SCHEDULE III-Consolidated Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 279,889
Initial Cost, Land	518,672
Initial Cost, Building and Improvements	1,391,485
Cost Capitalized Subsequent to Acquisition	703,981
Gross Carrying Amount, Land	555,738
Gross Carrying Amount, Building and Improvements	2,058,400
Accumulated Depreciation and Amortization	(537,431)	$ (469,460)	$ (411,166)	$ (361,424)
The Aggregate tax basis for Federal tax purposes	1,900,000
Alamo Quarry Market
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	0
Initial Cost, Land	26,396
Initial Cost, Building and Improvements	109,294
Cost Capitalized Subsequent to Acquisition	14,405
Gross Carrying Amount, Land	26,816
Gross Carrying Amount, Building and Improvements	123,279
Accumulated Depreciation and Amortization	$ (54,036)
Year Built/ Renovated	1997/1999
Date Acquired	Dec. 09, 2003
Life on which depreciation in latest income statements is computed	35 years
Carmel Country Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	4,200
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	12,737
Gross Carrying Amount, Land	4,200
Gross Carrying Amount, Building and Improvements	12,737
Accumulated Depreciation and Amortization	$ (7,807)
Year Built/ Renovated	1991
Date Acquired	Jan. 10, 1989
Life on which depreciation in latest income statements is computed	35 years
Carmel Mountain Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	22,477
Initial Cost, Building and Improvements	65,217
Cost Capitalized Subsequent to Acquisition	29,003
Gross Carrying Amount, Land	31,035
Gross Carrying Amount, Building and Improvements	85,662
Accumulated Depreciation and Amortization	$ (38,406)
Year Built/ Renovated	1994/2014
Date Acquired	Mar. 28, 2003
Life on which depreciation in latest income statements is computed	35 years
Del Monte Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	27,412
Initial Cost, Building and Improvements	87,570
Cost Capitalized Subsequent to Acquisition	29,902
Gross Carrying Amount, Land	27,117
Gross Carrying Amount, Building and Improvements	117,767
Accumulated Depreciation and Amortization	$ (57,704)
Year Built/ Renovated	1967/1984/2006
Date Acquired	Apr. 08, 2004
Life on which depreciation in latest income statements is computed	35 years
Gateway Marketplace
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	17,363
Initial Cost, Building and Improvements	21,644
Cost Capitalized Subsequent to Acquisition	335
Gross Carrying Amount, Land	17,363
Gross Carrying Amount, Building and Improvements	21,979
Accumulated Depreciation and Amortization	$ (376)
Year Built/ Renovated	1997/2016
Date Acquired	Jul. 06, 2017
Life on which depreciation in latest income statements is computed	35 years
Geary Marketplace
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	8,239
Initial Cost, Building and Improvements	12,353
Cost Capitalized Subsequent to Acquisition	165
Gross Carrying Amount, Land	8,238
Gross Carrying Amount, Building and Improvements	12,519
Accumulated Depreciation and Amortization	$ (2,036)
Year Built/ Renovated	2012
Date Acquired	Dec. 19, 2012
Life on which depreciation in latest income statements is computed	35 years
Hassalo on Eighth - Retail
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	28,302
Gross Carrying Amount, Land	597
Gross Carrying Amount, Building and Improvements	27,705
Accumulated Depreciation and Amortization	$ (2,229)
Year Built/ Renovated	2015
Date Acquired	Jul. 01, 2011
Life on which depreciation in latest income statements is computed	35 years
Lomas Santa Fe Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	8,600
Initial Cost, Building and Improvements	11,282
Cost Capitalized Subsequent to Acquisition	13,067
Gross Carrying Amount, Land	8,620
Gross Carrying Amount, Building and Improvements	24,329
Accumulated Depreciation and Amortization	$ (15,578)
Year Built/ Renovated	1972/1997
Date Acquired	Jun. 12, 1995
Life on which depreciation in latest income statements is computed	35 years
The Shops at Kalakaua
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 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	$ (4,058)
Year Built/ Renovated	1971/2006
Date Acquired	Mar. 31, 2005
Life on which depreciation in latest income statements is computed	35 years
Solana Beach Towne Centre
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 35,737
Initial Cost, Land	40,980
Initial Cost, Building and Improvements	38,842
Cost Capitalized Subsequent to Acquisition	2,684
Gross Carrying Amount, Land	40,980
Gross Carrying Amount, Building and Improvements	41,526
Accumulated Depreciation and Amortization	$ (9,423)
Year Built/ Renovated	1973/2000/2004
Date Acquired	Jan. 19, 2011
Life on which depreciation in latest income statements is computed	35 years
South Bay Marketplace
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	4,401
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	11,036
Gross Carrying Amount, Land	4,401
Gross Carrying Amount, Building and Improvements	11,036
Accumulated Depreciation and Amortization	$ (6,985)
Year Built/ Renovated	1997
Date Acquired	Sep. 16, 1995
Life on which depreciation in latest income statements is computed	35 years
Waikele Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	55,593
Initial Cost, Building and Improvements	126,858
Cost Capitalized Subsequent to Acquisition	60,654
Gross Carrying Amount, Land	70,643
Gross Carrying Amount, Building and Improvements	172,462
Accumulated Depreciation and Amortization	$ (67,176)
Year Built/ Renovated	1993/2008
Date Acquired	Sep. 16, 2004
Life on which depreciation in latest income statements is computed	35 years
City Center Bellevue
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 111,000
Initial Cost, Land	25,135
Initial Cost, Building and Improvements	190,998
Cost Capitalized Subsequent to Acquisition	24,590
Gross Carrying Amount, Land	25,135
Gross Carrying Amount, Building and Improvements	215,588
Accumulated Depreciation and Amortization	$ (36,352)
Year Built/ Renovated	1987
Date Acquired	Aug. 21, 2012
Life on which depreciation in latest income statements is computed	40 years
First & Main
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	14,697
Initial Cost, Building and Improvements	109,739
Cost Capitalized Subsequent to Acquisition	7,340
Gross Carrying Amount, Land	14,697
Gross Carrying Amount, Building and Improvements	117,079
Accumulated Depreciation and Amortization	$ (24,671)
Year Built/ Renovated	2010
Date Acquired	Mar. 11, 2011
Life on which depreciation in latest income statements is computed	40 years
The Land Mark at One Market
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	34,575
Initial Cost, Building and Improvements	141,196
Cost Capitalized Subsequent to Acquisition	9,080
Gross Carrying Amount, Land	34,575
Gross Carrying Amount, Building and Improvements	150,276
Accumulated Depreciation and Amortization	$ (35,214)
Year Built/ Renovated	1917/2000
Date Acquired	Jun. 30, 2010
Life on which depreciation in latest income statements is computed	40 years
Lloyd District Portfolio
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	18,660
Initial Cost, Building and Improvements	61,401
Cost Capitalized Subsequent to Acquisition	58,221
Gross Carrying Amount, Land	11,845
Gross Carrying Amount, Building and Improvements	126,437
Accumulated Depreciation and Amortization	$ (22,424)
Year Built/ Renovated	1940-2015
Date Acquired	Jul. 01, 2011
Life on which depreciation in latest income statements is computed	40 years
One Beach Street
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 21,900
Initial Cost, Land	15,332
Initial Cost, Building and Improvements	18,017
Cost Capitalized Subsequent to Acquisition	2,628
Gross Carrying Amount, Land	15,332
Gross Carrying Amount, Building and Improvements	20,645
Accumulated Depreciation and Amortization	$ (4,174)
Year Built/ Renovated	1924/1972/1987/1992
Date Acquired	Jan. 24, 2012
Life on which depreciation in latest income statements is computed	40 years
Solana Beach Corporate Centre I-II
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 10,721
Initial Cost, Land	7,111
Initial Cost, Building and Improvements	17,100
Cost Capitalized Subsequent to Acquisition	5,243
Gross Carrying Amount, Land	7,111
Gross Carrying Amount, Building and Improvements	22,343
Accumulated Depreciation and Amortization	$ (4,659)
Year Built/ Renovated	1982/2005
Date Acquired	Jan. 19, 2011
Life on which depreciation in latest income statements is computed	40 years
Solana Beach Corporate Centre III-IV
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	7,298
Initial Cost, Building and Improvements	27,887
Cost Capitalized Subsequent to Acquisition	2,697
Gross Carrying Amount, Land	7,298
Gross Carrying Amount, Building and Improvements	30,584
Accumulated Depreciation and Amortization	$ (6,680)
Year Built/ Renovated	1982/2005
Date Acquired	Jan. 19, 2011
Life on which depreciation in latest income statements is computed	40 years
Solana Beach Corporate Centre Land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 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
Year Built/ Renovated	N/A
Date Acquired	Jan. 19, 2011
Torrey Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	4,095
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	46,557
Gross Carrying Amount, Land	5,408
Gross Carrying Amount, Building and Improvements	45,244
Accumulated Depreciation and Amortization	$ (14,753)
Year Built/ Renovated	1996-1997/2014
Date Acquired	Jun. 06, 1989
Life on which depreciation in latest income statements is computed	40 years
Pacific North Court
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 20,023
Initial Cost, Land	3,263
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	22,929
Gross Carrying Amount, Land	4,309
Gross Carrying Amount, Building and Improvements	21,883
Accumulated Depreciation and Amortization	$ (10,942)
Year Built/ Renovated	1997-1998
Date Acquired	Jun. 06, 1989
Life on which depreciation in latest income statements is computed	40 years
Pacific South Court
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	3,285
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	34,139
Gross Carrying Amount, Land	4,226
Gross Carrying Amount, Building and Improvements	33,198
Accumulated Depreciation and Amortization	$ (13,134)
Year Built/ Renovated	1996-1997
Date Acquired	Jun. 06, 1989
Life on which depreciation in latest income statements is computed	40 years
Pacific VC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 6,764
Initial Cost, Land	1,413
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	9,451
Gross Carrying Amount, Land	2,148
Gross Carrying Amount, Building and Improvements	8,716
Accumulated Depreciation and Amortization	$ (4,557)
Year Built/ Renovated	1998/2000
Date Acquired	Jun. 06, 1989
Life on which depreciation in latest income statements is computed	40 years
Pacific Torrey Daycare
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	715
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	1,742
Gross Carrying Amount, Land	911
Gross Carrying Amount, Building and Improvements	1,546
Accumulated Depreciation and Amortization	$ (866)
Year Built/ Renovated	1996-1997
Date Acquired	Jun. 06, 1989
Life on which depreciation in latest income statements is computed	40 years
Torrey Reserve Building 6
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	7,960
Gross Carrying Amount, Land	682
Gross Carrying Amount, Building and Improvements	7,278
Accumulated Depreciation and Amortization	$ (1,184)
Year Built/ Renovated	2013
Date Acquired	Jun. 06, 1989
Life on which depreciation in latest income statements is computed	40 years
Torrey Reserve Building 5
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	3,508
Gross Carrying Amount, Land	1,017
Gross Carrying Amount, Building and Improvements	2,491
Accumulated Depreciation and Amortization	$ (153)
Year Built/ Renovated	2014
Date Acquired	Jun. 06, 1989
Life on which depreciation in latest income statements is computed	40 years
Torrey Reserve Building 13 & 14
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	13,937
Gross Carrying Amount, Land	2,188
Gross Carrying Amount, Building and Improvements	11,749
Accumulated Depreciation and Amortization	$ (605)
Year Built/ Renovated	2015
Date Acquired	Jun. 06, 1989
Life on which depreciation in latest income statements is computed	40 years
Imperial Beach Gardens
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	1,281
Initial Cost, Building and Improvements	4,820
Cost Capitalized Subsequent to Acquisition	4,571
Gross Carrying Amount, Land	1,281
Gross Carrying Amount, Building and Improvements	9,391
Accumulated Depreciation and Amortization	$ (7,867)
Year Built/ Renovated	1959/2008
Date Acquired	Jul. 31, 1985
Life on which depreciation in latest income statements is computed	30 years
Loma Palisades
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 73,744
Initial Cost, Land	14,000
Initial Cost, Building and Improvements	16,570
Cost Capitalized Subsequent to Acquisition	25,126
Gross Carrying Amount, Land	14,051
Gross Carrying Amount, Building and Improvements	41,645
Accumulated Depreciation and Amortization	$ (26,518)
Year Built/ Renovated	1958/2001-2008
Date Acquired	Jul. 20, 1990
Life on which depreciation in latest income statements is computed	30 years
Mariner's Point
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	2,744
Initial Cost, Building and Improvements	4,540
Cost Capitalized Subsequent to Acquisition	1,449
Gross Carrying Amount, Land	2,744
Gross Carrying Amount, Building and Improvements	5,989
Accumulated Depreciation and Amortization	$ (3,168)
Year Built/ Renovated	1986
Date Acquired	May 09, 2001
Life on which depreciation in latest income statements is computed	30 years
Santa Fe Park Rv Resort
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	401
Initial Cost, Building and Improvements	928
Cost Capitalized Subsequent to Acquisition	834
Gross Carrying Amount, Land	401
Gross Carrying Amount, Building and Improvements	1,762
Accumulated Depreciation and Amortization	$ (1,446)
Year Built/ Renovated	1971/2007-2008
Date Acquired	Jun. 01, 1979
Life on which depreciation in latest income statements is computed	30 years
Pacific Ridge Apartments
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	47,971
Initial Cost, Building and Improvements	178,497
Cost Capitalized Subsequent to Acquisition	144
Gross Carrying Amount, Land	47,971
Gross Carrying Amount, Building and Improvements	178,641
Accumulated Depreciation and Amortization	$ (4,823)
Year Built/ Renovated	2013
Date Acquired	Apr. 28, 2017
Life on which depreciation in latest income statements is computed	30 years
Hassalo on Eighth - Residential
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	177,642
Gross Carrying Amount, Land	6,220
Gross Carrying Amount, Building and Improvements	171,422
Accumulated Depreciation and Amortization	$ (13,654)
Year Built/ Renovated	2015
Date Acquired	Jul. 01, 2011
Life on which depreciation in latest income statements is computed	30 years
Waikiki Beach Walk - Retail
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	45,995
Initial Cost, Building and Improvements	74,943
Cost Capitalized Subsequent to Acquisition	441
Gross Carrying Amount, Land	45,995
Gross Carrying Amount, Building and Improvements	75,384
Accumulated Depreciation and Amortization	$ (16,406)
Year Built/ Renovated	2006
Date Acquired	Jan. 19, 2011
Life on which depreciation in latest income statements is computed	35 years
Waikiki Beach Walk Hotel
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	30,640
Initial Cost, Building and Improvements	60,029
Cost Capitalized Subsequent to Acquisition	1,460
Gross Carrying Amount, Land	30,640
Gross Carrying Amount, Building and Improvements	61,489
Accumulated Depreciation and Amortization	$ (16,214)
Year Built/ Renovated	2008/2014
Date Acquired	Jan. 19, 2011
Life on which depreciation in latest income statements is computed	35 years
Solana Beach Highway 101 Land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	7,847
Initial Cost, Building and Improvements	202
Cost Capitalized Subsequent to Acquisition	796
Gross Carrying Amount, Land	8,845
Gross Carrying Amount, Building and Improvements	0
Accumulated Depreciation and Amortization	$ (189)
Year Built/ Renovated	N/A
Date Acquired	Sep. 20, 2011
Torrey Point
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2017	$ 0
Initial Cost, Land	2,073
Initial Cost, Building and Improvements	741
Cost Capitalized Subsequent to Acquisition	39,152
Gross Carrying Amount, Land	6,145
Gross Carrying Amount, Building and Improvements	35,821
Accumulated Depreciation and Amortization	$ (964)
Year Built/ Renovated	N/A
Date Acquired	May 09, 1997