SCHEDULE III-Consolidated Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	$ 111,000
Initial Cost, Land	593,583
Initial Cost, Building and Improvements	1,784,945
Cost Capitalized Subsequent to Acquisition	868,346
Gross Carrying Amount, Land	628,556
Gross Carrying Amount, Building and Improvements	2,618,318
Accumulated Depreciation and Amortization	(754,140)	$ (665,222)	$ (590,338)	$ (537,431)
The aggregate tax basis for Federal tax purposes	2,300,000
Alamo Quarry Market
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	26,396
Initial Cost, Building and Improvements	109,294
Cost Capitalized Subsequent to Acquisition	18,227
Gross Carrying Amount, Land	26,816
Gross Carrying Amount, Building and Improvements	127,101
Accumulated Depreciation and Amortization	(64,168)
Carmel Country Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	4,200
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	13,074
Gross Carrying Amount, Land	4,200
Gross Carrying Amount, Building and Improvements	13,074
Accumulated Depreciation and Amortization	(9,006)
Carmel Mountain Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	22,477
Initial Cost, Building and Improvements	65,217
Cost Capitalized Subsequent to Acquisition	38,934
Gross Carrying Amount, Land	31,034
Gross Carrying Amount, Building and Improvements	95,594
Accumulated Depreciation and Amortization	(47,365)
Del Monte Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	27,412
Initial Cost, Building and Improvements	87,570
Cost Capitalized Subsequent to Acquisition	35,136
Gross Carrying Amount, Land	27,117
Gross Carrying Amount, Building and Improvements	123,001
Accumulated Depreciation and Amortization	(70,136)
Gateway Marketplace
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	17,363
Initial Cost, Building and Improvements	21,644
Cost Capitalized Subsequent to Acquisition	1,239
Gross Carrying Amount, Land	17,363
Gross Carrying Amount, Building and Improvements	22,883
Accumulated Depreciation and Amortization	(2,889)
Geary Marketplace
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	8,239
Initial Cost, Building and Improvements	12,353
Cost Capitalized Subsequent to Acquisition	212
Gross Carrying Amount, Land	8,239
Gross Carrying Amount, Building and Improvements	12,565
Accumulated Depreciation and Amortization	(3,190)
Hassalo on Eighth - Retail
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	28,529
Gross Carrying Amount, Land	597
Gross Carrying Amount, Building and Improvements	27,932
Accumulated Depreciation and Amortization	(6,356)
Lomas Santa Fe Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	8,600
Initial Cost, Building and Improvements	11,282
Cost Capitalized Subsequent to Acquisition	13,767
Gross Carrying Amount, Land	8,620
Gross Carrying Amount, Building and Improvements	25,029
Accumulated Depreciation and Amortization	(17,927)
The Shops at Kalakaua
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	13,993
Initial Cost, Building and Improvements	10,817
Cost Capitalized Subsequent to Acquisition	144
Gross Carrying Amount, Land	14,006
Gross Carrying Amount, Building and Improvements	10,948
Accumulated Depreciation and Amortization	(4,989)
Solana Beach Towne Centre
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	40,980
Initial Cost, Building and Improvements	38,842
Cost Capitalized Subsequent to Acquisition	4,287
Gross Carrying Amount, Land	40,980
Gross Carrying Amount, Building and Improvements	43,129
Accumulated Depreciation and Amortization	(13,754)
South Bay Marketplace
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	4,401
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	12,513
Gross Carrying Amount, Land	4,401
Gross Carrying Amount, Building and Improvements	12,513
Accumulated Depreciation and Amortization	(8,009)
Waikele Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	55,593
Initial Cost, Building and Improvements	126,858
Cost Capitalized Subsequent to Acquisition	42,934
Gross Carrying Amount, Land	70,643
Gross Carrying Amount, Building and Improvements	154,742
Accumulated Depreciation and Amortization	(66,820)
City Center Bellevue
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	111,000
Initial Cost, Land	25,135
Initial Cost, Building and Improvements	190,998
Cost Capitalized Subsequent to Acquisition	53,599
Gross Carrying Amount, Land	25,135
Gross Carrying Amount, Building and Improvements	244,597
Accumulated Depreciation and Amortization	(62,613)
First & Main
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	14,697
Initial Cost, Building and Improvements	109,739
Cost Capitalized Subsequent to Acquisition	5,933
Gross Carrying Amount, Land	14,697
Gross Carrying Amount, Building and Improvements	115,672
Accumulated Depreciation and Amortization	(34,125)
The Land Mark at One Market
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	34,575
Initial Cost, Building and Improvements	141,196
Cost Capitalized Subsequent to Acquisition	27,900
Gross Carrying Amount, Land	34,575
Gross Carrying Amount, Building and Improvements	169,096
Accumulated Depreciation and Amortization	(40,885)
Lloyd District Portfolio
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	18,660
Initial Cost, Building and Improvements	61,401
Cost Capitalized Subsequent to Acquisition	101,072
Gross Carrying Amount, Land	11,845
Gross Carrying Amount, Building and Improvements	169,288
Accumulated Depreciation and Amortization	(43,017)
One Beach Street
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	15,332
Initial Cost, Building and Improvements	18,017
Cost Capitalized Subsequent to Acquisition	4,192
Gross Carrying Amount, Land	15,332
Gross Carrying Amount, Building and Improvements	22,209
Accumulated Depreciation and Amortization	(6,284)
Solana Beach Corporate Centre I-II
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	7,111
Initial Cost, Building and Improvements	17,100
Cost Capitalized Subsequent to Acquisition	7,514
Gross Carrying Amount, Land	7,111
Gross Carrying Amount, Building and Improvements	24,614
Accumulated Depreciation and Amortization	(7,623)
Solana Beach Corporate Centre III-IV
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	7,298
Initial Cost, Building and Improvements	27,887
Cost Capitalized Subsequent to Acquisition	5,678
Gross Carrying Amount, Land	7,298
Gross Carrying Amount, Building and Improvements	33,565
Accumulated Depreciation and Amortization	(9,616)
Solana Beach Corporate Centre Land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	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, 2020	0
Initial Cost, Land	4,095
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	56,586
Gross Carrying Amount, Land	5,408
Gross Carrying Amount, Building and Improvements	55,273
Accumulated Depreciation and Amortization	(20,723)
Pacific North Court
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	3,263
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	26,645
Gross Carrying Amount, Land	4,309
Gross Carrying Amount, Building and Improvements	25,599
Accumulated Depreciation and Amortization	(12,808)
Pacific South Court
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	3,285
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	40,066
Gross Carrying Amount, Land	4,226
Gross Carrying Amount, Building and Improvements	39,125
Accumulated Depreciation and Amortization	(16,498)
Pacific VC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	1,413
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	10,521
Gross Carrying Amount, Land	2,148
Gross Carrying Amount, Building and Improvements	9,786
Accumulated Depreciation and Amortization	(5,651)
Pacific Torrey Daycare
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	715
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	1,941
Gross Carrying Amount, Land	911
Gross Carrying Amount, Building and Improvements	1,745
Accumulated Depreciation and Amortization	(984)
Torrey Reserve Building 6
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	8,012
Gross Carrying Amount, Land	682
Gross Carrying Amount, Building and Improvements	7,330
Accumulated Depreciation and Amortization	(2,081)
Torrey Reserve Building 5
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	4,012
Gross Carrying Amount, Land	1,017
Gross Carrying Amount, Building and Improvements	2,995
Accumulated Depreciation and Amortization	(518)
Torrey Reserve Building 13 & 14
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	16,138
Gross Carrying Amount, Land	2,188
Gross Carrying Amount, Building and Improvements	13,950
Accumulated Depreciation and Amortization	(2,770)
Torrey Point
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	2,073
Initial Cost, Building and Improvements	741
Cost Capitalized Subsequent to Acquisition	49,668
Gross Carrying Amount, Land	5,050
Gross Carrying Amount, Building and Improvements	47,432
Accumulated Depreciation and Amortization	(3,346)
La Jolla Commons One & Two
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	62,312
Initial Cost, Building and Improvements	393,662
Cost Capitalized Subsequent to Acquisition	2,407
Gross Carrying Amount, Land	62,312
Gross Carrying Amount, Building and Improvements	396,069
Accumulated Depreciation and Amortization	(21,227)
La Jolla Commons - Land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	20,446
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	4,294
Gross Carrying Amount, Land	20,446
Gross Carrying Amount, Building and Improvements	4,294
Accumulated Depreciation and Amortization	0
Imperial Beach Gardens
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	1,281
Initial Cost, Building and Improvements	4,820
Cost Capitalized Subsequent to Acquisition	5,445
Gross Carrying Amount, Land	1,281
Gross Carrying Amount, Building and Improvements	10,265
Accumulated Depreciation and Amortization	(8,425)
Loma Palisades
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	14,000
Initial Cost, Building and Improvements	16,570
Cost Capitalized Subsequent to Acquisition	29,900
Gross Carrying Amount, Land	14,052
Gross Carrying Amount, Building and Improvements	46,418
Accumulated Depreciation and Amortization	(30,582)
Mariner's Point
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	2,744
Initial Cost, Building and Improvements	4,540
Cost Capitalized Subsequent to Acquisition	1,731
Gross Carrying Amount, Land	2,744
Gross Carrying Amount, Building and Improvements	6,271
Accumulated Depreciation and Amortization	(3,949)
Santa Fe Park Rv Resort
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	401
Initial Cost, Building and Improvements	928
Cost Capitalized Subsequent to Acquisition	1,263
Gross Carrying Amount, Land	401
Gross Carrying Amount, Building and Improvements	2,191
Accumulated Depreciation and Amortization	(1,562)
Pacific Ridge Apartments
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	47,971
Initial Cost, Building and Improvements	178,497
Cost Capitalized Subsequent to Acquisition	2,062
Gross Carrying Amount, Land	47,971
Gross Carrying Amount, Building and Improvements	180,559
Accumulated Depreciation and Amortization	(24,598)
Hassalo on Eighth - Residential
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	178,397
Gross Carrying Amount, Land	6,219
Gross Carrying Amount, Building and Improvements	172,178
Accumulated Depreciation and Amortization	(31,629)
Waikiki Beach Walk - Retail
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	45,995
Initial Cost, Building and Improvements	74,943
Cost Capitalized Subsequent to Acquisition	428
Gross Carrying Amount, Land	45,995
Gross Carrying Amount, Building and Improvements	75,371
Accumulated Depreciation and Amortization	(22,940)
Waikiki Beach Walk Hotel
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2020	0
Initial Cost, Land	30,640
Initial Cost, Building and Improvements	60,029
Cost Capitalized Subsequent to Acquisition	13,886
Gross Carrying Amount, Land	30,640
Gross Carrying Amount, Building and Improvements	73,915
Accumulated Depreciation and Amortization	$ (25,077)