SCHEDULE III-Consolidated 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]
Encumbrance as of December 31, 2019	$ 162,003
Initial Cost, Land	593,583
Initial Cost, Building and Improvements	1,784,945
Cost Capitalized Subsequent to Acquisition	810,169
Gross Carrying Amount, Land	628,556
Gross Carrying Amount, Building and Improvements	2,560,141
Accumulated Depreciation and Amortization	(665,222)	$ (590,338)	$ (537,431)	$ (469,460)
The aggregate tax basis for Federal tax purposes	2,400,000
Alamo Quarry Market
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	26,396
Initial Cost, Building and Improvements	109,294
Cost Capitalized Subsequent to Acquisition	18,142
Gross Carrying Amount, Land	26,816
Gross Carrying Amount, Building and Improvements	127,016
Accumulated Depreciation and Amortization	(61,257)
Carmel Country Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	4,200
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	12,899
Gross Carrying Amount, Land	4,200
Gross Carrying Amount, Building and Improvements	12,899
Accumulated Depreciation and Amortization	(8,675)
Carmel Mountain Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	22,477
Initial Cost, Building and Improvements	65,217
Cost Capitalized Subsequent to Acquisition	38,563
Gross Carrying Amount, Land	31,034
Gross Carrying Amount, Building and Improvements	95,223
Accumulated Depreciation and Amortization	(44,156)
Del Monte Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	27,412
Initial Cost, Building and Improvements	87,570
Cost Capitalized Subsequent to Acquisition	34,379
Gross Carrying Amount, Land	27,117
Gross Carrying Amount, Building and Improvements	122,244
Accumulated Depreciation and Amortization	(66,204)
Gateway Marketplace
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	17,363
Initial Cost, Building and Improvements	21,644
Cost Capitalized Subsequent to Acquisition	1,097
Gross Carrying Amount, Land	17,363
Gross Carrying Amount, Building and Improvements	22,741
Accumulated Depreciation and Amortization	(2,040)
Geary Marketplace
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	8,239
Initial Cost, Building and Improvements	12,353
Cost Capitalized Subsequent to Acquisition	171
Gross Carrying Amount, Land	8,239
Gross Carrying Amount, Building and Improvements	12,524
Accumulated Depreciation and Amortization	(2,800)
Hassalo on Eighth - Retail
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	28,364
Gross Carrying Amount, Land	597
Gross Carrying Amount, Building and Improvements	27,767
Accumulated Depreciation and Amortization	(5,106)
Lomas Santa Fe Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	8,600
Initial Cost, Building and Improvements	11,282
Cost Capitalized Subsequent to Acquisition	13,805
Gross Carrying Amount, Land	8,620
Gross Carrying Amount, Building and Improvements	25,067
Accumulated Depreciation and Amortization	(17,166)
The Shops at Kalakaua
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	13,993
Initial Cost, Building and Improvements	10,817
Cost Capitalized Subsequent to Acquisition	(6)
Gross Carrying Amount, Land	14,006
Gross Carrying Amount, Building and Improvements	10,798
Accumulated Depreciation and Amortization	(4,674)
Solana Beach Towne Centre
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	34,235
Initial Cost, Land	40,980
Initial Cost, Building and Improvements	38,842
Cost Capitalized Subsequent to Acquisition	4,222
Gross Carrying Amount, Land	40,980
Gross Carrying Amount, Building and Improvements	43,064
Accumulated Depreciation and Amortization	(12,291)
South Bay Marketplace
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	4,401
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	12,760
Gross Carrying Amount, Land	4,401
Gross Carrying Amount, Building and Improvements	12,760
Accumulated Depreciation and Amortization	(7,695)
Waikele Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	55,593
Initial Cost, Building and Improvements	126,858
Cost Capitalized Subsequent to Acquisition	41,174
Gross Carrying Amount, Land	70,643
Gross Carrying Amount, Building and Improvements	152,982
Accumulated Depreciation and Amortization	(62,126)
City Center Bellevue
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	111,000
Initial Cost, Land	25,135
Initial Cost, Building and Improvements	190,998
Cost Capitalized Subsequent to Acquisition	46,320
Gross Carrying Amount, Land	25,135
Gross Carrying Amount, Building and Improvements	237,318
Accumulated Depreciation and Amortization	(52,543)
First & Main
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	14,697
Initial Cost, Building and Improvements	109,739
Cost Capitalized Subsequent to Acquisition	7,708
Gross Carrying Amount, Land	14,697
Gross Carrying Amount, Building and Improvements	117,447
Accumulated Depreciation and Amortization	(32,259)
The Land Mark at One Market
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	34,575
Initial Cost, Building and Improvements	141,196
Cost Capitalized Subsequent to Acquisition	13,351
Gross Carrying Amount, Land	34,575
Gross Carrying Amount, Building and Improvements	154,547
Accumulated Depreciation and Amortization	(36,102)
Lloyd District Portfolio
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	18,660
Initial Cost, Building and Improvements	61,401
Cost Capitalized Subsequent to Acquisition	90,191
Gross Carrying Amount, Land	11,845
Gross Carrying Amount, Building and Improvements	158,407
Accumulated Depreciation and Amortization	(34,828)
One Beach Street
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	15,332
Initial Cost, Building and Improvements	18,017
Cost Capitalized Subsequent to Acquisition	3,353
Gross Carrying Amount, Land	15,332
Gross Carrying Amount, Building and Improvements	21,370
Accumulated Depreciation and Amortization	(5,716)
Solana Beach Corporate Centre I-II
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	10,270
Initial Cost, Land	7,111
Initial Cost, Building and Improvements	17,100
Cost Capitalized Subsequent to Acquisition	6,876
Gross Carrying Amount, Land	7,111
Gross Carrying Amount, Building and Improvements	23,976
Accumulated Depreciation and Amortization	(6,515)
Solana Beach Corporate Centre III-IV
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	7,298
Initial Cost, Building and Improvements	27,887
Cost Capitalized Subsequent to Acquisition	4,448
Gross Carrying Amount, Land	7,298
Gross Carrying Amount, Building and Improvements	32,335
Accumulated Depreciation and Amortization	(8,429)
Solana Beach Corporate Centre Land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	487
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	60
Gross Carrying Amount, Land	547
Gross Carrying Amount, Building and Improvements	0
Accumulated Depreciation and Amortization	0
Torrey Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	4,095
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	52,130
Gross Carrying Amount, Land	5,408
Gross Carrying Amount, Building and Improvements	50,817
Accumulated Depreciation and Amortization	(18,440)
Pacific North Court
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	3,263
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	26,182
Gross Carrying Amount, Land	4,309
Gross Carrying Amount, Building and Improvements	25,136
Accumulated Depreciation and Amortization	(12,015)
Pacific South Court
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	3,285
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	39,489
Gross Carrying Amount, Land	4,226
Gross Carrying Amount, Building and Improvements	38,548
Accumulated Depreciation and Amortization	(14,733)
Pacific VC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	6,498
Initial Cost, Land	1,413
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	10,154
Gross Carrying Amount, Land	2,148
Gross Carrying Amount, Building and Improvements	9,419
Accumulated Depreciation and Amortization	(5,234)
Pacific Torrey Daycare
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	715
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	1,914
Gross Carrying Amount, Land	911
Gross Carrying Amount, Building and Improvements	1,718
Accumulated Depreciation and Amortization	(939)
Torrey Reserve Building 6
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	8,006
Gross Carrying Amount, Land	682
Gross Carrying Amount, Building and Improvements	7,324
Accumulated Depreciation and Amortization	(1,787)
Torrey Reserve Building 5
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	4,010
Gross Carrying Amount, Land	1,017
Gross Carrying Amount, Building and Improvements	2,993
Accumulated Depreciation and Amortization	(358)
Torrey Reserve Building 13 & 14
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	15,916
Gross Carrying Amount, Land	2,188
Gross Carrying Amount, Building and Improvements	13,728
Accumulated Depreciation and Amortization	(1,981)
Torrey Point
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	2,073
Initial Cost, Building and Improvements	741
Cost Capitalized Subsequent to Acquisition	45,229
Gross Carrying Amount, Land	5,050
Gross Carrying Amount, Building and Improvements	42,993
Accumulated Depreciation and Amortization	(1,655)
La Jolla Commons One & Two
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	62,312
Initial Cost, Building and Improvements	393,662
Cost Capitalized Subsequent to Acquisition	882
Gross Carrying Amount, Land	62,312
Gross Carrying Amount, Building and Improvements	394,544
Accumulated Depreciation and Amortization	(8,060)
La Jolla Commons - Land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	20,446
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	1,592
Gross Carrying Amount, Land	20,446
Gross Carrying Amount, Building and Improvements	1,592
Accumulated Depreciation and Amortization	0
Imperial Beach Gardens
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	1,281
Initial Cost, Building and Improvements	4,820
Cost Capitalized Subsequent to Acquisition	5,049
Gross Carrying Amount, Land	1,281
Gross Carrying Amount, Building and Improvements	9,869
Accumulated Depreciation and Amortization	(8,209)
Loma Palisades
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	14,000
Initial Cost, Building and Improvements	16,570
Cost Capitalized Subsequent to Acquisition	28,085
Gross Carrying Amount, Land	14,052
Gross Carrying Amount, Building and Improvements	44,603
Accumulated Depreciation and Amortization	(29,226)
Mariner's Point
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	2,744
Initial Cost, Building and Improvements	4,540
Cost Capitalized Subsequent to Acquisition	1,695
Gross Carrying Amount, Land	2,744
Gross Carrying Amount, Building and Improvements	6,235
Accumulated Depreciation and Amortization	(3,683)
Santa Fe Park Rv Resort
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	401
Initial Cost, Building and Improvements	928
Cost Capitalized Subsequent to Acquisition	1,061
Gross Carrying Amount, Land	401
Gross Carrying Amount, Building and Improvements	1,989
Accumulated Depreciation and Amortization	(1,515)
Pacific Ridge Apartments
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	47,971
Initial Cost, Building and Improvements	178,497
Cost Capitalized Subsequent to Acquisition	1,643
Gross Carrying Amount, Land	47,971
Gross Carrying Amount, Building and Improvements	180,140
Accumulated Depreciation and Amortization	(17,930)
Hassalo on Eighth - Residential
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	178,075
Gross Carrying Amount, Land	6,219
Gross Carrying Amount, Building and Improvements	171,856
Accumulated Depreciation and Amortization	(25,645)
Waikiki Beach Walk - Retail
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	45,995
Initial Cost, Building and Improvements	74,943
Cost Capitalized Subsequent to Acquisition	851
Gross Carrying Amount, Land	45,995
Gross Carrying Amount, Building and Improvements	75,794
Accumulated Depreciation and Amortization	(21,039)
Waikiki Beach Walk Hotel
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2019	0
Initial Cost, Land	30,640
Initial Cost, Building and Improvements	60,029
Cost Capitalized Subsequent to Acquisition	10,329
Gross Carrying Amount, Land	30,640
Gross Carrying Amount, Building and Improvements	70,358
Accumulated Depreciation and Amortization	$ (22,191)