Schedule III - Real Estate And Accumulated Depreciation Property - Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate and Accumulated Depreciation [Line Items]
Total gross amount	$ 2,200,839	$ 2,229,495	$ 2,516,085	$ 2,180,252
Accumulated depreciation	246,702	$ 286,330	$ 348,337	$ 351,389
Retail
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	176,051
Initial cost of land	564,860
Initial cost of buildings and improvements	1,553,382
Adjustments to land basis	7,493
Adjustment to basis	75,104
Gross amount of land and improvements	572,353
Gross amount of buildings and improvements	1,628,486
Total gross amount	2,200,839
Accumulated depreciation	246,702
Retail | BEAR CREEK VILLAGE CENTER Wildomar, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	12,748
Initial cost of land	3,523
Initial cost of buildings and improvements	12,384
Adjustments to land basis	0
Adjustment to basis	317
Gross amount of land and improvements	3,523
Gross amount of buildings and improvements	12,701
Total gross amount	16,224
Accumulated depreciation	4,965
Retail | BENT TREE PLAZA Raleigh, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,983
Initial cost of buildings and improvements	7,093
Adjustments to land basis	0
Adjustment to basis	1,605
Gross amount of land and improvements	1,983
Gross amount of buildings and improvements	8,698
Total gross amount	10,681
Accumulated depreciation	3,104
Retail | BUCKHEAD CROSSING Atlanta, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	7,565
Initial cost of buildings and improvements	27,104
Adjustments to land basis	0
Adjustment to basis	1,013
Gross amount of land and improvements	7,565
Gross amount of buildings and improvements	28,117
Total gross amount	35,682
Accumulated depreciation	11,052
Retail | CAMPUS MARKETPLACE San Marcos, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	41,000
Initial cost of land	26,928
Initial cost of buildings and improvements	43,445
Adjustments to land basis	55
Adjustment to basis	(33)
Gross amount of land and improvements	26,983
Gross amount of buildings and improvements	43,412
Total gross amount	70,395
Accumulated depreciation	4,681
Retail | CARY PARK TOWN CENTER Cary, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,555
Initial cost of buildings and improvements	17,280
Adjustments to land basis	0
Adjustment to basis	0
Gross amount of land and improvements	5,555
Gross amount of buildings and improvements	17,280
Total gross amount	22,835
Accumulated depreciation	1,534
Retail | CENTERPLACE OF GREELEY Greeley, CO
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	13,795
Initial cost of land	3,904
Initial cost of buildings and improvements	14,715
Adjustments to land basis	0
Adjustment to basis	369
Gross amount of land and improvements	3,904
Gross amount of buildings and improvements	15,084
Total gross amount	18,988
Accumulated depreciation	5,978
Retail | CHEYENNE MEADOWS Colorado Springs, CO
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,023
Initial cost of buildings and improvements	6,991
Adjustments to land basis	0
Adjustment to basis	171
Gross amount of land and improvements	2,023
Gross amount of buildings and improvements	7,162
Total gross amount	9,185
Accumulated depreciation	2,843
Retail | COMMONS AT UNIVERSITY PLACE Raleigh, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,198
Initial cost of buildings and improvements	17,909
Adjustments to land basis	0
Adjustment to basis	0
Gross amount of land and improvements	3,198
Gross amount of buildings and improvements	17,909
Total gross amount	21,107
Accumulated depreciation	569
Retail | COWETA CROSSING Newnan, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,143
Initial cost of buildings and improvements	4,590
Adjustments to land basis	0
Adjustment to basis	8
Gross amount of land and improvements	1,143
Gross amount of buildings and improvements	4,598
Total gross amount	5,741
Accumulated depreciation	1,898
Retail | CUSTER CREEK VILLAGE Richardson, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,750
Initial cost of buildings and improvements	12,245
Adjustments to land basis	0
Adjustment to basis	387
Gross amount of land and improvements	4,750
Gross amount of buildings and improvements	12,632
Total gross amount	17,382
Accumulated depreciation	5,534
Retail | ELDORADO MARKETPLACE Dallas, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	15,732
Initial cost of buildings and improvements	49,311
Adjustments to land basis	0
Adjustment to basis	0
Gross amount of land and improvements	15,732
Gross amount of buildings and improvements	49,311
Total gross amount	65,043
Accumulated depreciation	582
Retail | ELDRIDGE TOWN CENTER Houston, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,380
Initial cost of buildings and improvements	22,994
Adjustments to land basis	0
Adjustment to basis	1,687
Gross amount of land and improvements	5,380
Gross amount of buildings and improvements	24,681
Total gross amount	30,061
Accumulated depreciation	12,470
Retail | GARDEN VILLAGE San Pedro, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,188
Initial cost of buildings and improvements	16,522
Adjustments to land basis	3,268
Adjustment to basis	144
Gross amount of land and improvements	6,456
Gross amount of buildings and improvements	16,666
Total gross amount	23,122
Accumulated depreciation	6,379
Retail | GATEWAY MARKET CENTER Tampa, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	13,600
Initial cost of buildings and improvements	4,992
Adjustments to land basis	0
Adjustment to basis	4,011
Gross amount of land and improvements	13,600
Gross amount of buildings and improvements	9,003
Total gross amount	22,603
Accumulated depreciation	2,232
Retail | KENNESAW MARKETPLACE Kennesaw, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,587
Initial cost of buildings and improvements	51,860
Adjustments to land basis	0
Adjustment to basis	242
Gross amount of land and improvements	12,587
Gross amount of buildings and improvements	52,102
Total gross amount	64,689
Accumulated depreciation	2,840
Retail | KROGER TOMBALL Tomball, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,104
Initial cost of buildings and improvements	10,223
Adjustments to land basis	0
Adjustment to basis	0
Gross amount of land and improvements	1,104
Gross amount of buildings and improvements	10,223
Total gross amount	11,327
Accumulated depreciation	241
Retail | KYLE MARKETPLACE Kyle, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	6,076
Initial cost of buildings and improvements	48,220
Adjustments to land basis	0
Adjustment to basis	331
Gross amount of land and improvements	6,076
Gross amount of buildings and improvements	48,551
Total gross amount	54,627
Accumulated depreciation	3,902
Retail | LAKESIDE WINTER PARK AND LAKESIDE CROSSINGS Orland, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	16,594
Initial cost of buildings and improvements	41,085
Adjustments to land basis	0
Adjustment to basis	0
Gross amount of land and improvements	16,594
Gross amount of buildings and improvements	41,085
Total gross amount	57,679
Accumulated depreciation	1,090
Retail | MARKET AT WESTLAKE Westlake Hills, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,200
Initial cost of buildings and improvements	6,274
Adjustments to land basis	(64)
Adjustment to basis	0
Gross amount of land and improvements	1,136
Gross amount of buildings and improvements	6,274
Total gross amount	7,410
Accumulated depreciation	2,802
Retail | NORTHCROSS COMMONS Charlotte, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	7,591
Initial cost of buildings and improvements	21,303
Adjustments to land basis	0
Adjustment to basis	463
Gross amount of land and improvements	7,591
Gross amount of buildings and improvements	21,766
Total gross amount	29,357
Accumulated depreciation	2,479
Retail | OLD GROVE MARKETPLACE Oceanside, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,545
Initial cost of buildings and improvements	8,902
Adjustments to land basis	0
Adjustment to basis	49
Gross amount of land and improvements	12,545
Gross amount of buildings and improvements	8,951
Total gross amount	21,496
Accumulated depreciation	1,156
Retail | PARAISO PARC AND WESTFORK PLAZA Pembroke Pines, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	28,267
Initial cost of buildings and improvements	124,019
Adjustments to land basis	0
Adjustment to basis	4,367
Gross amount of land and improvements	28,267
Gross amount of buildings and improvements	128,386
Total gross amount	156,653
Accumulated depreciation	12,518
Retail | PAVILION AT LAQUINTA LaQuinta, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	23,245
Initial cost of land	15,200
Initial cost of buildings and improvements	20,947
Adjustments to land basis	0
Adjustment to basis	856
Gross amount of land and improvements	15,200
Gross amount of buildings and improvements	21,803
Total gross amount	37,003
Accumulated depreciation	8,417
Retail | PEACHLAND PROMENADE Port Charlotte, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,742
Initial cost of buildings and improvements	6,502
Adjustments to land basis	4,158
Adjustment to basis	7,857
Gross amount of land and improvements	5,900
Gross amount of buildings and improvements	14,359
Total gross amount	20,259
Accumulated depreciation	942
Retail | PGA PLAZA Palm Beach Gardens, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	10,414
Initial cost of buildings and improvements	75,730
Adjustments to land basis	0
Adjustment to basis	302
Gross amount of land and improvements	10,414
Gross amount of buildings and improvements	76,032
Total gross amount	86,446
Accumulated depreciation	4,075
Retail | PLANTATION GROVE Ocoee, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	7,300
Initial cost of land	3,705
Initial cost of buildings and improvements	6,300
Adjustments to land basis	0
Adjustment to basis	708
Gross amount of land and improvements	3,705
Gross amount of buildings and improvements	7,008
Total gross amount	10,713
Accumulated depreciation	1,485
Retail | PLAZA MIDTOWN Atlanta, GL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,295
Initial cost of buildings and improvements	23,946
Adjustments to land basis	0
Adjustment to basis	194
Gross amount of land and improvements	5,295
Gross amount of buildings and improvements	24,140
Total gross amount	29,435
Accumulated depreciation	1,871
Retail | RENAISSANCE CENTER Durham, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	14,818
Initial cost of land	26,713
Initial cost of buildings and improvements	96,141
Adjustments to land basis	0
Adjustment to basis	3,571
Gross amount of land and improvements	26,713
Gross amount of buildings and improvements	99,712
Total gross amount	126,425
Accumulated depreciation	13,650
Retail | RIO PINOR PLAZA Orlando, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,171
Initial cost of buildings and improvements	26,903
Adjustments to land basis	0
Adjustment to basis	216
Gross amount of land and improvements	5,171
Gross amount of buildings and improvements	27,119
Total gross amount	32,290
Accumulated depreciation	4,083
Retail | RIVER OAKS SHOPPING CENTER Valencia, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	24,598
Initial cost of buildings and improvements	88,418
Adjustments to land basis	0
Adjustment to basis	205
Gross amount of land and improvements	24,598
Gross amount of buildings and improvements	88,623
Total gross amount	113,221
Accumulated depreciation	7,142
Retail | RIVERVIEW VILLAGE Arlington, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	6,000
Initial cost of buildings and improvements	9,649
Adjustments to land basis	0
Adjustment to basis	822
Gross amount of land and improvements	6,000
Gross amount of buildings and improvements	10,471
Total gross amount	16,471
Accumulated depreciation	4,711
Retail | RIVERWALK MARKET Flower Mound, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,931
Initial cost of buildings and improvements	23,922
Adjustments to land basis	0
Adjustment to basis	73
Gross amount of land and improvements	5,931
Gross amount of buildings and improvements	23,995
Total gross amount	29,926
Accumulated depreciation	2,773
Retail | ROSE CREEK Woodstock, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,443
Initial cost of buildings and improvements	5,630
Adjustments to land basis	0
Adjustment to basis	530
Gross amount of land and improvements	1,443
Gross amount of buildings and improvements	6,160
Total gross amount	7,603
Accumulated depreciation	2,337
Retail | SANDY PLAINS CENTRE Marietta, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,364
Initial cost of buildings and improvements	27,270
Adjustments to land basis	652
Adjustment to basis	2,066
Gross amount of land and improvements	13,016
Gross amount of buildings and improvements	29,336
Total gross amount	42,352
Accumulated depreciation	1,002
Retail | SARASOTA PAVILION Sarasota, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,000
Initial cost of buildings and improvements	25,823
Adjustments to land basis	0
Adjustment to basis	4,310
Gross amount of land and improvements	12,000
Gross amount of buildings and improvements	30,133
Total gross amount	42,133
Accumulated depreciation	9,579
Retail | SCOFIELD CROSSING Austin, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	8,100
Initial cost of buildings and improvements	4,992
Adjustments to land basis	(576)
Adjustment to basis	3,269
Gross amount of land and improvements	7,524
Gross amount of buildings and improvements	8,261
Total gross amount	15,785
Accumulated depreciation	2,457
Retail | SHOPS AT FAIRVIEW TOWN CENTER Dallas, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	7,299
Initial cost of buildings and improvements	25,233
Adjustments to land basis	0
Adjustment to basis	0
Gross amount of land and improvements	7,299
Gross amount of buildings and improvements	25,233
Total gross amount	32,532
Accumulated depreciation	431
Retail | SHOPS AT THE GALLERIA Austin, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	52,104
Initial cost of buildings and improvements	75,651
Adjustments to land basis	0
Adjustment to basis	624
Gross amount of land and improvements	52,104
Gross amount of buildings and improvements	76,275
Total gross amount	128,379
Accumulated depreciation	10,486
Retail | SONTERRA VILLAGE San Antonio, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,150
Initial cost of buildings and improvements	15,095
Adjustments to land basis	0
Adjustment to basis	404
Gross amount of land and improvements	5,150
Gross amount of buildings and improvements	15,499
Total gross amount	20,649
Accumulated depreciation	2,199
Retail | SOUTHERN PALM CROSSING Miami, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	37,735
Initial cost of buildings and improvements	49,843
Adjustments to land basis	0
Adjustment to basis	0
Gross amount of land and improvements	37,735
Gross amount of buildings and improvements	49,843
Total gross amount	87,578
Accumulated depreciation	941
Retail | STEVENSON RANCH Stevenson Ranch, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	29,519
Initial cost of buildings and improvements	39,190
Adjustments to land basis	0
Adjustment to basis	146
Gross amount of land and improvements	29,519
Gross amount of buildings and improvements	39,336
Total gross amount	68,855
Accumulated depreciation	5,238
Retail | SUNCREST VILLAGE Orlando, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	8,400
Initial cost of land	6,742
Initial cost of buildings and improvements	6,403
Adjustments to land basis	0
Adjustment to basis	911
Gross amount of land and improvements	6,742
Gross amount of buildings and improvements	7,314
Total gross amount	14,056
Accumulated depreciation	1,515
Retail | SYCAMORE COMMONS Matthews, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,500
Initial cost of buildings and improvements	31,265
Adjustments to land basis	0
Adjustment to basis	3,176
Gross amount of land and improvements	12,500
Gross amount of buildings and improvements	34,441
Total gross amount	46,941
Accumulated depreciation	12,872
Retail | THE CENTER AT HUGH HOWELL Tucker, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,250
Initial cost of buildings and improvements	11,091
Adjustments to land basis	0
Adjustment to basis	751
Gross amount of land and improvements	2,250
Gross amount of buildings and improvements	11,842
Total gross amount	14,092
Accumulated depreciation	5,611
Retail | THE PARKE Cedar Park, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	9,271
Initial cost of buildings and improvements	83,078
Adjustments to land basis	0
Adjustment to basis	428
Gross amount of land and improvements	9,271
Gross amount of buildings and improvements	83,506
Total gross amount	92,777
Accumulated depreciation	7,011
Retail | THE POINTE AT CREEDMOOR Raleigh, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	7,507
Initial cost of buildings and improvements	5,454
Adjustments to land basis	0
Adjustment to basis	55
Gross amount of land and improvements	7,507
Gross amount of buildings and improvements	5,509
Total gross amount	13,016
Accumulated depreciation	774
Retail | THE SHOPS AT TOWN CENTER Germantown, MD
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	19,998
Initial cost of buildings and improvements	29,776
Adjustments to land basis	0
Adjustment to basis	295
Gross amount of land and improvements	19,998
Gross amount of buildings and improvements	30,071
Total gross amount	50,069
Accumulated depreciation	2,987
Retail | THE SHOPS AT WALNUT CREEK Westminster, CO
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	28,630
Initial cost of land	10,132
Initial cost of buildings and improvements	44,089
Adjustments to land basis	0
Adjustment to basis	1,876
Gross amount of land and improvements	10,132
Gross amount of buildings and improvements	45,965
Total gross amount	56,097
Accumulated depreciation	7,644
Retail | THOMAS CROSSROADS Newnan, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,622
Initial cost of buildings and improvements	8,322
Adjustments to land basis	0
Adjustment to basis	1,156
Gross amount of land and improvements	1,622
Gross amount of buildings and improvements	9,478
Total gross amount	11,100
Accumulated depreciation	3,489
Retail | TRAVILAH SQUARE Washington, D.C.
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	8,964
Initial cost of buildings and improvements	39,836
Adjustments to land basis	0
Adjustment to basis	0
Gross amount of land and improvements	8,964
Gross amount of buildings and improvements	39,836
Total gross amount	48,800
Accumulated depreciation	449
Retail | UNIVERSITY OAKS SHOPPING CENTER Round Rock, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	26,115
Initial cost of land	7,250
Initial cost of buildings and improvements	25,326
Adjustments to land basis	0
Adjustment to basis	8,098
Gross amount of land and improvements	7,250
Gross amount of buildings and improvements	33,424
Total gross amount	40,674
Accumulated depreciation	11,585
Retail | WESTPARK SHOPPING CENTER Glen Allen, VA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	7,462
Initial cost of buildings and improvements	24,164
Adjustments to land basis	0
Adjustment to basis	4,279
Gross amount of land and improvements	7,462
Gross amount of buildings and improvements	28,443
Total gross amount	35,905
Accumulated depreciation	3,256
Retail | WINDWARD COMMONS Alpharetta, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,823
Initial cost of buildings and improvements	13,779
Adjustments to land basis	0
Adjustment to basis	320
Gross amount of land and improvements	12,823
Gross amount of buildings and improvements	14,099
Total gross amount	26,922
Accumulated depreciation	1,749
Retail | WOODLAKE CROSSING San Antonio, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,420
Initial cost of buildings and improvements	14,153
Adjustments to land basis	0
Adjustment to basis	3,411
Gross amount of land and improvements	3,420
Gross amount of buildings and improvements	17,564
Total gross amount	20,984
Accumulated depreciation	6,464
Retail | Total Corporate Assets
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	0
Initial cost of buildings and improvements	0
Adjustments to land basis	0
Adjustment to basis	9,064
Gross amount of land and improvements	0
Gross amount of buildings and improvements	9,064
Total gross amount	9,064
Accumulated depreciation	$ 6,628