Schedule III Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 94,155
Initial cost of land	1,084,253
Initial cost of buildings and improvements	3,266,098
Adjustments to basis	329,413
Gross amount carried at end of period, land and improvements	1,087,148
Gross amount carried at end of period, buildings and improvements	3,592,616
Gross amount carried at end of period, total	4,679,764	$ 4,692,754	$ 4,785,927	$ 5,499,506
Accumulated depreciation	1,383,274	$ 1,313,602	$ 1,215,990	$ 1,443,333
Aggregate cost of real estate, U.S. federal income tax purposes	4,690,491
Ashland & Roosevelt | Chicago, IL
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	439
Initial cost of land	13,850
Initial cost of buildings and improvements	21,052
Adjustments to basis	1,277
Gross amount carried at end of period, land and improvements	13,850
Gross amount carried at end of period, buildings and improvements	22,329
Gross amount carried at end of period, total	36,179
Accumulated depreciation	11,630
Avondale Plaza | Redmond, WA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,573
Initial cost of buildings and improvements	9,497
Adjustments to basis	74
Gross amount carried at end of period, land and improvements	4,573
Gross amount carried at end of period, buildings and improvements	9,571
Gross amount carried at end of period, total	14,144
Accumulated depreciation	1,890
Bed Bath & Beyond Plaza | Westbury, NY
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,530
Initial cost of buildings and improvements	11,901
Adjustments to basis	405
Gross amount carried at end of period, land and improvements	4,530
Gross amount carried at end of period, buildings and improvements	12,306
Gross amount carried at end of period, total	16,836
Accumulated depreciation	6,355
The Brickyard | Chicago, IL
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	45,300
Initial cost of buildings and improvements	26,657
Adjustments to basis	8,870
Gross amount carried at end of period, land and improvements	45,300
Gross amount carried at end of period, buildings and improvements	35,527
Gross amount carried at end of period, total	80,827
Accumulated depreciation	18,094
Carillon | Largo, MD
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	15,261
Initial cost of buildings and improvements	114,703
Adjustments to basis	(109,424)
Gross amount carried at end of period, land and improvements	2,811
Gross amount carried at end of period, buildings and improvements	17,729
Gross amount carried at end of period, total	20,540
Accumulated depreciation	8,263
Cedar Park Town Center | Cedar Park, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	23,923
Initial cost of buildings and improvements	13,829
Adjustments to basis	251
Gross amount carried at end of period, land and improvements	23,923
Gross amount carried at end of period, buildings and improvements	14,080
Gross amount carried at end of period, total	38,003
Accumulated depreciation	3,286
Central Texas Marketplace | Waco, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	13,000
Initial cost of buildings and improvements	47,559
Adjustments to basis	11,122
Gross amount carried at end of period, land and improvements	13,000
Gross amount carried at end of period, buildings and improvements	58,681
Gross amount carried at end of period, total	71,681
Accumulated depreciation	26,896
Centre at Laurel | Laurel, MD
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	19,000
Initial cost of buildings and improvements	8,406
Adjustments to basis	17,479
Gross amount carried at end of period, land and improvements	18,700
Gross amount carried at end of period, buildings and improvements	26,185
Gross amount carried at end of period, total	44,885
Accumulated depreciation	12,808
Chantilly Crossing | Chantilly, VA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	8,500
Initial cost of buildings and improvements	16,060
Adjustments to basis	2,560
Gross amount carried at end of period, land and improvements	8,500
Gross amount carried at end of period, buildings and improvements	18,620
Gross amount carried at end of period, total	27,120
Accumulated depreciation	9,765
Circle East | Towson, MD
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	9,050
Initial cost of buildings and improvements	17,840
Adjustments to basis	(26,484)
Gross amount carried at end of period, land and improvements	0
Gross amount carried at end of period, buildings and improvements	406
Gross amount carried at end of period, total	406
Accumulated depreciation	55
Clearlake Shores | Clear Lake, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,775
Initial cost of buildings and improvements	7,026
Adjustments to basis	1,363
Gross amount carried at end of period, land and improvements	1,775
Gross amount carried at end of period, buildings and improvements	8,389
Gross amount carried at end of period, total	10,164
Accumulated depreciation	4,377
Coal Creek Marketplace | New Castle, WA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,023
Initial cost of buildings and improvements	12,382
Adjustments to basis	261
Gross amount carried at end of period, land and improvements	5,023
Gross amount carried at end of period, buildings and improvements	12,643
Gross amount carried at end of period, total	17,666
Accumulated depreciation	2,095
Colony Square | Sugar Land, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	16,700
Initial cost of buildings and improvements	22,775
Adjustments to basis	7,781
Gross amount carried at end of period, land and improvements	16,700
Gross amount carried at end of period, buildings and improvements	30,556
Gross amount carried at end of period, total	47,256
Accumulated depreciation	13,605
The Commons at Temecula | Temecula, CA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,000
Initial cost of buildings and improvements	35,887
Adjustments to basis	7,145
Gross amount carried at end of period, land and improvements	12,000
Gross amount carried at end of period, buildings and improvements	43,032
Gross amount carried at end of period, total	55,032
Accumulated depreciation	22,053
Coppell Town Center | Coppell, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,919
Initial cost of buildings and improvements	13,281
Adjustments to basis	330
Gross amount carried at end of period, land and improvements	2,919
Gross amount carried at end of period, buildings and improvements	13,611
Gross amount carried at end of period, total	16,530
Accumulated depreciation	3,342
Coram Plaza | Coram, NY
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	10,200
Initial cost of buildings and improvements	26,178
Adjustments to basis	3,900
Gross amount carried at end of period, land and improvements	10,200
Gross amount carried at end of period, buildings and improvements	30,078
Gross amount carried at end of period, total	40,278
Accumulated depreciation	16,391
Cypress Mill Plaza | Cypress, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,962
Initial cost of buildings and improvements	9,976
Adjustments to basis	178
Gross amount carried at end of period, land and improvements	4,962
Gross amount carried at end of period, buildings and improvements	10,154
Gross amount carried at end of period, total	15,116
Accumulated depreciation	2,677
Davis Towne Crossing | North Richland Hills, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,850
Initial cost of buildings and improvements	5,681
Adjustments to basis	1,210
Gross amount carried at end of period, land and improvements	1,671
Gross amount carried at end of period, buildings and improvements	7,070
Gross amount carried at end of period, total	8,741
Accumulated depreciation	3,905
Denton Crossing | Denton, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	6,000
Initial cost of buildings and improvements	43,434
Adjustments to basis	17,093
Gross amount carried at end of period, land and improvements	6,000
Gross amount carried at end of period, buildings and improvements	60,527
Gross amount carried at end of period, total	66,527
Accumulated depreciation	31,246
Downtown Crown | Gaithersburg, MD
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	43,367
Initial cost of buildings and improvements	110,785
Adjustments to basis	5,073
Gross amount carried at end of period, land and improvements	43,367
Gross amount carried at end of period, buildings and improvements	115,858
Gross amount carried at end of period, total	159,225
Accumulated depreciation	21,752
East Stone Commons | Kingsport, TN
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,900
Initial cost of buildings and improvements	28,714
Adjustments to basis	338
Gross amount carried at end of period, land and improvements	2,826
Gross amount carried at end of period, buildings and improvements	29,126
Gross amount carried at end of period, total	31,952
Accumulated depreciation	14,338
Eastside | Richardson, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,055
Initial cost of buildings and improvements	17,620
Adjustments to basis	87
Gross amount carried at end of period, land and improvements	4,055
Gross amount carried at end of period, buildings and improvements	17,707
Gross amount carried at end of period, total	21,762
Accumulated depreciation	2,582
Eastwood Towne Center | Lansing, MI
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,000
Initial cost of buildings and improvements	65,067
Adjustments to basis	9,765
Gross amount carried at end of period, land and improvements	12,000
Gross amount carried at end of period, buildings and improvements	74,832
Gross amount carried at end of period, total	86,832
Accumulated depreciation	39,860
Edwards Multiplex | Ontario, CA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	11,800
Initial cost of buildings and improvements	33,098
Adjustments to basis	0
Gross amount carried at end of period, land and improvements	11,800
Gross amount carried at end of period, buildings and improvements	33,098
Gross amount carried at end of period, total	44,898
Accumulated depreciation	17,797
Fairgrounds Plaza | Middletown, NY
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,800
Initial cost of buildings and improvements	13,490
Adjustments to basis	5,082
Gross amount carried at end of period, land and improvements	5,431
Gross amount carried at end of period, buildings and improvements	17,941
Gross amount carried at end of period, total	23,372
Accumulated depreciation	9,338
Fordham Place | Bronx, NY
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	17,209
Initial cost of buildings and improvements	96,547
Adjustments to basis	328
Gross amount carried at end of period, land and improvements	17,209
Gross amount carried at end of period, buildings and improvements	96,875
Gross amount carried at end of period, total	114,084
Accumulated depreciation	21,263
Fort Evans Plaza II | Leesburg, VA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	16,118
Initial cost of buildings and improvements	44,880
Adjustments to basis	407
Gross amount carried at end of period, land and improvements	16,118
Gross amount carried at end of period, buildings and improvements	45,287
Gross amount carried at end of period, total	61,405
Accumulated depreciation	9,194
Fullerton Metrocenter | Fullerton, CA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	0
Initial cost of buildings and improvements	47,403
Adjustments to basis	3,643
Gross amount carried at end of period, land and improvements	0
Gross amount carried at end of period, buildings and improvements	51,046
Gross amount carried at end of period, total	51,046
Accumulated depreciation	28,723
Galvez Shopping Center | Galveston, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,250
Initial cost of buildings and improvements	4,947
Adjustments to basis	442
Gross amount carried at end of period, land and improvements	1,250
Gross amount carried at end of period, buildings and improvements	5,389
Gross amount carried at end of period, total	6,639
Accumulated depreciation	2,838
Gardiner Manor Mall | Bay Shore, NY
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,348
Initial cost of buildings and improvements	56,199
Adjustments to basis	1,941
Gross amount carried at end of period, land and improvements	12,348
Gross amount carried at end of period, buildings and improvements	58,140
Gross amount carried at end of period, total	70,488
Accumulated depreciation	11,944
Gateway Pavilions | Avondale, AZ
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	9,880
Initial cost of buildings and improvements	55,195
Adjustments to basis	5,090
Gross amount carried at end of period, land and improvements	9,880
Gross amount carried at end of period, buildings and improvements	60,285
Gross amount carried at end of period, total	70,165
Accumulated depreciation	31,744
Gateway Plaza | Southlake, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	0
Initial cost of buildings and improvements	26,371
Adjustments to basis	5,599
Gross amount carried at end of period, land and improvements	0
Gross amount carried at end of period, buildings and improvements	31,970
Gross amount carried at end of period, total	31,970
Accumulated depreciation	17,077
Gateway Station | College Station, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,050
Initial cost of buildings and improvements	3,911
Adjustments to basis	1,333
Gross amount carried at end of period, land and improvements	1,050
Gross amount carried at end of period, buildings and improvements	5,244
Gross amount carried at end of period, total	6,294
Accumulated depreciation	2,761
Gateway Station II & III | College Station, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,280
Initial cost of buildings and improvements	11,557
Adjustments to basis	371
Gross amount carried at end of period, land and improvements	3,280
Gross amount carried at end of period, buildings and improvements	11,928
Gross amount carried at end of period, total	15,208
Accumulated depreciation	5,301
Gateway Village | Annapolis, MD
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	32,580
Initial cost of land	8,550
Initial cost of buildings and improvements	39,298
Adjustments to basis	6,753
Gross amount carried at end of period, land and improvements	8,550
Gross amount carried at end of period, buildings and improvements	46,051
Gross amount carried at end of period, total	54,601
Accumulated depreciation	24,933
Gerry Centennial Plaza | Oswego, IL
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,370
Initial cost of buildings and improvements	12,968
Adjustments to basis	10,137
Gross amount carried at end of period, land and improvements	5,370
Gross amount carried at end of period, buildings and improvements	23,105
Gross amount carried at end of period, total	28,475
Accumulated depreciation	10,214
Grapevine Crossing | Grapevine, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,100
Initial cost of buildings and improvements	16,938
Adjustments to basis	492
Gross amount carried at end of period, land and improvements	3,894
Gross amount carried at end of period, buildings and improvements	17,636
Gross amount carried at end of period, total	21,530
Accumulated depreciation	9,371
Green's Corner | Cumming, GA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,200
Initial cost of buildings and improvements	8,663
Adjustments to basis	1,468
Gross amount carried at end of period, land and improvements	3,200
Gross amount carried at end of period, buildings and improvements	10,131
Gross amount carried at end of period, total	13,331
Accumulated depreciation	5,187
Gurnee Town Center | Gurnee, IL
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	7,000
Initial cost of buildings and improvements	35,147
Adjustments to basis	6,828
Gross amount carried at end of period, land and improvements	7,000
Gross amount carried at end of period, buildings and improvements	41,975
Gross amount carried at end of period, total	48,975
Accumulated depreciation	22,023
Henry Town Center | McDonough, GA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	10,650
Initial cost of buildings and improvements	46,814
Adjustments to basis	9,419
Gross amount carried at end of period, land and improvements	10,650
Gross amount carried at end of period, buildings and improvements	56,233
Gross amount carried at end of period, total	66,883
Accumulated depreciation	28,361
Heritage Square | Issaquah, WA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	6,377
Initial cost of buildings and improvements	11,385
Adjustments to basis	2,393
Gross amount carried at end of period, land and improvements	6,377
Gross amount carried at end of period, buildings and improvements	13,778
Gross amount carried at end of period, total	20,155
Accumulated depreciation	3,036
Heritage Towne Crossing | Euless, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,065
Initial cost of buildings and improvements	10,729
Adjustments to basis	1,757
Gross amount carried at end of period, land and improvements	3,065
Gross amount carried at end of period, buildings and improvements	12,486
Gross amount carried at end of period, total	15,551
Accumulated depreciation	7,121
Home Depot Center | Pittsburgh, PA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	0
Initial cost of buildings and improvements	16,758
Adjustments to basis	0
Gross amount carried at end of period, land and improvements	0
Gross amount carried at end of period, buildings and improvements	16,758
Gross amount carried at end of period, total	16,758
Accumulated depreciation	8,908
HQ Building | San Antonio, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,200
Initial cost of buildings and improvements	10,010
Adjustments to basis	4,406
Gross amount carried at end of period, land and improvements	5,200
Gross amount carried at end of period, buildings and improvements	14,416
Gross amount carried at end of period, total	19,616
Accumulated depreciation	7,785
Huebner Oaks Center | San Antonio, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	18,087
Initial cost of buildings and improvements	64,731
Adjustments to basis	3,107
Gross amount carried at end of period, land and improvements	18,087
Gross amount carried at end of period, buildings and improvements	67,838
Gross amount carried at end of period, total	85,925
Accumulated depreciation	13,495
Humblewood Shopping Center | Humble, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,200
Initial cost of buildings and improvements	12,823
Adjustments to basis	1,244
Gross amount carried at end of period, land and improvements	2,200
Gross amount carried at end of period, buildings and improvements	14,067
Gross amount carried at end of period, total	16,267
Accumulated depreciation	7,039
Jefferson Commons | Newport News, VA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	23,097
Initial cost of buildings and improvements	52,762
Adjustments to basis	3,791
Gross amount carried at end of period, land and improvements	23,097
Gross amount carried at end of period, buildings and improvements	56,553
Gross amount carried at end of period, total	79,650
Accumulated depreciation	24,281
John's Creek Village | John's Creek, GA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	14,446
Initial cost of buildings and improvements	23,932
Adjustments to basis	1,278
Gross amount carried at end of period, land and improvements	14,295
Gross amount carried at end of period, buildings and improvements	25,361
Gross amount carried at end of period, total	39,656
Accumulated depreciation	5,526
King Philip's Crossing | Seekonk, MA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,710
Initial cost of buildings and improvements	19,144
Adjustments to basis	(11,171)
Gross amount carried at end of period, land and improvements	3,388
Gross amount carried at end of period, buildings and improvements	8,295
Gross amount carried at end of period, total	11,683
Accumulated depreciation	0
La Plaza Del Norte | San Antonio, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	16,005
Initial cost of buildings and improvements	37,744
Adjustments to basis	5,404
Gross amount carried at end of period, land and improvements	16,005
Gross amount carried at end of period, buildings and improvements	43,148
Gross amount carried at end of period, total	59,153
Accumulated depreciation	24,321
Lake Worth Towne Crossing | Lake Worth, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	6,600
Initial cost of buildings and improvements	30,910
Adjustments to basis	9,357
Gross amount carried at end of period, land and improvements	6,600
Gross amount carried at end of period, buildings and improvements	40,267
Gross amount carried at end of period, total	46,867
Accumulated depreciation	18,947
Lakewood Towne Center | Lakewood, WA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,555
Initial cost of buildings and improvements	74,612
Adjustments to basis	(8,038)
Gross amount carried at end of period, land and improvements	12,555
Gross amount carried at end of period, buildings and improvements	66,574
Gross amount carried at end of period, total	79,129
Accumulated depreciation	34,695
Lincoln Park | Dallas, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	38,329
Initial cost of buildings and improvements	17,772
Adjustments to basis	733
Gross amount carried at end of period, land and improvements	38,329
Gross amount carried at end of period, buildings and improvements	18,505
Gross amount carried at end of period, total	56,834
Accumulated depreciation	3,957
Lincoln Plaza | Worcester, MA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	13,000
Initial cost of buildings and improvements	46,482
Adjustments to basis	23,209
Gross amount carried at end of period, land and improvements	13,110
Gross amount carried at end of period, buildings and improvements	69,581
Gross amount carried at end of period, total	82,691
Accumulated depreciation	35,147
Lowe's/Bed Bath Beyond | Butler, NJ
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	7,423
Initial cost of buildings and improvements	799
Adjustments to basis	(8)
Gross amount carried at end of period, land and improvements	7,415
Gross amount carried at end of period, buildings and improvements	799
Gross amount carried at end of period, total	8,214
Accumulated depreciation	763
MacArthur Crossing | Los Colinas, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,710
Initial cost of buildings and improvements	16,265
Adjustments to basis	2,691
Gross amount carried at end of period, land and improvements	4,710
Gross amount carried at end of period, buildings and improvements	18,956
Gross amount carried at end of period, total	23,666
Accumulated depreciation	10,766
Main Street Promenade | Naperville, IL
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,317
Initial cost of buildings and improvements	83,276
Adjustments to basis	289
Gross amount carried at end of period, land and improvements	4,317
Gross amount carried at end of period, buildings and improvements	83,565
Gross amount carried at end of period, total	87,882
Accumulated depreciation	9,027
Manchester Meadows | Town and Country, MO
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	14,700
Initial cost of buildings and improvements	39,738
Adjustments to basis	9,395
Gross amount carried at end of period, land and improvements	14,700
Gross amount carried at end of period, buildings and improvements	49,133
Gross amount carried at end of period, total	63,833
Accumulated depreciation	25,661
Mansfield Towne Crossing | Mansfield, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,300
Initial cost of buildings and improvements	12,195
Adjustments to basis	3,701
Gross amount carried at end of period, land and improvements	3,300
Gross amount carried at end of period, buildings and improvements	15,896
Gross amount carried at end of period, total	19,196
Accumulated depreciation	8,716
Merrifield Town Center | Falls Church, VA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	18,678
Initial cost of buildings and improvements	36,496
Adjustments to basis	1,224
Gross amount carried at end of period, land and improvements	18,678
Gross amount carried at end of period, buildings and improvements	37,720
Gross amount carried at end of period, total	56,398
Accumulated depreciation	7,001
Merrifield Town Center II | Falls Church, VA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	28,797
Initial cost of buildings and improvements	14,698
Adjustments to basis	105
Gross amount carried at end of period, land and improvements	28,797
Gross amount carried at end of period, buildings and improvements	14,803
Gross amount carried at end of period, total	43,600
Accumulated depreciation	2,142
New Forest Crossing | Houston, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,390
Initial cost of buildings and improvements	11,313
Adjustments to basis	1,107
Gross amount carried at end of period, land and improvements	4,390
Gross amount carried at end of period, buildings and improvements	12,420
Gross amount carried at end of period, total	16,810
Accumulated depreciation	2,949
New Hyde Park Shopping Center | New Hyde Park, NY
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	14,568
Initial cost of buildings and improvements	5,562
Adjustments to basis	(11)
Gross amount carried at end of period, land and improvements	14,568
Gross amount carried at end of period, buildings and improvements	5,551
Gross amount carried at end of period, total	20,119
Accumulated depreciation	625
Newnan Crossing I & II | Newnan, GA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	15,100
Initial cost of buildings and improvements	33,987
Adjustments to basis	9,863
Gross amount carried at end of period, land and improvements	15,100
Gross amount carried at end of period, buildings and improvements	43,850
Gross amount carried at end of period, total	58,950
Accumulated depreciation	22,945
Newton Crossroads | Covington, GA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,350
Initial cost of buildings and improvements	6,927
Adjustments to basis	927
Gross amount carried at end of period, land and improvements	3,350
Gross amount carried at end of period, buildings and improvements	7,854
Gross amount carried at end of period, total	11,204
Accumulated depreciation	4,037
North Benson Center | Renton, WA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	13,275
Initial cost of buildings and improvements	10,619
Adjustments to basis	487
Gross amount carried at end of period, land and improvements	13,275
Gross amount carried at end of period, buildings and improvements	11,106
Gross amount carried at end of period, total	24,381
Accumulated depreciation	386
Northgate North | Seattle, WA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	24,675
Initial cost of land	7,540
Initial cost of buildings and improvements	49,078
Adjustments to basis	(12,582)
Gross amount carried at end of period, land and improvements	7,540
Gross amount carried at end of period, buildings and improvements	36,496
Gross amount carried at end of period, total	44,036
Accumulated depreciation	21,016
Northpointe Plaza | Spokane, WA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	13,800
Initial cost of buildings and improvements	37,707
Adjustments to basis	9,544
Gross amount carried at end of period, land and improvements	13,800
Gross amount carried at end of period, buildings and improvements	47,251
Gross amount carried at end of period, total	61,051
Accumulated depreciation	24,725
Oak Brook Promenade | Oak Brook, IL
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	10,343
Initial cost of buildings and improvements	50,057
Adjustments to basis	1,776
Gross amount carried at end of period, land and improvements	10,343
Gross amount carried at end of period, buildings and improvements	51,833
Gross amount carried at end of period, total	62,176
Accumulated depreciation	7,789
One Loudoun | Ashburn, VA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	26,799
Initial cost of buildings and improvements	122,224
Adjustments to basis	129
Gross amount carried at end of period, land and improvements	15,067
Gross amount carried at end of period, buildings and improvements	134,085
Gross amount carried at end of period, total	149,152
Accumulated depreciation	15,409
Oswego Commons | Oswego, IL
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	6,454
Initial cost of buildings and improvements	16,004
Adjustments to basis	1,701
Gross amount carried at end of period, land and improvements	6,454
Gross amount carried at end of period, buildings and improvements	17,705
Gross amount carried at end of period, total	24,159
Accumulated depreciation	4,241
Paradise Valley Marketplace | Phoenix, AZ
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	8,134
Initial cost of buildings and improvements	20,425
Adjustments to basis	2,562
Gross amount carried at end of period, land and improvements	8,134
Gross amount carried at end of period, buildings and improvements	22,987
Gross amount carried at end of period, total	31,121
Accumulated depreciation	12,343
Parkway Towne Crossing | Frisco, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	6,142
Initial cost of buildings and improvements	20,423
Adjustments to basis	9,508
Gross amount carried at end of period, land and improvements	6,142
Gross amount carried at end of period, buildings and improvements	29,931
Gross amount carried at end of period, total	36,073
Accumulated depreciation	15,903
Pavillion at Kings Grant I & II | Concord, NC
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	10,274
Initial cost of buildings and improvements	12,392
Adjustments to basis	21,340
Gross amount carried at end of period, land and improvements	10,105
Gross amount carried at end of period, buildings and improvements	33,901
Gross amount carried at end of period, total	44,006
Accumulated depreciation	13,023
Pelham Manor Shopping Plaza | Pelham Manor, NY
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	0
Initial cost of buildings and improvements	67,870
Adjustments to basis	938
Gross amount carried at end of period, land and improvements	0
Gross amount carried at end of period, buildings and improvements	68,808
Gross amount carried at end of period, total	68,808
Accumulated depreciation	16,824
Peoria Crossings I & II | Peoria, AZ
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	24,110
Initial cost of land	6,995
Initial cost of buildings and improvements	32,816
Adjustments to basis	4,653
Gross amount carried at end of period, land and improvements	8,495
Gross amount carried at end of period, buildings and improvements	35,969
Gross amount carried at end of period, total	44,464
Accumulated depreciation	20,076
Plaza at Marysville | Marysville, WA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	6,600
Initial cost of buildings and improvements	13,728
Adjustments to basis	1,162
Gross amount carried at end of period, land and improvements	6,600
Gross amount carried at end of period, buildings and improvements	14,890
Gross amount carried at end of period, total	21,490
Accumulated depreciation	8,230
Plaza del Lago | Wilmette, IL
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,042
Initial cost of buildings and improvements	33,382
Adjustments to basis	4,027
Gross amount carried at end of period, land and improvements	12,042
Gross amount carried at end of period, buildings and improvements	37,409
Gross amount carried at end of period, total	49,451
Accumulated depreciation	2,741
Pleasant Run | Cedar Hill, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,200
Initial cost of buildings and improvements	29,085
Adjustments to basis	7,629
Gross amount carried at end of period, land and improvements	4,200
Gross amount carried at end of period, buildings and improvements	36,714
Gross amount carried at end of period, total	40,914
Accumulated depreciation	19,012
Reisterstown Road Plaza | Baltimore, MD
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	15,800
Initial cost of buildings and improvements	70,372
Adjustments to basis	24,474
Gross amount carried at end of period, land and improvements	15,790
Gross amount carried at end of period, buildings and improvements	94,856
Gross amount carried at end of period, total	110,646
Accumulated depreciation	45,506
Rivery Town Crossing | Georgetown, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,900
Initial cost of buildings and improvements	6,814
Adjustments to basis	1,284
Gross amount carried at end of period, land and improvements	2,900
Gross amount carried at end of period, buildings and improvements	8,098
Gross amount carried at end of period, total	10,998
Accumulated depreciation	3,638
Royal Oaks Village II | Houston, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,450
Initial cost of buildings and improvements	17,000
Adjustments to basis	964
Gross amount carried at end of period, land and improvements	3,450
Gross amount carried at end of period, buildings and improvements	17,964
Gross amount carried at end of period, total	21,414
Accumulated depreciation	7,022
Sawyer Heights Village | Houston, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	24,214
Initial cost of buildings and improvements	15,797
Adjustments to basis	778
Gross amount carried at end of period, land and improvements	24,214
Gross amount carried at end of period, buildings and improvements	16,575
Gross amount carried at end of period, total	40,789
Accumulated depreciation	4,170
Shoppes at Hagerstown | Hagerstown, MD
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,034
Initial cost of buildings and improvements	21,937
Adjustments to basis	275
Gross amount carried at end of period, land and improvements	4,034
Gross amount carried at end of period, buildings and improvements	22,212
Gross amount carried at end of period, total	26,246
Accumulated depreciation	3,670
The Shoppes at Quarterfield | Severn, MD
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,190
Initial cost of buildings and improvements	8,840
Adjustments to basis	359
Gross amount carried at end of period, land and improvements	2,190
Gross amount carried at end of period, buildings and improvements	9,199
Gross amount carried at end of period, total	11,389
Accumulated depreciation	5,207
The Shoppes at Union Hill | Denville, NJ
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	12,351
Initial cost of land	12,666
Initial cost of buildings and improvements	45,227
Adjustments to basis	2,608
Gross amount carried at end of period, land and improvements	12,666
Gross amount carried at end of period, buildings and improvements	47,835
Gross amount carried at end of period, total	60,501
Accumulated depreciation	6,789
Shoppes of New Hope | Dallas, GA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,350
Initial cost of buildings and improvements	11,045
Adjustments to basis	258
Gross amount carried at end of period, land and improvements	1,350
Gross amount carried at end of period, buildings and improvements	11,303
Gross amount carried at end of period, total	12,653
Accumulated depreciation	6,325
Shoppes of Prominence Point I & II | Canton, GA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,650
Initial cost of buildings and improvements	12,652
Adjustments to basis	734
Gross amount carried at end of period, land and improvements	3,650
Gross amount carried at end of period, buildings and improvements	13,386
Gross amount carried at end of period, total	17,036
Accumulated depreciation	7,304
Shops at Forest Commons | Round Rock, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,050
Initial cost of buildings and improvements	6,133
Adjustments to basis	428
Gross amount carried at end of period, land and improvements	1,050
Gross amount carried at end of period, buildings and improvements	6,561
Gross amount carried at end of period, total	7,611
Accumulated depreciation	3,607
The Shops at Legacy | Plano, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	8,800
Initial cost of buildings and improvements	108,940
Adjustments to basis	19,162
Gross amount carried at end of period, land and improvements	8,800
Gross amount carried at end of period, buildings and improvements	128,102
Gross amount carried at end of period, total	136,902
Accumulated depreciation	58,203
Shops at Park Place | Plano, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	9,096
Initial cost of buildings and improvements	13,175
Adjustments to basis	4,735
Gross amount carried at end of period, land and improvements	9,096
Gross amount carried at end of period, buildings and improvements	17,910
Gross amount carried at end of period, total	27,006
Accumulated depreciation	8,900
Southlake Corners | Southlake, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	6,612
Initial cost of buildings and improvements	23,605
Adjustments to basis	200
Gross amount carried at end of period, land and improvements	6,612
Gross amount carried at end of period, buildings and improvements	23,805
Gross amount carried at end of period, total	30,417
Accumulated depreciation	5,567
Southlake Town Square I - VII | Southlake, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	43,790
Initial cost of buildings and improvements	210,402
Adjustments to basis	32,890
Gross amount carried at end of period, land and improvements	41,604
Gross amount carried at end of period, buildings and improvements	245,478
Gross amount carried at end of period, total	287,082
Accumulated depreciation	111,172
Stilesboro Oaks | Acworth, GA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,200
Initial cost of buildings and improvements	9,426
Adjustments to basis	816
Gross amount carried at end of period, land and improvements	2,200
Gross amount carried at end of period, buildings and improvements	10,242
Gross amount carried at end of period, total	12,442
Accumulated depreciation	5,448
Stonebridge Plaza | McKinney, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,000
Initial cost of buildings and improvements	5,783
Adjustments to basis	847
Gross amount carried at end of period, land and improvements	1,000
Gross amount carried at end of period, buildings and improvements	6,630
Gross amount carried at end of period, total	7,630
Accumulated depreciation	3,373
Streets of Yorktown | Houston, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,440
Initial cost of buildings and improvements	22,111
Adjustments to basis	(20,558)
Gross amount carried at end of period, land and improvements	1,062
Gross amount carried at end of period, buildings and improvements	3,931
Gross amount carried at end of period, total	4,993
Accumulated depreciation	72
Tacoma South | Tacoma, WA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	10,976
Initial cost of buildings and improvements	22,898
Adjustments to basis	222
Gross amount carried at end of period, land and improvements	10,976
Gross amount carried at end of period, buildings and improvements	23,120
Gross amount carried at end of period, total	34,096
Accumulated depreciation	3,367
Target South Center | Austin, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,300
Initial cost of buildings and improvements	8,760
Adjustments to basis	730
Gross amount carried at end of period, land and improvements	2,300
Gross amount carried at end of period, buildings and improvements	9,490
Gross amount carried at end of period, total	11,790
Accumulated depreciation	5,029
Tollgate Marketplace | Bel Air, MD
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	8,700
Initial cost of buildings and improvements	61,247
Adjustments to basis	14,954
Gross amount carried at end of period, land and improvements	8,700
Gross amount carried at end of period, buildings and improvements	76,201
Gross amount carried at end of period, total	84,901
Accumulated depreciation	37,215
Towson Square | Towson, MD
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	13,757
Initial cost of buildings and improvements	21,958
Adjustments to basis	383
Gross amount carried at end of period, land and improvements	13,757
Gross amount carried at end of period, buildings and improvements	22,341
Gross amount carried at end of period, total	36,098
Accumulated depreciation	3,441
Tysons Corner | Vienna, VA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	22,525
Initial cost of buildings and improvements	7,184
Adjustments to basis	3,799
Gross amount carried at end of period, land and improvements	22,525
Gross amount carried at end of period, buildings and improvements	10,983
Gross amount carried at end of period, total	33,508
Accumulated depreciation	1,504
Village Shoppes at Simonton | Lawrenceville, GA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,200
Initial cost of buildings and improvements	10,874
Adjustments to basis	376
Gross amount carried at end of period, land and improvements	2,200
Gross amount carried at end of period, buildings and improvements	11,250
Gross amount carried at end of period, total	13,450
Accumulated depreciation	6,089
Walter's Crossing | Tampa, FL
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	14,500
Initial cost of buildings and improvements	16,914
Adjustments to basis	507
Gross amount carried at end of period, land and improvements	14,500
Gross amount carried at end of period, buildings and improvements	17,421
Gross amount carried at end of period, total	31,921
Accumulated depreciation	8,854
Watauga Pavillion | Watauga, TX
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,185
Initial cost of buildings and improvements	27,504
Adjustments to basis	1,728
Gross amount carried at end of period, land and improvements	5,185
Gross amount carried at end of period, buildings and improvements	29,232
Gross amount carried at end of period, total	34,417
Accumulated depreciation	16,223
Winchester Commons | Memphis, TN
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,400
Initial cost of buildings and improvements	7,471
Adjustments to basis	930
Gross amount carried at end of period, land and improvements	4,400
Gross amount carried at end of period, buildings and improvements	8,401
Gross amount carried at end of period, total	12,801
Accumulated depreciation	4,384
Woodinville Plaza | Woodinville, WA
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	16,073
Initial cost of buildings and improvements	25,433
Adjustments to basis	8,013
Gross amount carried at end of period, land and improvements	16,073
Gross amount carried at end of period, buildings and improvements	33,446
Gross amount carried at end of period, total	49,519
Accumulated depreciation	5,253
Total Operating Properties and Redevelopment Properties
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	94,155
Initial cost of land	1,058,803
Initial cost of buildings and improvements	3,266,098
Adjustments to basis	241,510
Gross amount carried at end of period, land and improvements	1,021,829
Gross amount carried at end of period, buildings and improvements	3,544,582
Gross amount carried at end of period, total	4,566,411
Accumulated depreciation	1,383,274
Developments in Progress
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	25,450
Initial cost of buildings and improvements	0
Adjustments to basis	87,903
Gross amount carried at end of period, land and improvements	65,319
Gross amount carried at end of period, buildings and improvements	48,034
Gross amount carried at end of period, total	113,353
Accumulated depreciation	$ 0
Building and associated improvements
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Estimated useful life (in years)	30 years
Site improvements and most other capital improvements
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Estimated useful life (in years)	15 years