  |  |
Total real estate investments, net | 10,616 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Kentlands Square I, Gaithersburg, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 14,379 |  |  |
Cost capitalized subsequent to acquisition | 3,730 |  |  |
Land and Land Improvements | 5,005 |  |  |
Buildings and Improvements, Gross | 13,104 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 18,109 |  |  |
Accumulated Depreciation | 5,561 |  |  |
Total real estate investments, net | 12,548 |  |  |
Fixed rate mortgages | $ 18,840 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Kentlands Square II, Gaithersburg, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 76,723 |  |  |
Cost capitalized subsequent to acquisition | 3,555 |  |  |
Land and Land Improvements | 23,133 |  |  |
Buildings and Improvements, Gross | 56,860 |  |  |
Construction in progress | 285 |  |  |
Real estate investments | 80,278 |  |  |
Accumulated Depreciation | 19,561 |  |  |
Total real estate investments, net | 60,717 |  |  |
Fixed rate mortgages | $ 30,168 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Kentlands Place, Gaithersburg, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 1,425 |  |  |
Cost capitalized subsequent to acquisition | 7,944 |  |  |
Land and Land Improvements | 1,425 |  |  |
Buildings and Improvements, Gross | 7,700 |  |  |
Construction in progress | 244 |  |  |
Real estate investments | 9,369 |  |  |
Accumulated Depreciation | 4,951 |  |  |
Total real estate investments, net | 4,418 |  |  |
Fixed rate mortgages | $ 6,406 |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Shopping Centers | Lansdowne Town Center, Leesburg, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 6,545 |  |  |
Cost capitalized subsequent to acquisition | 43,903 |  |  |
Land and Land Improvements | 6,546 |  |  |
Buildings and Improvements, Gross | 43,593 |  |  |
Construction in progress | 309 |  |  |
Real estate investments | 50,448 |  |  |
Accumulated Depreciation | 21,009 |  |  |
Total real estate investments, net | 29,439 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Shopping Centers | Leesburg Pike Plaza, Baileys Crossroads, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 2,418 |  |  |
Cost capitalized subsequent to acquisition | 7,012 |  |  |
Land and Land Improvements | 1,132 |  |  |
Buildings and Improvements, Gross | 8,195 |  |  |
Construction in progress | 103 |  |  |
Real estate investments | 9,430 |  |  |
Accumulated Depreciation | 6,523 |  |  |
Total real estate investments, net | 2,907 |  |  |
Fixed rate mortgages | $ 11,822 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Lumberton Plaza, Lumberton, NJ |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 4,400 |  |  |
Cost capitalized subsequent to acquisition | 11,792 |  |  |
Land and Land Improvements | 950 |  |  |
Buildings and Improvements, Gross | 15,161 |  |  |
Construction in progress | 81 |  |  |
Real estate investments | 16,192 |  |  |
Accumulated Depreciation | 14,170 |  |  |
Total real estate investments, net | 2,022 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Metro Pike Center, Rockville, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 33,123 |  |  |
Cost capitalized subsequent to acquisition | 5,454 |  |  |
Land and Land Improvements | 26,064 |  |  |
Buildings and Improvements, Gross | 8,470 |  |  |
Construction in progress | 4,043 |  |  |
Real estate investments | 38,577 |  |  |
Accumulated Depreciation | 2,903 |  |  |
Total real estate investments, net | 35,674 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Shops at Monocacy, Frederick, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 9,541 |  |  |
Cost capitalized subsequent to acquisition | 16,070 |  |  |
Land and Land Improvements | 9,260 |  |  |
Buildings and Improvements, Gross | 16,351 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 25,611 |  |  |
Accumulated Depreciation | 7,680 |  |  |
Total real estate investments, net | 17,931 |  |  |
Fixed rate mortgages | $ 25,670 |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Shopping Centers | Northrock, Warrenton, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 12,686 |  |  |
Cost capitalized subsequent to acquisition | 15,430 |  |  |
Land and Land Improvements | 12,686 |  |  |
Buildings and Improvements, Gross | 15,422 |  |  |
Construction in progress | 8 |  |  |
Real estate investments | 28,116 |  |  |
Accumulated Depreciation | 6,734 |  |  |
Total real estate investments, net | 21,382 |  |  |
Fixed rate mortgages | $ 12,135 |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Shopping Centers | Olde Forte Village, Ft. Washington, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 15,933 |  |  |
Cost capitalized subsequent to acquisition | 6,979 |  |  |
Land and Land Improvements | 5,409 |  |  |
Buildings and Improvements, Gross | 17,468 |  |  |
Construction in progress | 35 |  |  |
Real estate investments | 22,912 |  |  |
Accumulated Depreciation | 9,995 |  |  |
Total real estate investments, net | 12,917 |  |  |
Fixed rate mortgages | $ 19,563 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Olney, Olney, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 4,963 |  |  |
Cost capitalized subsequent to acquisition | 3,026 |  |  |
Land and Land Improvements | 3,079 |  |  |
Buildings and Improvements, Gross | 4,910 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 7,989 |  |  |
Accumulated Depreciation | 3,744 |  |  |
Total real estate investments, net | 4,245 |  |  |
Fixed rate mortgages | $ 12,655 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Orchard Park, Dunwoody, GA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 19,377 |  |  |
Cost capitalized subsequent to acquisition | 1,642 |  |  |
Land and Land Improvements | 7,751 |  |  |
Buildings and Improvements, Gross | 13,242 |  |  |
Construction in progress | 26 |  |  |
Real estate investments | 21,019 |  |  |
Accumulated Depreciation | 5,692 |  |  |
Total real estate investments, net | 15,327 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Palm Springs Center, Altamonte Springs, FL |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 18,365 |  |  |
Cost capitalized subsequent to acquisition | 2,534 |  |  |
Land and Land Improvements | 5,739 |  |  |
Buildings and Improvements, Gross | 14,665 |  |  |
Construction in progress | 495 |  |  |
Real estate investments | 20,899 |  |  |
Accumulated Depreciation | 7,371 |  |  |
Total real estate investments, net | 13,528 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Ravenwood, Baltimore, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 1,245 |  |  |
Cost capitalized subsequent to acquisition | 4,486 |  |  |
Land and Land Improvements | 703 |  |  |
Buildings and Improvements, Gross | 5,028 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 5,731 |  |  |
Accumulated Depreciation | 3,717 |  |  |
Total real estate investments, net | 2,014 |  |  |
Fixed rate mortgages | $ 11,361 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | 11503 Rockville Pike/5541 Nicholson Lane, Rockville, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 26,561 |  |  |
Cost capitalized subsequent to acquisition | 24 |  |  |
Land and Land Improvements | 22,113 |  |  |
Buildings and Improvements, Gross | 4,472 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 26,585 |  |  |
Accumulated Depreciation | 1,488 |  |  |
Total real estate investments, net | 25,097 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | 1500/1580/1582 Rockville Pike, Rockville, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 45,351 |  |  |
Cost capitalized subsequent to acquisition | 2,046 |  |  |
Land and Land Improvements | 38,065 |  |  |
Buildings and Improvements, Gross | 7,050 |  |  |
Construction in progress | 2,282 |  |  |
Real estate investments | 47,397 |  |  |
Accumulated Depreciation | 6,950 |  |  |
Total real estate investments, net | 40,447 |  |  |
Fixed rate mortgages | 0 |  |  |
Shopping Centers | Seabreeze Plaza, Palm Harbor, FL |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | 24,526 |  |  |
Cost capitalized subsequent to acquisition | 3,553 |  |  |
Land and Land Improvements | 8,665 |  |  |
Buildings and Improvements, Gross | 18,943 |  |  |
Construction in progress | 471 |  |  |
Real estate investments | 28,079 |  |  |
Accumulated Depreciation | 8,991 |  |  |
Total real estate investments, net | 19,088 |  |  |
Fixed rate mortgages | $ 12,683 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Market Place at Sea Colony, Bethany Beach, DE |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 2,920 |  |  |
Cost capitalized subsequent to acquisition | 339 |  |  |
Land and Land Improvements | 1,147 |  |  |
Buildings and Improvements, Gross | 2,112 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 3,259 |  |  |
Accumulated Depreciation | 858 |  |  |
Total real estate investments, net | 2,401 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Seven Corners, Falls Church, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 4,848 |  |  |
Cost capitalized subsequent to acquisition | 46,536 |  |  |
Land and Land Improvements | 4,929 |  |  |
Buildings and Improvements, Gross | 46,450 |  |  |
Construction in progress | 5 |  |  |
Real estate investments | 51,384 |  |  |
Accumulated Depreciation | 35,402 |  |  |
Total real estate investments, net | 15,982 |  |  |
Fixed rate mortgages | $ 85,889 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Severna Park Marketplace, Severna Park, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 63,254 |  |  |
Cost capitalized subsequent to acquisition | 3,588 |  |  |
Land and Land Improvements | 12,700 |  |  |
Buildings and Improvements, Gross | 54,035 |  |  |
Construction in progress | 107 |  |  |
Real estate investments | 66,842 |  |  |
Accumulated Depreciation | 15,930 |  |  |
Total real estate investments, net | 50,912 |  |  |
Fixed rate mortgages | $ 24,458 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Shops at Fairfax, Fairfax, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 2,708 |  |  |
Cost capitalized subsequent to acquisition | 11,109 |  |  |
Land and Land Improvements | 992 |  |  |
Buildings and Improvements, Gross | 12,825 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 13,817 |  |  |
Accumulated Depreciation | 9,787 |  |  |
Total real estate investments, net | 4,030 |  |  |
Fixed rate mortgages | $ 13,094 |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Shopping Centers | Smallwood Village Center, Waldorf, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 17,819 |  |  |
Cost capitalized subsequent to acquisition | 8,915 |  |  |
Land and Land Improvements | 6,402 |  |  |
Buildings and Improvements, Gross | 20,143 |  |  |
Construction in progress | 189 |  |  |
Real estate investments | 26,734 |  |  |
Accumulated Depreciation | 11,922 |  |  |
Total real estate investments, net | 14,812 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Southdale, Glen Burnie, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 18,895 |  |  |
Cost capitalized subsequent to acquisition | 26,767 |  |  |
Land and Land Improvements | 15,255 |  |  |
Buildings and Improvements, Gross | 29,318 |  |  |
Construction in progress | 1,089 |  |  |
Real estate investments | 45,662 |  |  |
Accumulated Depreciation | 24,607 |  |  |
Total real estate investments, net | 21,055 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Southside Plaza, Richmond, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 6,728 |  |  |
Cost capitalized subsequent to acquisition | 12,284 |  |  |
Land and Land Improvements | 1,878 |  |  |
Buildings and Improvements, Gross | 17,134 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 19,012 |  |  |
Accumulated Depreciation | 14,019 |  |  |
Total real estate investments, net | 4,993 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | South Dekalb Plaza, Atlanta, GA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 2,474 |  |  |
Cost capitalized subsequent to acquisition | 5,111 |  |  |
Land and Land Improvements | 615 |  |  |
Buildings and Improvements, Gross | 6,901 |  |  |
Construction in progress | 69 |  |  |
Real estate investments | 7,585 |  |  |
Accumulated Depreciation | 5,601 |  |  |
Total real estate investments, net | 1,984 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Thruway, Winston-Salem, NC |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 7,848 |  |  |
Cost capitalized subsequent to acquisition | 31,346 |  |  |
Land and Land Improvements | 7,692 |  |  |
Buildings and Improvements, Gross | 29,867 |  |  |
Construction in progress | 1,635 |  |  |
Real estate investments | 39,194 |  |  |
Accumulated Depreciation | 21,721 |  |  |
Total real estate investments, net | 17,473 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Village Center, Centreville, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 16,502 |  |  |
Cost capitalized subsequent to acquisition | 3,486 |  |  |
Land and Land Improvements | 7,851 |  |  |
Buildings and Improvements, Gross | 12,137 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 19,988 |  |  |
Accumulated Depreciation | 8,866 |  |  |
Total real estate investments, net | 11,122 |  |  |
Fixed rate mortgages | $ 24,460 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Westview Village, Frederick, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 6,047 |  |  |
Cost capitalized subsequent to acquisition | 25,754 |  |  |
Land and Land Improvements | 6,047 |  |  |
Buildings and Improvements, Gross | 25,725 |  |  |
Construction in progress | 29 |  |  |
Real estate investments | 31,801 |  |  |
Accumulated Depreciation | 12,949 |  |  |
Total real estate investments, net | 18,852 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Shopping Centers | White Oak, Silver Spring, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 6,277 |  |  |
Cost capitalized subsequent to acquisition | 7,110 |  |  |
Land and Land Improvements | 4,649 |  |  |
Buildings and Improvements, Gross | 8,512 |  |  |
Construction in progress | 226 |  |  |
Real estate investments | 13,387 |  |  |
Accumulated Depreciation | 6,821 |  |  |
Total real estate investments, net | 6,566 |  |  |
Fixed rate mortgages | $ 19,031 |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Shopping Centers | Other Buildings / Improvements |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Cost capitalized subsequent to acquisition | $ 182 |  |  |
Buildings and Improvements, Gross | 182 |  |  |
Construction in progress |  |  |  |
Real estate investments | 182 |  |  |
Accumulated Depreciation | 178 |  |  |
Total real estate investments, net | 4 |  |  |
Fixed rate mortgages | 0 |  |  |
Mixed-Use Properties |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | 96,034 |  |  |
Cost capitalized subsequent to acquisition | 679,679 |  |  |
Land and Land Improvements | 82,114 |  |  |
Buildings and Improvements, Gross | 691,759 |  |  |
Construction in progress | 1,840 |  |  |
Real estate investments | 775,713 |  |  |
Accumulated Depreciation | 249,122 |  |  |
Total real estate investments, net | 526,591 |  |  |
Fixed rate mortgages | 363,505 |  |  |
Mixed-Use Properties | Avenel Business Park, Gaithersburg, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | 21,459 |  |  |
Cost capitalized subsequent to acquisition | 37,762 |  |  |
Land and Land Improvements | 3,756 |  |  |
Buildings and Improvements, Gross | 55,385 |  |  |
Construction in progress | 80 |  |  |
Real estate investments | 59,221 |  |  |
Accumulated Depreciation | 43,412 |  |  |
Total real estate investments, net | 15,809 |  |  |
Fixed rate mortgages | $ 21,611 |  |  |
Mixed-Use Properties | Avenel Business Park, Gaithersburg, MD | Minimum |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Buildings and improvements depreciable lives in years | 35 years |  |  |
Mixed-Use Properties | Avenel Business Park, Gaithersburg, MD | Maximum |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Buildings and improvements depreciable lives in years | 40 years |  |  |
Mixed-Use Properties | Clarendon Center, Arlington, VA (1) |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 12,753 |  |  |
Cost capitalized subsequent to acquisition | 188,640 |  |  |
Land and Land Improvements | 16,287 |  |  |
Buildings and Improvements, Gross | 184,486 |  |  |
Construction in progress | 620 |  |  |
Real estate investments | 201,393 |  |  |
Accumulated Depreciation | 65,111 |  |  |
Total real estate investments, net | 136,282 |  |  |
Fixed rate mortgages | $ 81,693 |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Mixed-Use Properties | Park Van Ness, Washington, DC |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 2,242 |  |  |
Cost capitalized subsequent to acquisition | 91,960 |  |  |
Land and Land Improvements | 2,242 |  |  |
Buildings and Improvements, Gross | 91,775 |  |  |
Construction in progress | 185 |  |  |
Real estate investments | 94,202 |  |  |
Accumulated Depreciation | 20,370 |  |  |
Total real estate investments, net | 73,832 |  |  |
Fixed rate mortgages | $ 60,874 |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Mixed-Use Properties | 601 Pennsylvania Ave., Washington, DC |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 5,479 |  |  |
Cost capitalized subsequent to acquisition | 71,722 |  |  |
Land and Land Improvements | 5,667 |  |  |
Buildings and Improvements, Gross | 71,041 |  |  |
Construction in progress | 493 |  |  |
Real estate investments | 77,201 |  |  |
Accumulated Depreciation | 60,634 |  |  |
Total real estate investments, net | 16,567 |  |  |
Fixed rate mortgages | $ 0 |  |  |
Buildings and improvements depreciable lives in years | 35 years |  |  |
Mixed-Use Properties | The Waycroft, Arlington, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 52,067 |  |  |
Cost capitalized subsequent to acquisition | 228,794 |  |  |
Land and Land Improvements | 53,618 |  |  |
Buildings and Improvements, Gross | 227,243 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 280,861 |  |  |
Accumulated Depreciation | 25,188 |  |  |
Total real estate investments, net | 255,673 |  |  |
Fixed rate mortgages | $ 149,078 |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Mixed-Use Properties | Washington Square, Alexandria, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 2,034 |  |  |
Cost capitalized subsequent to acquisition | 60,801 |  |  |
Land and Land Improvements | 544 |  |  |
Buildings and Improvements, Gross | 61,829 |  |  |
Construction in progress | 462 |  |  |
Real estate investments | 62,835 |  |  |
Accumulated Depreciation | 34,407 |  |  |
Total real estate investments, net | 28,428 |  |  |
Fixed rate mortgages | $ 50,249 |  |  |
Buildings and improvements depreciable lives in years | 50 years |  |  |
Development Land |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | $ 157,042 |  |  |
Cost capitalized subsequent to acquisition | 351,285 |  |  |
Land and Land Improvements | 9,283 |  |  |
Buildings and Improvements, Gross | 0 |  |  |
Construction in progress | 499,044 |  |  |
Real estate investments | 508,327 |  |  |
Accumulated Depreciation | 0 |  |  |
Total real estate investments, net | 508,327 |  |  |
Development land, related debt | 82,635 |  |  |
Development Land | Ashland Square Phase II, Manassas, VA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | 5,292 |  |  |
Cost capitalized subsequent to acquisition | 3,448 |  |  |
Land and Land Improvements | 7,049 |  |  |
Buildings and Improvements, Gross | 0 |  |  |
Construction in progress | 1,691 |  |  |
Real estate investments | 8,740 |  |  |
Accumulated Depreciation | 0 |  |  |
Total real estate investments, net | 8,740 |  |  |
Development land, related debt | 0 |  |  |
Development Land | New Market, New Market, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | 2,088 |  |  |
Cost capitalized subsequent to acquisition | 146 |  |  |
Land and Land Improvements | 2,234 |  |  |
Buildings and Improvements, Gross | 0 |  |  |
Construction in progress | 0 |  |  |
Real estate investments | 2,234 |  |  |
Accumulated Depreciation | 0 |  |  |
Total real estate investments, net | 2,234 |  |  |
Development land, related debt | 0 |  |  |
Development Land | Hampden House, Bethesda, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | 39,641 |  |  |
Cost capitalized subsequent to acquisition | 102,599 |  |  |
Land and Land Improvements | 0 |  |  |
Buildings and Improvements, Gross | 0 |  |  |
Construction in progress | 142,240 |  |  |
Real estate investments | 142,240 |  |  |
Accumulated Depreciation | 0 |  |  |
Total real estate investments, net | 142,240 |  |  |
Development land, related debt | 7,726 |  |  |
Development Land | Twinbrook, Rockville, MD |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Initial Basis | 110,021 |  |  |
Cost capitalized subsequent to acquisition | 245,092 |  |  |
Land and Land Improvements | 0 |  |  |
Buildings and Improvements, Gross | 0 |  |  |
Construction in progress | 355,113 |  |  |
Real estate investments | 355,113 |  |  |
Accumulated Depreciation | 0 |  |  |
Total real estate investments, net | 355,113 |  |  |
Development land, related debt | $ 74,909 |  |  |

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