SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) apartment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2015 USD ($) ft²	Dec. 31, 2014 USD ($)
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance				$ 2,215,077,000
Initial cost [Abstract]
Land				2,484,492,000
Buildings and improvements				8,598,162,000
Costs capitalized subsequent to acquisition				1,248,815,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,522,842,000
Buildings and improvements				9,808,627,000
Total	$ 12,331,469,000			12,331,469,000
Accumulated depreciation	(1,564,806,000)	$ (1,254,886,000)	$ (1,081,517,000)	(1,949,892,000)	$ (1,564,806,000)
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Improvements	220,895,000	135,812,000	92,016,000
Acquisition of real estate	805,124,000	5,678,054,000	344,476,000
Development of real estate	307,083,000	19,751,000	14,111,000
Disposition of real estate	(246,314,000)	(32,693,000)	(40,518,000)
Balance at the end of year	12,331,469,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at beginning of year	(1,564,806,000)	(1,254,886,000)	(1,081,517,000)
Depreciation expense - Acquisitions	15,734,000	121,426,000	6,203,000
Depreciation expense - Discontinued operations	0	0	12,290,000
Depreciation expense - Rental properties	386,953,000	199,495,000	168,092,000
Dispositions	(17,601,000)	(11,001,000)	(13,216,000)
Balance at the end of year	(1,949,892,000)	(1,564,806,000)	(1,254,886,000)
Aggregate cost for federal income tax purpose	$ 8,900,000,000
BRE Properties, Inc. [Member]
Gross amount carried at close of period [Abstract]
Rental property expense					5,200,000,000
Encumbered Apartment Communities [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	17,085
Encumbrance				2,215,077,000
Initial cost [Abstract]
Land				797,144,000
Buildings and improvements				2,589,987,000
Costs capitalized subsequent to acquisition				482,664,000
Gross amount carried at close of period [Abstract]
Land and improvements				810,649,000
Buildings and improvements				3,059,146,000
Total	$ 3,869,795,000			3,869,795,000
Accumulated depreciation	(750,915,000)			(750,915,000)
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	3,869,795,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (750,915,000)
Encumbered Apartment Communities [Member] | Avondale at Warner Center [Member] | Woodland Hills, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	446
Encumbrance				44,470,000
Initial cost [Abstract]
Land				10,536,000
Buildings and improvements				24,522,000
Costs capitalized subsequent to acquisition				18,315,000
Gross amount carried at close of period [Abstract]
Land and improvements				10,601,000
Buildings and improvements				42,772,000
Total	$ 53,373,000			53,373,000
Accumulated depreciation	$ (26,174,000)			(26,174,000)
Date of construction	1970
Date acquired	Jan-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 53,373,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (26,174,000)
Encumbered Apartment Communities [Member] | Avondale at Warner Center [Member] | Woodland Hills, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Avondale at Warner Center [Member] | Woodland Hills, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Bel Air [Member] | San Ramon, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	462
Encumbrance				52,615,000
Initial cost [Abstract]
Land				12,105,000
Buildings and improvements				18,252,000
Costs capitalized subsequent to acquisition				31,563,000
Gross amount carried at close of period [Abstract]
Land and improvements				12,682,000
Buildings and improvements				49,238,000
Total	$ 61,920,000			61,920,000
Accumulated depreciation	$ (26,928,000)			(26,928,000)
Date of construction	1988
Date acquired	Jan-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 61,920,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (26,928,000)
Encumbered Apartment Communities [Member] | Bel Air [Member] | San Ramon, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Bel Air [Member] | San Ramon, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Belcarra [Member] | Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	296
Encumbrance				54,416,000
Initial cost [Abstract]
Land				21,725,000
Buildings and improvements				92,091,000
Costs capitalized subsequent to acquisition				253,000
Gross amount carried at close of period [Abstract]
Land and improvements				21,725,000
Buildings and improvements				92,344,000
Total	$ 114,069,000			114,069,000
Accumulated depreciation	$ (5,874,000)			(5,874,000)
Date of construction	2009
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 114,069,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,874,000)
Encumbered Apartment Communities [Member] | Belcarra [Member] | Bellevue, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | Belcarra [Member] | Bellevue, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Bella Villagio [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	231
Encumbrance				34,686,000
Initial cost [Abstract]
Land				17,247,000
Buildings and improvements				40,343,000
Costs capitalized subsequent to acquisition				2,271,000
Gross amount carried at close of period [Abstract]
Land and improvements				17,247,000
Buildings and improvements				42,614,000
Total	$ 59,861,000			59,861,000
Accumulated depreciation	$ (8,054,000)			(8,054,000)
Date of construction	2004
Date acquired	Sep-10
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 59,861,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (8,054,000)
Encumbered Apartment Communities [Member] | Bella Villagio [Member] | San Jose, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Bella Villagio [Member] | San Jose, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | BellCentre [Member] | Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	248
Encumbrance				40,485,000
Initial cost [Abstract]
Land				16,197,000
Buildings and improvements				67,207,000
Costs capitalized subsequent to acquisition				1,463,000
Gross amount carried at close of period [Abstract]
Land and improvements				16,197,000
Buildings and improvements				68,670,000
Total	$ 84,867,000			84,867,000
Accumulated depreciation	$ (4,461,000)			(4,461,000)
Date of construction	2001
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 84,867,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,461,000)
Encumbered Apartment Communities [Member] | BellCentre [Member] | Bellevue, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | BellCentre [Member] | Bellevue, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Belmont Station [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	275
Encumbrance				29,604,000
Initial cost [Abstract]
Land				8,100,000
Buildings and improvements				66,666,000
Costs capitalized subsequent to acquisition				5,034,000
Gross amount carried at close of period [Abstract]
Land and improvements				8,267,000
Buildings and improvements				71,533,000
Total	$ 79,800,000			79,800,000
Accumulated depreciation	$ (20,898,000)			(20,898,000)
Date of construction	2009
Date acquired	Mar-09
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 79,800,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (20,898,000)
Encumbered Apartment Communities [Member] | Belmont Station [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Belmont Station [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Bridgeport [Member] | Newark, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	184
Encumbrance				20,559,000
Initial cost [Abstract]
Land				1,608,000
Buildings and improvements				7,582,000
Costs capitalized subsequent to acquisition				8,801,000
Gross amount carried at close of period [Abstract]
Land and improvements				1,525,000
Buildings and improvements				16,466,000
Total	$ 17,991,000			17,991,000
Accumulated depreciation	$ (12,685,000)			(12,685,000)
Date of construction	1987
Date acquired	Jul-87
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 17,991,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (12,685,000)
Encumbered Apartment Communities [Member] | Bridgeport [Member] | Newark, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Bridgeport [Member] | Newark, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Brookside Oaks [Member] | Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	170
Encumbrance				18,897,000
Initial cost [Abstract]
Land				7,301,000
Buildings and improvements				16,310,000
Costs capitalized subsequent to acquisition				23,258,000
Gross amount carried at close of period [Abstract]
Land and improvements				10,328,000
Buildings and improvements				36,541,000
Total	$ 46,869,000			46,869,000
Accumulated depreciation	$ (16,270,000)			(16,270,000)
Date of construction	1973
Date acquired	Jun-00
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 46,869,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (16,270,000)
Encumbered Apartment Communities [Member] | Brookside Oaks [Member] | Sunnyvale, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Brookside Oaks [Member] | Sunnyvale, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Camino Ruiz Square [Member] | Camarillo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	160
Encumbrance				21,093,000
Initial cost [Abstract]
Land				6,871,000
Buildings and improvements				26,119,000
Costs capitalized subsequent to acquisition				1,431,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,931,000
Buildings and improvements				27,490,000
Total	$ 34,421,000			34,421,000
Accumulated depreciation	$ (8,515,000)			(8,515,000)
Date of construction	1990
Date acquired	Dec-06
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 34,421,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (8,515,000)
Encumbered Apartment Communities [Member] | Camino Ruiz Square [Member] | Camarillo, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Camino Ruiz Square [Member] | Camarillo, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Canyon Oaks [Member] | San Ramon, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	250
Encumbrance				27,553,000
Initial cost [Abstract]
Land				19,088,000
Buildings and improvements				44,473,000
Costs capitalized subsequent to acquisition				2,543,000
Gross amount carried at close of period [Abstract]
Land and improvements				19,088,000
Buildings and improvements				47,016,000
Total	$ 66,104,000			66,104,000
Accumulated depreciation	$ (14,036,000)			(14,036,000)
Date of construction	2005
Date acquired	May-07
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 66,104,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (14,036,000)
Encumbered Apartment Communities [Member] | Canyon Oaks [Member] | San Ramon, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Canyon Oaks [Member] | San Ramon, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Carmel Creek [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	348
Encumbrance				65,204,000
Initial cost [Abstract]
Land				26,842,000
Buildings and improvements				107,368,000
Costs capitalized subsequent to acquisition				2,474,000
Gross amount carried at close of period [Abstract]
Land and improvements				26,842,000
Buildings and improvements				109,842,000
Total	$ 136,684,000			136,684,000
Accumulated depreciation	$ (7,078,000)			(7,078,000)
Date of construction	2000
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 136,684,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,078,000)
Encumbered Apartment Communities [Member] | Carmel Creek [Member] | San Diego, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | Carmel Creek [Member] | San Diego, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | City View [Member] | Studio City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	572
Encumbrance				73,204,000
Initial cost [Abstract]
Land				9,883,000
Buildings and improvements				37,670,000
Costs capitalized subsequent to acquisition				23,281,000
Gross amount carried at close of period [Abstract]
Land and improvements				10,350,000
Buildings and improvements				60,484,000
Total	$ 70,834,000			70,834,000
Accumulated depreciation	$ (38,459,000)			(38,459,000)
Date of construction	1975
Date acquired	Mar-98
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 70,834,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (38,459,000)
Encumbered Apartment Communities [Member] | City View [Member] | Studio City, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | City View [Member] | Studio City, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Courtyard off Main [Member] | Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	110
Encumbrance				15,402,000
Initial cost [Abstract]
Land				7,465,000
Buildings and improvements				21,405,000
Costs capitalized subsequent to acquisition				2,927,000
Gross amount carried at close of period [Abstract]
Land and improvements				7,465,000
Buildings and improvements				24,332,000
Total	$ 31,797,000			31,797,000
Accumulated depreciation	$ (4,663,000)			(4,663,000)
Date of construction	2000
Date acquired	Oct-10
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 31,797,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,663,000)
Encumbered Apartment Communities [Member] | Courtyard off Main [Member] | Bellevue, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Courtyard off Main [Member] | Bellevue, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Domaine [Member] | Seattle, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	92
Encumbrance				15,149,000
Initial cost [Abstract]
Land				9,059,000
Buildings and improvements				27,177,000
Costs capitalized subsequent to acquisition				710,000
Gross amount carried at close of period [Abstract]
Land and improvements				9,059,000
Buildings and improvements				27,887,000
Total	$ 36,946,000			36,946,000
Accumulated depreciation	$ (3,130,000)			(3,130,000)
Date of construction	2009
Date acquired	Sep-12
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 36,946,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,130,000)
Encumbered Apartment Communities [Member] | Domaine [Member] | Seattle, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Domaine [Member] | Seattle, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Elevation [Member] | Redmond, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	158
Encumbrance				10,973,000
Initial cost [Abstract]
Land				4,758,000
Buildings and improvements				14,285,000
Costs capitalized subsequent to acquisition				5,740,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,757,000
Buildings and improvements				20,026,000
Total	$ 24,783,000			24,783,000
Accumulated depreciation	$ (5,319,000)			(5,319,000)
Date of construction	1986
Date acquired	Jun-10
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 24,783,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,319,000)
Encumbered Apartment Communities [Member] | Elevation [Member] | Redmond, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Elevation [Member] | Redmond, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Ellington at Bellevue [Member] | Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	220
Encumbrance				22,289,000
Initial cost [Abstract]
Land				15,066,000
Buildings and improvements				45,249,000
Costs capitalized subsequent to acquisition				1,322,000
Gross amount carried at close of period [Abstract]
Land and improvements				15,066,000
Buildings and improvements				46,571,000
Total	$ 61,637,000			61,637,000
Accumulated depreciation	$ (2,109,000)			(2,109,000)
Date of construction	1994
Date acquired	Jul-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 61,637,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,109,000)
Encumbered Apartment Communities [Member] | Ellington at Bellevue [Member] | Bellevue, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Ellington at Bellevue [Member] | Bellevue, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Fairhaven Treehouse [Member] | Santa Ana, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	164
Encumbrance				20,230,000
Initial cost [Abstract]
Land				2,626,000
Buildings and improvements				10,485,000
Costs capitalized subsequent to acquisition				6,040,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,957,000
Buildings and improvements				16,194,000
Total	$ 19,151,000			19,151,000
Accumulated depreciation	$ (7,714,000)			(7,714,000)
Date of construction	1970
Date acquired	Nov-01
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 19,151,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,714,000)
Encumbered Apartment Communities [Member] | Fairhaven Treehouse [Member] | Santa Ana, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Fairhaven Treehouse [Member] | Santa Ana, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Foster's Landing [Member] | Foster City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	490
Encumbrance				100,847,000
Initial cost [Abstract]
Land				61,714,000
Buildings and improvements				144,000,000
Costs capitalized subsequent to acquisition				5,685,000
Gross amount carried at close of period [Abstract]
Land and improvements				61,714,000
Buildings and improvements				149,685,000
Total	$ 211,399,000			211,399,000
Accumulated depreciation	$ (9,741,000)			(9,741,000)
Date of construction	1987
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 211,399,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (9,741,000)
Encumbered Apartment Communities [Member] | Foster's Landing [Member] | Foster City, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | Foster's Landing [Member] | Foster City, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Fountain At Riveroaks [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	226
Encumbrance				33,159,000
Initial cost [Abstract]
Land				26,046,000
Buildings and improvements				60,773,000
Costs capitalized subsequent to acquisition				590,000
Gross amount carried at close of period [Abstract]
Land and improvements				26,046,000
Buildings and improvements				61,363,000
Total	$ 87,409,000			87,409,000
Accumulated depreciation	$ (3,953,000)			(3,953,000)
Date of construction	1990
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 87,409,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,953,000)
Encumbered Apartment Communities [Member] | Fountain At Riveroaks [Member] | San Jose, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | Fountain At Riveroaks [Member] | San Jose, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Fountain Park [Member] | Playa Vista, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	705
Encumbrance				82,366,000
Initial cost [Abstract]
Land				25,073,000
Buildings and improvements				94,980,000
Costs capitalized subsequent to acquisition				29,371,000
Gross amount carried at close of period [Abstract]
Land and improvements				25,203,000
Buildings and improvements				124,221,000
Total	$ 149,424,000			149,424,000
Accumulated depreciation	$ (53,723,000)			(53,723,000)
Date of construction	2002
Date acquired	Feb-04
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 149,424,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (53,723,000)
Encumbered Apartment Communities [Member] | Fountain Park [Member] | Playa Vista, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Fountain Park [Member] | Playa Vista, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Hampton Place Hampton Court [Member] | Glendale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	215
Encumbrance				20,213,000
Initial cost [Abstract]
Land				6,695,000
Buildings and improvements				16,753,000
Costs capitalized subsequent to acquisition				13,193,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,733,000
Buildings and improvements				29,908,000
Total	$ 36,641,000			36,641,000
Accumulated depreciation	$ (13,448,000)			(13,448,000)
Date of construction	1970
Date acquired	Jun-99
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 36,641,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (13,448,000)
Encumbered Apartment Communities [Member] | Hampton Place Hampton Court [Member] | Glendale, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Hampton Place Hampton Court [Member] | Glendale, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Hidden Valley [Member] | Simi Valley, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	324
Encumbrance				29,262,000
Initial cost [Abstract]
Land				14,174,000
Buildings and improvements				34,065,000
Costs capitalized subsequent to acquisition				2,620,000
Gross amount carried at close of period [Abstract]
Land and improvements				9,674,000
Buildings and improvements				41,185,000
Total	$ 50,859,000			50,859,000
Accumulated depreciation	$ (15,871,000)			(15,871,000)
Date of construction	2004
Date acquired	Dec-04
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 50,859,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (15,871,000)
Encumbered Apartment Communities [Member] | Hidden Valley [Member] | Simi Valley, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Hidden Valley [Member] | Simi Valley, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Highlands at Wynhaven [Member] | Issaquah, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	333
Encumbrance				31,522,000
Initial cost [Abstract]
Land				16,271,000
Buildings and improvements				48,932,000
Costs capitalized subsequent to acquisition				8,001,000
Gross amount carried at close of period [Abstract]
Land and improvements				16,271,000
Buildings and improvements				56,933,000
Total	$ 73,204,000			73,204,000
Accumulated depreciation	$ (15,525,000)			(15,525,000)
Date of construction	2000
Date acquired	Aug-08
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 73,204,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (15,525,000)
Encumbered Apartment Communities [Member] | Highlands at Wynhaven [Member] | Issaquah, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Highlands at Wynhaven [Member] | Issaquah, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Highridge [Member] | Rancho Palos Verdes, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	255
Encumbrance				44,772,000
Initial cost [Abstract]
Land				5,419,000
Buildings and improvements				18,347,000
Costs capitalized subsequent to acquisition				29,555,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,073,000
Buildings and improvements				47,248,000
Total	$ 53,321,000			53,321,000
Accumulated depreciation	$ (26,591,000)			(26,591,000)
Date of construction	1972
Date acquired	May-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 53,321,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (26,591,000)
Encumbered Apartment Communities [Member] | Highridge [Member] | Rancho Palos Verdes, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Highridge [Member] | Rancho Palos Verdes, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Hillcrest Park [Member] | Newbury Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	608
Encumbrance				65,566,000
Initial cost [Abstract]
Land				15,318,000
Buildings and improvements				40,601,000
Costs capitalized subsequent to acquisition				17,368,000
Gross amount carried at close of period [Abstract]
Land and improvements				15,755,000
Buildings and improvements				57,532,000
Total	$ 73,287,000			73,287,000
Accumulated depreciation	$ (32,302,000)			(32,302,000)
Date of construction	1973
Date acquired	Mar-98
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 73,287,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (32,302,000)
Encumbered Apartment Communities [Member] | Hillcrest Park [Member] | Newbury Park, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Hillcrest Park [Member] | Newbury Park, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Huntington Breakers [Member] | Huntington Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	342
Encumbrance				36,648,000
Initial cost [Abstract]
Land				9,306,000
Buildings and improvements				22,720,000
Costs capitalized subsequent to acquisition				17,026,000
Gross amount carried at close of period [Abstract]
Land and improvements				9,315,000
Buildings and improvements				39,737,000
Total	$ 49,052,000			49,052,000
Accumulated depreciation	$ (19,480,000)			(19,480,000)
Date of construction	1984
Date acquired	Oct-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 49,052,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (19,480,000)
Encumbered Apartment Communities [Member] | Huntington Breakers [Member] | Huntington Beach, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Huntington Breakers [Member] | Huntington Beach, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Inglenook Court [Member] | Bothell, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	224
Encumbrance				8,174,000
Initial cost [Abstract]
Land				3,467,000
Buildings and improvements				7,881,000
Costs capitalized subsequent to acquisition				6,686,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,474,000
Buildings and improvements				14,560,000
Total	$ 18,034,000			18,034,000
Accumulated depreciation	$ (10,524,000)			(10,524,000)
Date of construction	1985
Date acquired	Oct-94
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 18,034,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (10,524,000)
Encumbered Apartment Communities [Member] | Inglenook Court [Member] | Bothell, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Inglenook Court [Member] | Bothell, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Magnolia Square [Member] | Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	188
Encumbrance				17,363,000
Initial cost [Abstract]
Land				8,190,000
Buildings and improvements				24,736,000
Costs capitalized subsequent to acquisition				14,591,000
Gross amount carried at close of period [Abstract]
Land and improvements				8,191,000
Buildings and improvements				39,326,000
Total	$ 47,517,000			47,517,000
Accumulated depreciation	$ (13,145,000)			(13,145,000)
Date of construction	1969
Date acquired	Sep-07
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 47,517,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (13,145,000)
Encumbered Apartment Communities [Member] | Magnolia Square [Member] | Sunnyvale, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Magnolia Square [Member] | Sunnyvale, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Mill Creek at Windermere [Member] | San Ramon, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	400
Encumbrance				47,344,000
Initial cost [Abstract]
Land				29,551,000
Buildings and improvements				69,032,000
Costs capitalized subsequent to acquisition				3,447,000
Gross amount carried at close of period [Abstract]
Land and improvements				29,551,000
Buildings and improvements				72,479,000
Total	$ 102,030,000			102,030,000
Accumulated depreciation	$ (20,639,000)			(20,639,000)
Date of construction	2005
Date acquired	Sep-07
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 102,030,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (20,639,000)
Encumbered Apartment Communities [Member] | Mill Creek at Windermere [Member] | San Ramon, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Mill Creek at Windermere [Member] | San Ramon, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Mirabella [Member] | Marina Del Rey, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	188
Encumbrance				43,518,000
Initial cost [Abstract]
Land				6,180,000
Buildings and improvements				26,673,000
Costs capitalized subsequent to acquisition				14,103,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,270,000
Buildings and improvements				40,686,000
Total	$ 46,956,000			46,956,000
Accumulated depreciation	$ (19,485,000)			(19,485,000)
Date of construction	2000
Date acquired	May-00
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 46,956,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (19,485,000)
Encumbered Apartment Communities [Member] | Mirabella [Member] | Marina Del Rey, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Mirabella [Member] | Marina Del Rey, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Montarosa [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	472
Encumbrance				62,724,000
Initial cost [Abstract]
Land				26,697,000
Buildings and improvements				106,787,000
Costs capitalized subsequent to acquisition				2,210,000
Gross amount carried at close of period [Abstract]
Land and improvements				26,697,000
Buildings and improvements				108,997,000
Total	$ 135,694,000			135,694,000
Accumulated depreciation	$ (7,005,000)			(7,005,000)
Date of construction	1990
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 135,694,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,005,000)
Encumbered Apartment Communities [Member] | Montarosa [Member] | San Diego, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | Montarosa [Member] | San Diego, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Montebello [Member] | Kirkland, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	248
Encumbrance				27,353,000
Initial cost [Abstract]
Land				13,857,000
Buildings and improvements				41,575,000
Costs capitalized subsequent to acquisition				3,735,000
Gross amount carried at close of period [Abstract]
Land and improvements				13,858,000
Buildings and improvements				45,309,000
Total	$ 59,167,000			59,167,000
Accumulated depreciation	$ (5,903,000)			(5,903,000)
Date of construction	1996
Date acquired	Jul-12
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 59,167,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,903,000)
Encumbered Apartment Communities [Member] | Montebello [Member] | Kirkland, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Montebello [Member] | Kirkland, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Montejo [Member] | Garden Grove, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	124
Encumbrance				15,232,000
Initial cost [Abstract]
Land				1,925,000
Buildings and improvements				7,685,000
Costs capitalized subsequent to acquisition				2,822,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,194,000
Buildings and improvements				10,238,000
Total	$ 12,432,000			12,432,000
Accumulated depreciation	$ (4,974,000)			(4,974,000)
Date of construction	1974
Date acquired	Nov-01
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 12,432,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,974,000)
Encumbered Apartment Communities [Member] | Montejo [Member] | Garden Grove, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Montejo [Member] | Garden Grove, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Park Highland [Member] | Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	250
Encumbrance				26,556,000
Initial cost [Abstract]
Land				9,391,000
Buildings and improvements				38,224,000
Costs capitalized subsequent to acquisition				8,053,000
Gross amount carried at close of period [Abstract]
Land and improvements				9,391,000
Buildings and improvements				46,277,000
Total	$ 55,668,000			55,668,000
Accumulated depreciation	$ (2,743,000)			(2,743,000)
Date of construction	1993
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 55,668,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,743,000)
Encumbered Apartment Communities [Member] | Park Highland [Member] | Bellevue, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | Park Highland [Member] | Bellevue, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Park Hill at Issaquah [Member] | Issaquah, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	245
Encumbrance				27,802,000
Initial cost [Abstract]
Land				7,284,000
Buildings and improvements				21,937,000
Costs capitalized subsequent to acquisition				5,979,000
Gross amount carried at close of period [Abstract]
Land and improvements				7,284,000
Buildings and improvements				27,916,000
Total	$ 35,200,000			35,200,000
Accumulated depreciation	$ (10,277,000)			(10,277,000)
Date of construction	1999
Date acquired	Feb-99
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 35,200,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (10,277,000)
Encumbered Apartment Communities [Member] | Park Hill at Issaquah [Member] | Issaquah, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Park Hill at Issaquah [Member] | Issaquah, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Pathways [Member] | Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	296
Encumbrance				36,325,000
Initial cost [Abstract]
Land				4,083,000
Buildings and improvements				16,757,000
Costs capitalized subsequent to acquisition				19,274,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,239,000
Buildings and improvements				33,875,000
Total	$ 40,114,000			40,114,000
Accumulated depreciation	$ (25,965,000)			(25,965,000)
Date of construction	1975
Date acquired	Feb-91
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 40,114,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (25,965,000)
Encumbered Apartment Communities [Member] | Pathways [Member] | Long Beach, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Pathways [Member] | Long Beach, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Piedmont [Member] | Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	396
Encumbrance				46,635,000
Initial cost [Abstract]
Land				19,848,000
Buildings and improvements				59,606,000
Costs capitalized subsequent to acquisition				4,502,000
Gross amount carried at close of period [Abstract]
Land and improvements				19,848,000
Buildings and improvements				64,108,000
Total	$ 83,956,000			83,956,000
Accumulated depreciation	$ (3,638,000)			(3,638,000)
Date of construction	1969
Date acquired	May-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 83,956,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,638,000)
Encumbered Apartment Communities [Member] | Piedmont [Member] | Bellevue, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Piedmont [Member] | Bellevue, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Pinnacle at Fullerton [Member] | Fullerton, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	192
Encumbrance				27,578,000
Initial cost [Abstract]
Land				11,019,000
Buildings and improvements				45,932,000
Costs capitalized subsequent to acquisition				858,000
Gross amount carried at close of period [Abstract]
Land and improvements				11,019,000
Buildings and improvements				46,790,000
Total	$ 57,809,000			57,809,000
Accumulated depreciation	$ (2,980,000)			(2,980,000)
Date of construction	2004
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 57,809,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,980,000)
Encumbered Apartment Communities [Member] | Pinnacle at Fullerton [Member] | Fullerton, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | Pinnacle at Fullerton [Member] | Fullerton, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Pinnacle on Lake Washington [Member] | Renton, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	180
Encumbrance				18,724,000
Initial cost [Abstract]
Land				7,760,000
Buildings and improvements				31,041,000
Costs capitalized subsequent to acquisition				449,000
Gross amount carried at close of period [Abstract]
Land and improvements				7,760,000
Buildings and improvements				31,490,000
Total	$ 39,250,000			39,250,000
Accumulated depreciation	$ (2,027,000)			(2,027,000)
Date of construction	2001
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 39,250,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,027,000)
Encumbered Apartment Communities [Member] | Pinnacle on Lake Washington [Member] | Renton, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | Pinnacle on Lake Washington [Member] | Renton, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Pinnacle at MacArthur Ranch [Member] | Santa Ana, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	253
Encumbrance				39,859,000
Initial cost [Abstract]
Land				15,810,000
Buildings and improvements				66,401,000
Costs capitalized subsequent to acquisition				1,343,000
Gross amount carried at close of period [Abstract]
Land and improvements				15,810,000
Buildings and improvements				67,744,000
Total	$ 83,554,000			83,554,000
Accumulated depreciation	$ (4,306,000)			(4,306,000)
Date of construction	2002
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 83,554,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,306,000)
Encumbered Apartment Communities [Member] | Pinnacle at MacArthur Ranch [Member] | Santa Ana, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | Pinnacle at MacArthur Ranch [Member] | Santa Ana, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Pinnacle at Otay Ranch [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	364
Encumbrance				40,970,000
Initial cost [Abstract]
Land				17,023,000
Buildings and improvements				68,093,000
Costs capitalized subsequent to acquisition				766,000
Gross amount carried at close of period [Abstract]
Land and improvements				17,023,000
Buildings and improvements				68,859,000
Total	$ 85,882,000			85,882,000
Accumulated depreciation	$ (4,442,000)			(4,442,000)
Date of construction	2001
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 85,882,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,442,000)
Encumbered Apartment Communities [Member] | Pinnacle at Otay Ranch [Member] | San Diego, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | Pinnacle at Otay Ranch [Member] | San Diego, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Pinnacle at Talega [Member] | Irvine, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	362
Encumbrance				46,489,000
Initial cost [Abstract]
Land				19,292,000
Buildings and improvements				77,168,000
Costs capitalized subsequent to acquisition				993,000
Gross amount carried at close of period [Abstract]
Land and improvements				19,292,000
Buildings and improvements				78,161,000
Total	$ 97,453,000			97,453,000
Accumulated depreciation	$ (5,014,000)			(5,014,000)
Date of construction	2002
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 97,453,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,014,000)
Encumbered Apartment Communities [Member] | Pinnacle at Talega [Member] | Irvine, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | Pinnacle at Talega [Member] | Irvine, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Stevenson Place [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	200
Encumbrance				20,980,000
Initial cost [Abstract]
Land				996,000
Buildings and improvements				5,582,000
Costs capitalized subsequent to acquisition				9,323,000
Gross amount carried at close of period [Abstract]
Land and improvements				1,001,000
Buildings and improvements				14,900,000
Total	$ 15,901,000			15,901,000
Accumulated depreciation	$ (10,244,000)			(10,244,000)
Date of construction	1971
Date acquired	Apr-83
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 15,901,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (10,244,000)
Encumbered Apartment Communities [Member] | Stevenson Place [Member] | Fremont, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Stevenson Place [Member] | Fremont, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Summerhill Park [Member] | Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	100
Encumbrance				13,032,000
Initial cost [Abstract]
Land				2,654,000
Buildings and improvements				4,918,000
Costs capitalized subsequent to acquisition				9,769,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,656,000
Buildings and improvements				14,685,000
Total	$ 17,341,000			17,341,000
Accumulated depreciation	$ (5,764,000)			(5,764,000)
Date of construction	1988
Date acquired	Sep-88
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 17,341,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,764,000)
Encumbered Apartment Communities [Member] | Summerhill Park [Member] | Sunnyvale, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Summerhill Park [Member] | Sunnyvale, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | The Audrey at Belltown [Member] | Seattle, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	137
Encumbrance				22,099,000
Initial cost [Abstract]
Land				9,228,000
Buildings and improvements				36,911,000
Costs capitalized subsequent to acquisition				185,000
Gross amount carried at close of period [Abstract]
Land and improvements				9,228,000
Buildings and improvements				37,096,000
Total	$ 46,324,000			46,324,000
Accumulated depreciation	$ (2,373,000)			(2,373,000)
Date of construction	1992
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 46,324,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,373,000)
Encumbered Apartment Communities [Member] | The Audrey at Belltown [Member] | Seattle, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | The Audrey at Belltown [Member] | Seattle, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Avery, The [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	121
Encumbrance				9,985,000
Initial cost [Abstract]
Land				6,964,000
Buildings and improvements				29,922,000
Costs capitalized subsequent to acquisition				16,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,964,000
Buildings and improvements				29,938,000
Total	$ 36,902,000			36,902,000
Accumulated depreciation	$ (1,786,000)			(1,786,000)
Date of construction	2014
Date acquired	Mar-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 36,902,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (1,786,000)
Encumbered Apartment Communities [Member] | Avery, The [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Avery, The [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Barkley, The [Member] | Anaheim, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	161
Encumbrance				15,951,000
Initial cost [Abstract]
Land				0
Buildings and improvements				8,520,000
Costs capitalized subsequent to acquisition				5,561,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,353,000
Buildings and improvements				11,728,000
Total	$ 14,081,000			14,081,000
Accumulated depreciation	$ (6,090,000)			(6,090,000)
Date of construction	1984
Date acquired	Apr-00
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 14,081,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (6,090,000)
Encumbered Apartment Communities [Member] | Barkley, The [Member] | Anaheim, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Barkley, The [Member] | Anaheim, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | The Bernard [Member] | Seattle, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	63
Encumbrance				9,141,000
Initial cost [Abstract]
Land				3,699,000
Buildings and improvements				11,345,000
Costs capitalized subsequent to acquisition				231,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,689,000
Buildings and improvements				11,586,000
Total	$ 15,275,000			15,275,000
Accumulated depreciation	$ (1,706,000)			(1,706,000)
Date of construction	2008
Date acquired	Sep-11
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 15,275,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (1,706,000)
Encumbered Apartment Communities [Member] | The Bernard [Member] | Seattle, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | The Bernard [Member] | Seattle, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Carlyle, The [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	132
Encumbrance				21,889,000
Initial cost [Abstract]
Land				3,954,000
Buildings and improvements				15,277,000
Costs capitalized subsequent to acquisition				10,317,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,801,000
Buildings and improvements				23,747,000
Total	$ 29,548,000			29,548,000
Accumulated depreciation	$ (11,968,000)			(11,968,000)
Date of construction	2000
Date acquired	Apr-00
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 29,548,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (11,968,000)
Encumbered Apartment Communities [Member] | Carlyle, The [Member] | San Jose, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Carlyle, The [Member] | San Jose, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | The Dylan [Member] | West Hollywood, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	184
Encumbrance				59,592,000
Initial cost [Abstract]
Land				19,984,000
Buildings and improvements				82,286,000
Costs capitalized subsequent to acquisition				16,000
Gross amount carried at close of period [Abstract]
Land and improvements				19,984,000
Buildings and improvements				82,302,000
Total	$ 102,286,000			102,286,000
Accumulated depreciation	$ (2,637,000)			(2,637,000)
Date of construction	2015
Date acquired	Mar-15
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 102,286,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,637,000)
Encumbered Apartment Communities [Member] | The Dylan [Member] | West Hollywood, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | The Dylan [Member] | West Hollywood, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Elliot, The [Member] | Mukilteo, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	301
Encumbrance				10,628,000
Initial cost [Abstract]
Land				2,498,000
Buildings and improvements				10,595,000
Costs capitalized subsequent to acquisition				14,940,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,824,000
Buildings and improvements				25,209,000
Total	$ 28,033,000			28,033,000
Accumulated depreciation	$ (14,705,000)			(14,705,000)
Date of construction	1981
Date acquired	Jan-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 28,033,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (14,705,000)
Encumbered Apartment Communities [Member] | Elliot, The [Member] | Mukilteo, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Elliot, The [Member] | Mukilteo, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | The Huntington [Member] | Huntington Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	276
Encumbrance				30,890,000
Initial cost [Abstract]
Land				10,374,000
Buildings and improvements				41,495,000
Costs capitalized subsequent to acquisition				3,381,000
Gross amount carried at close of period [Abstract]
Land and improvements				10,374,000
Buildings and improvements				44,876,000
Total	$ 55,250,000			55,250,000
Accumulated depreciation	$ (5,765,000)			(5,765,000)
Date of construction	1975
Date acquired	Jun-12
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 55,250,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,765,000)
Encumbered Apartment Communities [Member] | The Huntington [Member] | Huntington Beach, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | The Huntington [Member] | Huntington Beach, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | The Huxley [Member] | West Hollywood, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	187
Encumbrance				54,272,000
Initial cost [Abstract]
Land				19,362,000
Buildings and improvements				75,641,000
Costs capitalized subsequent to acquisition				40,000
Gross amount carried at close of period [Abstract]
Land and improvements				19,362,000
Buildings and improvements				75,681,000
Total	$ 95,043,000			95,043,000
Accumulated depreciation	$ (2,486,000)			(2,486,000)
Date of construction	2014
Date acquired	Mar-15
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 95,043,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,486,000)
Encumbered Apartment Communities [Member] | The Huxley [Member] | West Hollywood, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | The Huxley [Member] | West Hollywood, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | The Landing at Jack London Square [Member] | Oakland, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	282
Encumbrance				54,771,000
Initial cost [Abstract]
Land				33,554,000
Buildings and improvements				78,292,000
Costs capitalized subsequent to acquisition				2,966,000
Gross amount carried at close of period [Abstract]
Land and improvements				33,554,000
Buildings and improvements				81,258,000
Total	$ 114,812,000			114,812,000
Accumulated depreciation	$ (5,336,000)			(5,336,000)
Date of construction	2001
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 114,812,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,336,000)
Encumbered Apartment Communities [Member] | The Landing at Jack London Square [Member] | Oakland, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | The Landing at Jack London Square [Member] | Oakland, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Montclaire, The [Member] | Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	390
Encumbrance				44,921,000
Initial cost [Abstract]
Land				4,842,000
Buildings and improvements				19,776,000
Costs capitalized subsequent to acquisition				20,602,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,997,000
Buildings and improvements				40,223,000
Total	$ 45,220,000			45,220,000
Accumulated depreciation	$ (33,694,000)			(33,694,000)
Date of construction	1973
Date acquired	Dec-88
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 45,220,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (33,694,000)
Encumbered Apartment Communities [Member] | Montclaire, The [Member] | Sunnyvale, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Montclaire, The [Member] | Sunnyvale, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | The Palms at Laguna Niguel [Member] | Laguna Niguel, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	460
Encumbrance				57,032,000
Initial cost [Abstract]
Land				23,584,000
Buildings and improvements				94,334,000
Costs capitalized subsequent to acquisition				1,634,000
Gross amount carried at close of period [Abstract]
Land and improvements				23,584,000
Buildings and improvements				95,968,000
Total	$ 119,552,000			119,552,000
Accumulated depreciation	$ (6,171,000)			(6,171,000)
Date of construction	1988
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 119,552,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (6,171,000)
Encumbered Apartment Communities [Member] | The Palms at Laguna Niguel [Member] | Laguna Niguel, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | The Palms at Laguna Niguel [Member] | Laguna Niguel, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Palisades, The [Member] | Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	192
Encumbrance				20,138,000
Initial cost [Abstract]
Land				1,560,000
Buildings and improvements				6,242,000
Costs capitalized subsequent to acquisition				11,658,000
Gross amount carried at close of period [Abstract]
Land and improvements				1,565,000
Buildings and improvements				17,895,000
Total	$ 19,460,000			19,460,000
Accumulated depreciation	$ (13,831,000)			(13,831,000)
Date of construction	1977
Date acquired	May-90
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 19,460,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (13,831,000)
Encumbered Apartment Communities [Member] | Palisades, The [Member] | Bellevue, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Palisades, The [Member] | Bellevue, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Waterford, The [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	238
Encumbrance				30,689,000
Initial cost [Abstract]
Land				11,808,000
Buildings and improvements				24,500,000
Costs capitalized subsequent to acquisition				13,536,000
Gross amount carried at close of period [Abstract]
Land and improvements				15,165,000
Buildings and improvements				34,679,000
Total	$ 49,844,000			49,844,000
Accumulated depreciation	$ (17,641,000)			(17,641,000)
Date of construction	2000
Date acquired	Jun-00
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 49,844,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (17,641,000)
Encumbered Apartment Communities [Member] | Waterford, The [Member] | San Jose, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Waterford, The [Member] | San Jose, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Tierra Vista [Member] | Oxnard, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	404
Encumbrance				53,948,000
Initial cost [Abstract]
Land				13,652,000
Buildings and improvements				53,336,000
Costs capitalized subsequent to acquisition				4,226,000
Gross amount carried at close of period [Abstract]
Land and improvements				13,661,000
Buildings and improvements				57,553,000
Total	$ 71,214,000			71,214,000
Accumulated depreciation	$ (23,033,000)			(23,033,000)
Date of construction	2001
Date acquired	Jan-01
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 71,214,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (23,033,000)
Encumbered Apartment Communities [Member] | Tierra Vista [Member] | Oxnard, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Tierra Vista [Member] | Oxnard, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Valley Park [Member] | Fountain Valley [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	160
Encumbrance				25,856,000
Initial cost [Abstract]
Land				3,361,000
Buildings and improvements				13,420,000
Costs capitalized subsequent to acquisition				5,269,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,761,000
Buildings and improvements				18,289,000
Total	$ 22,050,000			22,050,000
Accumulated depreciation	$ (8,190,000)			(8,190,000)
Date of construction	1969
Date acquired	Nov-01
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 22,050,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (8,190,000)
Encumbered Apartment Communities [Member] | Valley Park [Member] | Fountain Valley [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Valley Park [Member] | Fountain Valley [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Villa Angelina [Member] | Placentia, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	256
Encumbrance				31,908,000
Initial cost [Abstract]
Land				4,498,000
Buildings and improvements				17,962,000
Costs capitalized subsequent to acquisition				6,539,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,962,000
Buildings and improvements				24,037,000
Total	$ 28,999,000			28,999,000
Accumulated depreciation	$ (11,020,000)			(11,020,000)
Date of construction	1970
Date acquired	Nov-01
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 28,999,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (11,020,000)
Encumbered Apartment Communities [Member] | Villa Angelina [Member] | Placentia, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Villa Angelina [Member] | Placentia, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Villa Grenada [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	270
Encumbrance				61,057,000
Initial cost [Abstract]
Land				38,299,000
Buildings and improvements				89,365,000
Costs capitalized subsequent to acquisition				326,000
Gross amount carried at close of period [Abstract]
Land and improvements				38,299,000
Buildings and improvements				89,691,000
Total	$ 127,990,000			127,990,000
Accumulated depreciation	$ (5,789,000)			(5,789,000)
Date of construction	2010
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 127,990,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,789,000)
Encumbered Apartment Communities [Member] | Villa Grenada [Member] | Santa Clara, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Encumbered Apartment Communities [Member] | Villa Grenada [Member] | Santa Clara, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Wandering Creek [Member] | Kent, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	156
Encumbrance				5,209,000
Initial cost [Abstract]
Land				1,285,000
Buildings and improvements				4,980,000
Costs capitalized subsequent to acquisition				3,790,000
Gross amount carried at close of period [Abstract]
Land and improvements				1,296,000
Buildings and improvements				8,759,000
Total	$ 10,055,000			10,055,000
Accumulated depreciation	$ (6,313,000)			(6,313,000)
Date of construction	1986
Date acquired	Nov-95
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 10,055,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (6,313,000)
Encumbered Apartment Communities [Member] | Wandering Creek [Member] | Kent, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Wandering Creek [Member] | Kent, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Encumbered Apartment Communities [Member] | Wilshire Promenade [Member] | Fullerton, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	149
Encumbrance				17,259,000
Initial cost [Abstract]
Land				3,118,000
Buildings and improvements				7,385,000
Costs capitalized subsequent to acquisition				7,693,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,797,000
Buildings and improvements				14,399,000
Total	$ 18,196,000			18,196,000
Accumulated depreciation	$ (8,305,000)			(8,305,000)
Date of construction	1992
Date acquired	Jan-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 18,196,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (8,305,000)
Encumbered Apartment Communities [Member] | Wilshire Promenade [Member] | Fullerton, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Encumbered Apartment Communities [Member] | Wilshire Promenade [Member] | Fullerton, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	31,451
Initial cost [Abstract]
Land				1,667,597,000
Buildings and improvements				5,970,356,000
Costs capitalized subsequent to acquisition				754,076,000
Gross amount carried at close of period [Abstract]
Land and improvements				1,691,213,000
Buildings and improvements				6,700,816,000
Total	$ 8,392,029,000			8,392,029,000
Accumulated depreciation	(1,177,395,000)			(1,177,395,000)
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	8,392,029,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (1,177,395,000)
Unencumbered Apartment Communities [Member] | Esplanade [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	278
Initial cost [Abstract]
Land				18,170,000
Buildings and improvements				40,086,000
Costs capitalized subsequent to acquisition				9,874,000
Gross amount carried at close of period [Abstract]
Land and improvements				18,429,000
Buildings and improvements				49,701,000
Total	$ 68,130,000			68,130,000
Accumulated depreciation	$ (19,358,000)			(19,358,000)
Date of construction	2002
Date acquired	Apr-11
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 68,130,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (19,358,000)
Unencumbered Apartment Communities [Member] | Esplanade [Member] | San Jose, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Esplanade [Member] | San Jose, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Fairwood Pond [Member] | Renton, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	194
Initial cost [Abstract]
Land				5,296,000
Buildings and improvements				15,564,000
Costs capitalized subsequent to acquisition				2,490,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,297,000
Buildings and improvements				18,053,000
Total	$ 23,350,000			23,350,000
Accumulated depreciation	$ (7,407,000)			(7,407,000)
Date of construction	1997
Date acquired	Oct-04
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 23,350,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,407,000)
Unencumbered Apartment Communities [Member] | Fairwood Pond [Member] | Renton, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Fairwood Pond [Member] | Renton, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Park Viridian Mello Roos [Member] | Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	320
Initial cost [Abstract]
Land				15,894,000
Buildings and improvements				63,574,000
Costs capitalized subsequent to acquisition				1,116,000
Gross amount carried at close of period [Abstract]
Land and improvements				15,894,000
Buildings and improvements				64,690,000
Total	$ 80,584,000			80,584,000
Accumulated depreciation	$ (4,137,000)			(4,137,000)
Date of construction	2008
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 80,584,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,137,000)
Unencumbered Apartment Communities [Member] | Park Viridian Mello Roos [Member] | Irvine, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Park Viridian Mello Roos [Member] | Irvine, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Stonehedge Village [Member] | Bothell, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	196
Initial cost [Abstract]
Land				3,167,000
Buildings and improvements				12,603,000
Costs capitalized subsequent to acquisition				5,739,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,201,000
Buildings and improvements				18,308,000
Total	$ 21,509,000			21,509,000
Accumulated depreciation	$ (11,102,000)			(11,102,000)
Date of construction	1986
Date acquired	Oct-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 21,509,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (11,102,000)
Unencumbered Apartment Communities [Member] | Stonehedge Village [Member] | Bothell, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Stonehedge Village [Member] | Bothell, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Eighth And Hope [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	290
Initial cost [Abstract]
Land				29,279,000
Buildings and improvements				169,350,000
Costs capitalized subsequent to acquisition				441,000
Gross amount carried at close of period [Abstract]
Land and improvements				29,279,000
Buildings and improvements				169,791,000
Total	$ 199,070,000			199,070,000
Accumulated depreciation	$ (5,544,000)			(5,544,000)
Date of construction	2014
Date acquired	Feb-15
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 199,070,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,544,000)
Unencumbered Apartment Communities [Member] | Eighth And Hope [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Eighth And Hope [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Alessio [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	624
Initial cost [Abstract]
Land				32,136,000
Buildings and improvements				128,543,000
Costs capitalized subsequent to acquisition				3,105,000
Gross amount carried at close of period [Abstract]
Land and improvements				32,136,000
Buildings and improvements				131,648,000
Total	$ 163,784,000			163,784,000
Accumulated depreciation	$ (8,564,000)			(8,564,000)
Date of construction	2001
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 163,784,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (8,564,000)
Unencumbered Apartment Communities [Member] | Alessio [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Alessio [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Allegro [Member] | Valley Village, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	97
Initial cost [Abstract]
Land				5,869,000
Buildings and improvements				23,977,000
Costs capitalized subsequent to acquisition				1,573,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,869,000
Buildings and improvements				25,550,000
Total	$ 31,419,000			31,419,000
Accumulated depreciation	$ (6,656,000)			(6,656,000)
Date of construction	2010
Date acquired	Oct-10
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 31,419,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (6,656,000)
Unencumbered Apartment Communities [Member] | Allegro [Member] | Valley Village, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Allegro [Member] | Valley Village, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Allure [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	194
Initial cost [Abstract]
Land				11,923,000
Buildings and improvements				47,690,000
Costs capitalized subsequent to acquisition				280,000
Gross amount carried at close of period [Abstract]
Land and improvements				11,923,000
Buildings and improvements				47,970,000
Total	$ 59,893,000			59,893,000
Accumulated depreciation	$ (3,074,000)			(3,074,000)
Date of construction	2002
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 59,893,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,074,000)
Unencumbered Apartment Communities [Member] | Allure [Member] | San Diego, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Allure [Member] | San Diego, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Alpine Village [Member] | Alpine, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	301
Initial cost [Abstract]
Land				4,967,000
Buildings and improvements				19,728,000
Costs capitalized subsequent to acquisition				6,551,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,982,000
Buildings and improvements				26,264,000
Total	$ 31,246,000			31,246,000
Accumulated depreciation	$ (11,485,000)			(11,485,000)
Date of construction	1971
Date acquired	Dec-02
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 31,246,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (11,485,000)
Unencumbered Apartment Communities [Member] | Alpine Village [Member] | Alpine, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Alpine Village [Member] | Alpine, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Anavia [Member] | Anaheim, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	250
Initial cost [Abstract]
Land				15,925,000
Buildings and improvements				63,712,000
Costs capitalized subsequent to acquisition				6,340,000
Gross amount carried at close of period [Abstract]
Land and improvements				15,925,000
Buildings and improvements				70,052,000
Total	$ 85,977,000			85,977,000
Accumulated depreciation	$ (11,955,000)			(11,955,000)
Date of construction	2009
Date acquired	Dec-10
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 85,977,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (11,955,000)
Unencumbered Apartment Communities [Member] | Anavia [Member] | Anaheim, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Anavia [Member] | Anaheim, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Annaliese [Member] | Seattle, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	56
Initial cost [Abstract]
Land				4,727,000
Buildings and improvements				14,229,000
Costs capitalized subsequent to acquisition				330,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,726,000
Buildings and improvements				14,560,000
Total	$ 19,286,000			19,286,000
Accumulated depreciation	$ (1,452,000)			(1,452,000)
Date of construction	2009
Date acquired	Jan-13
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 19,286,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (1,452,000)
Unencumbered Apartment Communities [Member] | Annaliese [Member] | Seattle, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Annaliese [Member] | Seattle, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Apex [Member] | Milpitas, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	366
Initial cost [Abstract]
Land				44,240,000
Buildings and improvements				103,251,000
Costs capitalized subsequent to acquisition				1,104,000
Gross amount carried at close of period [Abstract]
Land and improvements				44,240,000
Buildings and improvements				104,355,000
Total	$ 148,595,000			148,595,000
Accumulated depreciation	$ (4,635,000)			(4,635,000)
Date of construction	2014
Date acquired	Aug-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 148,595,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,635,000)
Unencumbered Apartment Communities [Member] | Apex [Member] | Milpitas, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Apex [Member] | Milpitas, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Aqua at Marina Del Rey [Member] | Marina Del Rey, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	500
Initial cost [Abstract]
Land				58,442,000
Buildings and improvements				175,326,000
Costs capitalized subsequent to acquisition				4,965,000
Gross amount carried at close of period [Abstract]
Land and improvements				58,442,000
Buildings and improvements				180,291,000
Total	$ 238,733,000			238,733,000
Accumulated depreciation	$ (11,632,000)			(11,632,000)
Date of construction	2001
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 238,733,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (11,632,000)
Unencumbered Apartment Communities [Member] | Aqua at Marina Del Rey [Member] | Marina Del Rey, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Aqua at Marina Del Rey [Member] | Marina Del Rey, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Ascent [Member] | Kirkland, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	90
Initial cost [Abstract]
Land				3,924,000
Buildings and improvements				11,862,000
Costs capitalized subsequent to acquisition				1,669,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,924,000
Buildings and improvements				13,531,000
Total	$ 17,455,000			17,455,000
Accumulated depreciation	$ (1,734,000)			(1,734,000)
Date of construction	1988
Date acquired	Oct-12
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 17,455,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (1,734,000)
Unencumbered Apartment Communities [Member] | Ascent [Member] | Kirkland, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Ascent [Member] | Kirkland, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Avant [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	440
Initial cost [Abstract]
Land				32,379,000
Buildings and improvements				137,940,000
Costs capitalized subsequent to acquisition				261,000
Gross amount carried at close of period [Abstract]
Land and improvements				32,379,000
Buildings and improvements				138,201,000
Total	$ 170,580,000			170,580,000
Accumulated depreciation	$ (1,631,000)			(1,631,000)
Date of construction	2014
Date acquired	Jun-15
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 170,580,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (1,631,000)
Unencumbered Apartment Communities [Member] | Avant [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Avant [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Avenue 64 [Member] | Emeryville, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	224
Initial cost [Abstract]
Land				27,235,000
Buildings and improvements				64,403,000
Costs capitalized subsequent to acquisition				8,486,000
Gross amount carried at close of period [Abstract]
Land and improvements				27,235,000
Buildings and improvements				72,889,000
Total	$ 100,124,000			100,124,000
Accumulated depreciation	$ (4,257,000)			(4,257,000)
Date of construction	2007
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 100,124,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,257,000)
Unencumbered Apartment Communities [Member] | Avenue 64 [Member] | Emeryville, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Avenue 64 [Member] | Emeryville, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Aviara [Member] | Mercer Island, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	166
Initial cost [Abstract]
Land				0
Buildings and improvements				49,813,000
Costs capitalized subsequent to acquisition				136,000
Gross amount carried at close of period [Abstract]
Land and improvements				0
Buildings and improvements				49,949,000
Total	$ 49,949,000			49,949,000
Accumulated depreciation	$ (3,596,000)			(3,596,000)
Date of construction	2013
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 49,949,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,596,000)
Unencumbered Apartment Communities [Member] | Aviara [Member] | Mercer Island, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Aviara [Member] | Mercer Island, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Axis 2300 [Member] | Irvine, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	115
Initial cost [Abstract]
Land				5,405,000
Buildings and improvements				33,585,000
Costs capitalized subsequent to acquisition				1,127,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,405,000
Buildings and improvements				34,712,000
Total	$ 40,117,000			40,117,000
Accumulated depreciation	$ (8,800,000)			(8,800,000)
Date of construction	2010
Date acquired	Aug-10
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 40,117,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (8,800,000)
Unencumbered Apartment Communities [Member] | Axis 2300 [Member] | Irvine, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Axis 2300 [Member] | Irvine, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Bellerive [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	63
Initial cost [Abstract]
Land				5,401,000
Buildings and improvements				21,803,000
Costs capitalized subsequent to acquisition				765,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,401,000
Buildings and improvements				22,568,000
Total	$ 27,969,000			27,969,000
Accumulated depreciation	$ (4,455,000)			(4,455,000)
Date of construction	2011
Date acquired	Aug-11
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 27,969,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,455,000)
Unencumbered Apartment Communities [Member] | Bellerive [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Bellerive [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Belmont Terrace [Member] | Campbell, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	71
Initial cost [Abstract]
Land				4,446,000
Buildings and improvements				10,290,000
Costs capitalized subsequent to acquisition				4,399,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,473,000
Buildings and improvements				14,662,000
Total	$ 19,135,000			19,135,000
Accumulated depreciation	$ (5,372,000)			(5,372,000)
Date of construction	1974
Date acquired	Oct-06
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 19,135,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,372,000)
Unencumbered Apartment Communities [Member] | Belmont Terrace [Member] | Campbell, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Belmont Terrace [Member] | Campbell, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Bennett Lofts [Member] | San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	165
Initial cost [Abstract]
Land				21,771,000
Buildings and improvements				50,800,000
Costs capitalized subsequent to acquisition				25,515,000
Gross amount carried at close of period [Abstract]
Land and improvements				28,371,000
Buildings and improvements				69,715,000
Total	$ 98,086,000			98,086,000
Accumulated depreciation	$ (7,560,000)			(7,560,000)
Date of construction	2004
Date acquired	Dec-12
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 98,086,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,560,000)
Unencumbered Apartment Communities [Member] | Bennett Lofts [Member] | San Francisco, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Bennett Lofts [Member] | San Francisco, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Bernardo Crest [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	216
Initial cost [Abstract]
Land				10,802,000
Buildings and improvements				43,209,000
Costs capitalized subsequent to acquisition				1,302,000
Gross amount carried at close of period [Abstract]
Land and improvements				10,802,000
Buildings and improvements				44,511,000
Total	$ 55,313,000			55,313,000
Accumulated depreciation	$ (2,837,000)			(2,837,000)
Date of construction	1988
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 55,313,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,837,000)
Unencumbered Apartment Communities [Member] | Bernardo Crest [Member] | San Diego, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Bernardo Crest [Member] | San Diego, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Bonita Cedars [Member] | Bonita, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	120
Initial cost [Abstract]
Land				2,496,000
Buildings and improvements				9,913,000
Costs capitalized subsequent to acquisition				2,187,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,503,000
Buildings and improvements				12,093,000
Total	$ 14,596,000			14,596,000
Accumulated depreciation	$ (5,574,000)			(5,574,000)
Date of construction	1983
Date acquired	Dec-02
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 14,596,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,574,000)
Unencumbered Apartment Communities [Member] | Bonita Cedars [Member] | Bonita, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Bonita Cedars [Member] | Bonita, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Boulevard [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	172
Initial cost [Abstract]
Land				3,520,000
Buildings and improvements				8,182,000
Costs capitalized subsequent to acquisition				10,888,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,580,000
Buildings and improvements				19,010,000
Total	$ 22,590,000			22,590,000
Accumulated depreciation	$ (13,725,000)			(13,725,000)
Date of construction	1978
Date acquired	Jan-96
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 22,590,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (13,725,000)
Unencumbered Apartment Communities [Member] | Boulevard [Member] | Fremont, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Boulevard [Member] | Fremont, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Bridle Trails [Member] | Kirkland, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	108
Initial cost [Abstract]
Land				1,500,000
Buildings and improvements				5,930,000
Costs capitalized subsequent to acquisition				5,577,000
Gross amount carried at close of period [Abstract]
Land and improvements				1,531,000
Buildings and improvements				11,476,000
Total	$ 13,007,000			13,007,000
Accumulated depreciation	$ (7,107,000)			(7,107,000)
Date of construction	1986
Date acquired	Oct-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 13,007,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,107,000)
Unencumbered Apartment Communities [Member] | Bridle Trails [Member] | Kirkland, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Bridle Trails [Member] | Kirkland, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Brighton Ridge [Member] | Renton, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	264
Initial cost [Abstract]
Land				2,623,000
Buildings and improvements				10,800,000
Costs capitalized subsequent to acquisition				4,342,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,656,000
Buildings and improvements				15,109,000
Total	$ 17,765,000			17,765,000
Accumulated depreciation	$ (9,599,000)			(9,599,000)
Date of construction	1986
Date acquired	Dec-96
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 17,765,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (9,599,000)
Unencumbered Apartment Communities [Member] | Brighton Ridge [Member] | Renton, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Brighton Ridge [Member] | Renton, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Bristol Commons [Member] | Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	188
Initial cost [Abstract]
Land				5,278,000
Buildings and improvements				11,853,000
Costs capitalized subsequent to acquisition				6,978,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,293,000
Buildings and improvements				18,816,000
Total	$ 24,109,000			24,109,000
Accumulated depreciation	$ (9,909,000)			(9,909,000)
Date of construction	1989
Date acquired	Jan-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 24,109,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (9,909,000)
Unencumbered Apartment Communities [Member] | Bristol Commons [Member] | Sunnyvale, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Bristol Commons [Member] | Sunnyvale, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | 416 on Broadway [Member] | Glendale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	115
Initial cost [Abstract]
Land				8,557,000
Buildings and improvements				34,235,000
Costs capitalized subsequent to acquisition				1,905,000
Gross amount carried at close of period [Abstract]
Land and improvements				8,557,000
Buildings and improvements				36,140,000
Total	$ 44,697,000			44,697,000
Accumulated depreciation	$ (6,542,000)			(6,542,000)
Date of construction	2009
Date acquired	Dec-10
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 44,697,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (6,542,000)
Unencumbered Apartment Communities [Member] | 416 on Broadway [Member] | Glendale, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | 416 on Broadway [Member] | Glendale, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Bunker Hill [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	456
Initial cost [Abstract]
Land				11,498,000
Buildings and improvements				27,871,000
Costs capitalized subsequent to acquisition				43,175,000
Gross amount carried at close of period [Abstract]
Land and improvements				11,639,000
Buildings and improvements				70,905,000
Total	$ 82,544,000			82,544,000
Accumulated depreciation	$ (24,680,000)			(24,680,000)
Date of construction	1968
Date acquired	Mar-98
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 82,544,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (24,680,000)
Unencumbered Apartment Communities [Member] | Bunker Hill [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Bunker Hill [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Camarillo Oaks [Member] | Camarillo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	564
Initial cost [Abstract]
Land				10,953,000
Buildings and improvements				25,254,000
Costs capitalized subsequent to acquisition				4,813,000
Gross amount carried at close of period [Abstract]
Land and improvements				11,075,000
Buildings and improvements				29,945,000
Total	$ 41,020,000			41,020,000
Accumulated depreciation	$ (19,180,000)			(19,180,000)
Date of construction	1985
Date acquired	Jul-96
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 41,020,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (19,180,000)
Unencumbered Apartment Communities [Member] | Camarillo Oaks [Member] | Camarillo, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Camarillo Oaks [Member] | Camarillo, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Cambridge Park [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	320
Initial cost [Abstract]
Land				18,185,000
Buildings and improvements				72,739,000
Costs capitalized subsequent to acquisition				945,000
Gross amount carried at close of period [Abstract]
Land and improvements				18,185,000
Buildings and improvements				73,684,000
Total	$ 91,869,000			91,869,000
Accumulated depreciation	$ (4,770,000)			(4,770,000)
Date of construction	1998
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 91,869,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,770,000)
Unencumbered Apartment Communities [Member] | Cambridge Park [Member] | San Diego, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Cambridge Park [Member] | San Diego, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Candlewood North [Member] | Northridge, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	189
Initial cost [Abstract]
Land				7,267,000
Buildings and improvements				29,068,000
Costs capitalized subsequent to acquisition				1,298,000
Gross amount carried at close of period [Abstract]
Land and improvements				7,267,000
Buildings and improvements				30,366,000
Total	$ 37,633,000			37,633,000
Accumulated depreciation	$ (1,954,000)			(1,954,000)
Date of construction	1964
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 37,633,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (1,954,000)
Unencumbered Apartment Communities [Member] | Candlewood North [Member] | Northridge, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Candlewood North [Member] | Northridge, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Canyon Pointe [Member] | Bothell, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	250
Initial cost [Abstract]
Land				4,692,000
Buildings and improvements				18,288,000
Costs capitalized subsequent to acquisition				6,156,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,693,000
Buildings and improvements				24,443,000
Total	$ 29,136,000			29,136,000
Accumulated depreciation	$ (10,351,000)			(10,351,000)
Date of construction	1990
Date acquired	Oct-03
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 29,136,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (10,351,000)
Unencumbered Apartment Communities [Member] | Canyon Pointe [Member] | Bothell, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Canyon Pointe [Member] | Bothell, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Capri at Sunny Hills [Member] | Fullerton, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	100
Initial cost [Abstract]
Land				3,337,000
Buildings and improvements				13,320,000
Costs capitalized subsequent to acquisition				8,354,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,048,000
Buildings and improvements				20,963,000
Total	$ 25,011,000			25,011,000
Accumulated depreciation	$ (10,424,000)			(10,424,000)
Date of construction	1961
Date acquired	Sep-01
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 25,011,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (10,424,000)
Unencumbered Apartment Communities [Member] | Capri at Sunny Hills [Member] | Fullerton, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Capri at Sunny Hills [Member] | Fullerton, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Carnel Landing [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	356
Initial cost [Abstract]
Land				16,725,000
Buildings and improvements				66,901,000
Costs capitalized subsequent to acquisition				2,694,000
Gross amount carried at close of period [Abstract]
Land and improvements				16,725,000
Buildings and improvements				69,595,000
Total	$ 86,320,000			86,320,000
Accumulated depreciation	$ (4,478,000)			(4,478,000)
Date of construction	1989
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 86,320,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,478,000)
Unencumbered Apartment Communities [Member] | Carnel Landing [Member] | San Diego, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Carnel Landing [Member] | San Diego, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Carnel Summit [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	246
Initial cost [Abstract]
Land				14,968,000
Buildings and improvements				59,871,000
Costs capitalized subsequent to acquisition				1,076,000
Gross amount carried at close of period [Abstract]
Land and improvements				14,968,000
Buildings and improvements				60,947,000
Total	$ 75,915,000			75,915,000
Accumulated depreciation	$ (3,887,000)			(3,887,000)
Date of construction	1989
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 75,915,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,887,000)
Unencumbered Apartment Communities [Member] | Carnel Summit [Member] | San Diego, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Carnel Summit [Member] | San Diego, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Castle Creek [Member] | San Mateo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	216
Initial cost [Abstract]
Land				4,149,000
Buildings and improvements				16,028,000
Costs capitalized subsequent to acquisition				2,644,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,833,000
Buildings and improvements				17,988,000
Total	$ 22,821,000			22,821,000
Accumulated depreciation	$ (11,526,000)			(11,526,000)
Date of construction	1988
Date acquired	Dec-98
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 22,821,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (11,526,000)
Unencumbered Apartment Communities [Member] | Castle Creek [Member] | San Mateo, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Castle Creek [Member] | San Mateo, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Catalina Gardens [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	128
Initial cost [Abstract]
Land				6,714,000
Buildings and improvements				26,856,000
Costs capitalized subsequent to acquisition				503,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,714,000
Buildings and improvements				27,359,000
Total	$ 34,073,000			34,073,000
Accumulated depreciation	$ (1,748,000)			(1,748,000)
Date of construction	1987
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 34,073,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (1,748,000)
Unencumbered Apartment Communities [Member] | Catalina Gardens [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Catalina Gardens [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | CBC Apartments [Member] | Santa Barbara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	239
Initial cost [Abstract]
Land				11,841,000
Buildings and improvements				45,320,000
Costs capitalized subsequent to acquisition				5,525,000
Gross amount carried at close of period [Abstract]
Land and improvements				11,906,000
Buildings and improvements				50,780,000
Total	$ 62,686,000			62,686,000
Accumulated depreciation	$ (19,106,000)			(19,106,000)
Date of construction	1962
Date acquired	Jan-06
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 62,686,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (19,106,000)
Unencumbered Apartment Communities [Member] | CBC Apartments [Member] | Santa Barbara, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | CBC Apartments [Member] | Santa Barbara, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Cedar Terrace [Member] | Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	180
Initial cost [Abstract]
Land				5,543,000
Buildings and improvements				16,442,000
Costs capitalized subsequent to acquisition				5,020,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,652,000
Buildings and improvements				21,353,000
Total	$ 27,005,000			27,005,000
Accumulated depreciation	$ (8,662,000)			(8,662,000)
Date of construction	1984
Date acquired	Jan-05
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 27,005,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (8,662,000)
Unencumbered Apartment Communities [Member] | Cedar Terrace [Member] | Bellevue, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Cedar Terrace [Member] | Bellevue, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | CentrePointe [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	224
Initial cost [Abstract]
Land				3,405,000
Buildings and improvements				7,743,000
Costs capitalized subsequent to acquisition				19,503,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,442,000
Buildings and improvements				27,209,000
Total	$ 30,651,000			30,651,000
Accumulated depreciation	$ (11,507,000)			(11,507,000)
Date of construction	1974
Date acquired	Jun-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 30,651,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (11,507,000)
Unencumbered Apartment Communities [Member] | CentrePointe [Member] | San Diego, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | CentrePointe [Member] | San Diego, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Chestnut Street [Member] | Santa Cruz, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	96
Initial cost [Abstract]
Land				6,582,000
Buildings and improvements				15,689,000
Costs capitalized subsequent to acquisition				1,262,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,582,000
Buildings and improvements				16,951,000
Total	$ 23,533,000			23,533,000
Accumulated depreciation	$ (4,527,000)			(4,527,000)
Date of construction	2002
Date acquired	Jul-08
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 23,533,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,527,000)
Unencumbered Apartment Communities [Member] | Chestnut Street [Member] | Santa Cruz, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Chestnut Street [Member] | Santa Cruz, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Collins On Pine [Member] | Seattle, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	76
Initial cost [Abstract]
Land				7,276,000
Buildings and improvements				22,226,000
Costs capitalized subsequent to acquisition				78,000
Gross amount carried at close of period [Abstract]
Land and improvements				7,276,000
Buildings and improvements				22,304,000
Total	$ 29,580,000			29,580,000
Accumulated depreciation	$ (1,215,000)			(1,215,000)
Date of construction	2013
Date acquired	May-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 29,580,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (1,215,000)
Unencumbered Apartment Communities [Member] | Collins On Pine [Member] | Seattle, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Collins On Pine [Member] | Seattle, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Corbella at Juanita Bay [Member] | Kirkland, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	169
Initial cost [Abstract]
Land				5,801,000
Buildings and improvements				17,415,000
Costs capitalized subsequent to acquisition				2,133,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,801,000
Buildings and improvements				19,548,000
Total	$ 25,349,000			25,349,000
Accumulated depreciation	$ (3,663,000)			(3,663,000)
Date of construction	1978
Date acquired	Nov-10
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 25,349,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,663,000)
Unencumbered Apartment Communities [Member] | Corbella at Juanita Bay [Member] | Kirkland, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Corbella at Juanita Bay [Member] | Kirkland, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Cortesia at Santa Margarita [Member] | Rancho Santa, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	308
Initial cost [Abstract]
Land				13,912,000
Buildings and improvements				55,649,000
Costs capitalized subsequent to acquisition				719,000
Gross amount carried at close of period [Abstract]
Land and improvements				13,912,000
Buildings and improvements				56,368,000
Total	$ 70,280,000			70,280,000
Accumulated depreciation	$ (3,625,000)			(3,625,000)
Date of construction	1999
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 70,280,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,625,000)
Unencumbered Apartment Communities [Member] | Cortesia at Santa Margarita [Member] | Rancho Santa, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Cortesia at Santa Margarita [Member] | Rancho Santa, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Country Villas [Member] | Oceanside, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	180
Initial cost [Abstract]
Land				4,174,000
Buildings and improvements				16,583,000
Costs capitalized subsequent to acquisition				3,332,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,187,000
Buildings and improvements				19,902,000
Total	$ 24,089,000			24,089,000
Accumulated depreciation	$ (9,274,000)			(9,274,000)
Date of construction	1976
Date acquired	Dec-02
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 24,089,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (9,274,000)
Unencumbered Apartment Communities [Member] | Country Villas [Member] | Oceanside, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Country Villas [Member] | Oceanside, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Deer Valley [Member] | San Rafael, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	171
Initial cost [Abstract]
Land				21,478,000
Buildings and improvements				50,116,000
Costs capitalized subsequent to acquisition				1,023,000
Gross amount carried at close of period [Abstract]
Land and improvements				21,478,000
Buildings and improvements				51,139,000
Total	$ 72,617,000			72,617,000
Accumulated depreciation	$ (3,329,000)			(3,329,000)
Date of construction	1996
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 72,617,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,329,000)
Unencumbered Apartment Communities [Member] | Deer Valley [Member] | San Rafael, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Deer Valley [Member] | San Rafael, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Delano/Bon Terra [Member] | Redmond, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	126
Initial cost [Abstract]
Land				7,470,000
Buildings and improvements				22,511,000
Costs capitalized subsequent to acquisition				978,000
Gross amount carried at close of period [Abstract]
Land and improvements				7,470,000
Buildings and improvements				23,489,000
Total	$ 30,959,000			30,959,000
Accumulated depreciation	$ (3,265,000)			(3,265,000)
Date of construction	2005
Date acquired	Dec-11
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 30,959,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,265,000)
Unencumbered Apartment Communities [Member] | Delano/Bon Terra [Member] | Redmond, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Delano/Bon Terra [Member] | Redmond, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Devonshire [Member] | Hemet, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	276
Initial cost [Abstract]
Land				3,470,000
Buildings and improvements				13,786,000
Costs capitalized subsequent to acquisition				3,236,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,482,000
Buildings and improvements				17,010,000
Total	$ 20,492,000			20,492,000
Accumulated depreciation	$ (7,891,000)			(7,891,000)
Date of construction	1988
Date acquired	Dec-02
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 20,492,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,891,000)
Unencumbered Apartment Communities [Member] | Devonshire [Member] | Hemet, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Devonshire [Member] | Hemet, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Domain [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	379
Initial cost [Abstract]
Land				23,848,000
Buildings and improvements				95,394,000
Costs capitalized subsequent to acquisition				799,000
Gross amount carried at close of period [Abstract]
Land and improvements				23,848,000
Buildings and improvements				96,193,000
Total	$ 120,041,000			120,041,000
Accumulated depreciation	$ (6,868,000)			(6,868,000)
Date of construction	2013
Date acquired	Nov-13
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 120,041,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (6,868,000)
Unencumbered Apartment Communities [Member] | Domain [Member] | San Diego, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Domain [Member] | San Diego, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Emerald Pointe [Member] | Diamond Bar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	160
Initial cost [Abstract]
Land				8,458,000
Buildings and improvements				33,832,000
Costs capitalized subsequent to acquisition				813,000
Gross amount carried at close of period [Abstract]
Land and improvements				8,458,000
Buildings and improvements				34,645,000
Total	$ 43,103,000			43,103,000
Accumulated depreciation	$ (2,235,000)			(2,235,000)
Date of construction	1989
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 43,103,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,235,000)
Unencumbered Apartment Communities [Member] | Emerald Pointe [Member] | Diamond Bar, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Emerald Pointe [Member] | Diamond Bar, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Emerald Ridge [Member] | Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	180
Initial cost [Abstract]
Land				3,449,000
Buildings and improvements				7,801,000
Costs capitalized subsequent to acquisition				3,500,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,449,000
Buildings and improvements				11,301,000
Total	$ 14,750,000			14,750,000
Accumulated depreciation	$ (8,307,000)			(8,307,000)
Date of construction	1987
Date acquired	Nov-94
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 14,750,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (8,307,000)
Unencumbered Apartment Communities [Member] | Emerald Ridge [Member] | Bellevue, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Emerald Ridge [Member] | Bellevue, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Enso [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	183
Initial cost [Abstract]
Land				21,397,000
Buildings and improvements				71,135,000
Costs capitalized subsequent to acquisition				2,000
Gross amount carried at close of period [Abstract]
Land and improvements				21,397,000
Buildings and improvements				71,137,000
Total	$ 92,534,000			92,534,000
Accumulated depreciation	$ (102,000)			(102,000)
Date of construction	2014
Date acquired	Dec-15
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 92,534,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (102,000)
Unencumbered Apartment Communities [Member] | Enso [Member] | San Jose, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Enso [Member] | San Jose, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Essex Skyline at MacAuthur Place [Member] | Santa Ana, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	349
Initial cost [Abstract]
Land				21,537,000
Buildings and improvements				146,099,000
Costs capitalized subsequent to acquisition				2,862,000
Gross amount carried at close of period [Abstract]
Land and improvements				21,537,000
Buildings and improvements				148,961,000
Total	$ 170,498,000			170,498,000
Accumulated depreciation	$ (18,766,000)			(18,766,000)
Date of construction	2008
Date acquired	Apr-12
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 170,498,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (18,766,000)
Unencumbered Apartment Communities [Member] | Essex Skyline at MacAuthur Place [Member] | Santa Ana, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Essex Skyline at MacAuthur Place [Member] | Santa Ana, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Evergreen Heights [Member] | Kirkland, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	200
Initial cost [Abstract]
Land				3,566,000
Buildings and improvements				13,395,000
Costs capitalized subsequent to acquisition				4,566,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,649,000
Buildings and improvements				17,878,000
Total	$ 21,527,000			21,527,000
Accumulated depreciation	$ (10,945,000)			(10,945,000)
Date of construction	1990
Date acquired	Jun-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 21,527,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (10,945,000)
Unencumbered Apartment Communities [Member] | Evergreen Heights [Member] | Kirkland, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Evergreen Heights [Member] | Kirkland, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Fairways [Member] | Newport Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	74
Initial cost [Abstract]
Land				0
Buildings and improvements				7,850,000
Costs capitalized subsequent to acquisition				6,731,000
Gross amount carried at close of period [Abstract]
Land and improvements				9,000
Buildings and improvements				14,572,000
Total	$ 14,581,000			14,581,000
Accumulated depreciation	$ (7,135,000)			(7,135,000)
Date of construction	1972
Date acquired	Jun-99
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 14,581,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,135,000)
Unencumbered Apartment Communities [Member] | Fairways [Member] | Newport Beach, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Fairways [Member] | Newport Beach, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Foothill Commons [Member] | Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	394
Initial cost [Abstract]
Land				2,435,000
Buildings and improvements				9,821,000
Costs capitalized subsequent to acquisition				36,446,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,440,000
Buildings and improvements				46,262,000
Total	$ 48,702,000			48,702,000
Accumulated depreciation	$ (30,270,000)			(30,270,000)
Date of construction	1978
Date acquired	Mar-90
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 48,702,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (30,270,000)
Unencumbered Apartment Communities [Member] | Foothill Commons [Member] | Bellevue, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Foothill Commons [Member] | Bellevue, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Foothill Gardens/Twin Creeks [Member] | San Ramon, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	176
Initial cost [Abstract]
Land				5,875,000
Buildings and improvements				13,992,000
Costs capitalized subsequent to acquisition				7,919,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,964,000
Buildings and improvements				21,822,000
Total	$ 27,786,000			27,786,000
Accumulated depreciation	$ (12,293,000)			(12,293,000)
Date of construction	1985
Date acquired	Feb-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 27,786,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (12,293,000)
Unencumbered Apartment Communities [Member] | Foothill Gardens/Twin Creeks [Member] | San Ramon, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Foothill Gardens/Twin Creeks [Member] | San Ramon, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Forest View [Member] | Renton, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	192
Initial cost [Abstract]
Land				3,731,000
Buildings and improvements				14,530,000
Costs capitalized subsequent to acquisition				1,798,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,731,000
Buildings and improvements				16,328,000
Total	$ 20,059,000			20,059,000
Accumulated depreciation	$ (6,991,000)			(6,991,000)
Date of construction	1998
Date acquired	Oct-03
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 20,059,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (6,991,000)
Unencumbered Apartment Communities [Member] | Forest View [Member] | Renton, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Forest View [Member] | Renton, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Fountain Court [Member] | Seattle, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	320
Initial cost [Abstract]
Land				6,702,000
Buildings and improvements				27,306,000
Costs capitalized subsequent to acquisition				10,209,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,585,000
Buildings and improvements				37,632,000
Total	$ 44,217,000			44,217,000
Accumulated depreciation	$ (19,053,000)			(19,053,000)
Date of construction	2000
Date acquired	Mar-00
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 44,217,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (19,053,000)
Unencumbered Apartment Communities [Member] | Fountain Court [Member] | Seattle, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Fountain Court [Member] | Seattle, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Fourth & U [Member] | Berkeley, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	171
Initial cost [Abstract]
Land				8,879,000
Buildings and improvements				52,351,000
Costs capitalized subsequent to acquisition				2,396,000
Gross amount carried at close of period [Abstract]
Land and improvements				8,879,000
Buildings and improvements				54,747,000
Total	$ 63,626,000			63,626,000
Accumulated depreciation	$ (11,966,000)			(11,966,000)
Date of construction	2010
Date acquired	Apr-10
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 63,626,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (11,966,000)
Unencumbered Apartment Communities [Member] | Fourth & U [Member] | Berkeley, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Fourth & U [Member] | Berkeley, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Fox Plaza [Member] | San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	443
Initial cost [Abstract]
Land				39,731,000
Buildings and improvements				92,706,000
Costs capitalized subsequent to acquisition				12,668,000
Gross amount carried at close of period [Abstract]
Land and improvements				39,731,000
Buildings and improvements				105,374,000
Total	$ 145,105,000			145,105,000
Accumulated depreciation	$ (10,314,000)			(10,314,000)
Date of construction	1968
Date acquired	Feb-13
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 145,105,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (10,314,000)
Unencumbered Apartment Communities [Member] | Fox Plaza [Member] | San Francisco, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Fox Plaza [Member] | San Francisco, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Hillsborough Park [Member] | La Habra, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	235
Initial cost [Abstract]
Land				6,291,000
Buildings and improvements				15,455,000
Costs capitalized subsequent to acquisition				2,182,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,272,000
Buildings and improvements				17,656,000
Total	$ 23,928,000			23,928,000
Accumulated depreciation	$ (9,602,000)			(9,602,000)
Date of construction	1999
Date acquired	Sep-99
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 23,928,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (9,602,000)
Unencumbered Apartment Communities [Member] | Hillsborough Park [Member] | La Habra, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Hillsborough Park [Member] | La Habra, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Hillsdale Garden Apartments [Member] | San Mateo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	697
Initial cost [Abstract]
Land				22,000,000
Buildings and improvements				94,681,000
Costs capitalized subsequent to acquisition				20,672,000
Gross amount carried at close of period [Abstract]
Land and improvements				22,000,000
Buildings and improvements				115,353,000
Total	$ 137,353,000			137,353,000
Accumulated depreciation	$ (38,841,000)			(38,841,000)
Date of construction	1948
Date acquired	Sep-06
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 137,353,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (38,841,000)
Unencumbered Apartment Communities [Member] | Hillsdale Garden Apartments [Member] | San Mateo, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Hillsdale Garden Apartments [Member] | San Mateo, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Hope Ranch Collection [Member] | Santa Barbara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	108
Initial cost [Abstract]
Land				4,078,000
Buildings and improvements				16,877,000
Costs capitalized subsequent to acquisition				2,507,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,208,000
Buildings and improvements				19,254,000
Total	$ 23,462,000			23,462,000
Accumulated depreciation	$ (5,586,000)			(5,586,000)
Date of construction	1965
Date acquired	Mar-07
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 23,462,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,586,000)
Unencumbered Apartment Communities [Member] | Hope Ranch Collection [Member] | Santa Barbara, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Hope Ranch Collection [Member] | Santa Barbara, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Jefferson at Hollywood [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	270
Initial cost [Abstract]
Land				19,054,000
Buildings and improvements				89,321,000
Costs capitalized subsequent to acquisition				1,182,000
Gross amount carried at close of period [Abstract]
Land and improvements				19,054,000
Buildings and improvements				90,503,000
Total	$ 109,557,000			109,557,000
Accumulated depreciation	$ (5,745,000)			(5,745,000)
Date of construction	2010
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 109,557,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,745,000)
Unencumbered Apartment Communities [Member] | Jefferson at Hollywood [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Jefferson at Hollywood [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Joule [Member] | Seattle, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	295
Initial cost [Abstract]
Land				14,558,000
Buildings and improvements				69,417,000
Costs capitalized subsequent to acquisition				3,614,000
Gross amount carried at close of period [Abstract]
Land and improvements				14,558,000
Buildings and improvements				73,031,000
Total	$ 87,589,000			87,589,000
Accumulated depreciation	$ (16,387,000)			(16,387,000)
Date of construction	2010
Date acquired	Mar-10
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 87,589,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (16,387,000)
Unencumbered Apartment Communities [Member] | Joule [Member] | Seattle, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Joule [Member] | Seattle, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | 1000 Kiely [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	121
Initial cost [Abstract]
Land				9,359,000
Buildings and improvements				21,845,000
Costs capitalized subsequent to acquisition				6,725,000
Gross amount carried at close of period [Abstract]
Land and improvements				9,359,000
Buildings and improvements				28,570,000
Total	$ 37,929,000			37,929,000
Accumulated depreciation	$ (5,605,000)			(5,605,000)
Date of construction	1971
Date acquired	Mar-11
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 37,929,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,605,000)
Unencumbered Apartment Communities [Member] | 1000 Kiely [Member] | Santa Clara, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | 1000 Kiely [Member] | Santa Clara, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Kings Road [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	196
Initial cost [Abstract]
Land				4,023,000
Buildings and improvements				9,527,000
Costs capitalized subsequent to acquisition				10,731,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,031,000
Buildings and improvements				20,250,000
Total	$ 24,281,000			24,281,000
Accumulated depreciation	$ (11,236,000)			(11,236,000)
Date of construction	1979
Date acquired	Jun-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 24,281,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (11,236,000)
Unencumbered Apartment Communities [Member] | Kings Road [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Kings Road [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Lafayette Highlands [Member] | Lafayette, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	150
Initial cost [Abstract]
Land				17,774,000
Buildings and improvements				41,473,000
Costs capitalized subsequent to acquisition				410,000
Gross amount carried at close of period [Abstract]
Land and improvements				17,774,000
Buildings and improvements				41,883,000
Total	$ 59,657,000			59,657,000
Accumulated depreciation	$ (2,716,000)			(2,716,000)
Date of construction	1973
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 59,657,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,716,000)
Unencumbered Apartment Communities [Member] | Lafayette Highlands [Member] | Lafayette, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Lafayette Highlands [Member] | Lafayette, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Lakeshore Landing [Member] | San Mateo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	308
Initial cost [Abstract]
Land				38,155,000
Buildings and improvements				89,028,000
Costs capitalized subsequent to acquisition				2,950,000
Gross amount carried at close of period [Abstract]
Land and improvements				38,155,000
Buildings and improvements				91,978,000
Total	$ 130,133,000			130,133,000
Accumulated depreciation	$ (6,171,000)			(6,171,000)
Date of construction	1988
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 130,133,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (6,171,000)
Unencumbered Apartment Communities [Member] | Lakeshore Landing [Member] | San Mateo, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Lakeshore Landing [Member] | San Mateo, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | The Laurels at Mill Creek [Member] | Lake Forest, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	164
Initial cost [Abstract]
Land				1,559,000
Buildings and improvements				6,430,000
Costs capitalized subsequent to acquisition				5,390,000
Gross amount carried at close of period [Abstract]
Land and improvements				1,595,000
Buildings and improvements				11,784,000
Total	$ 13,379,000			13,379,000
Accumulated depreciation	$ (7,694,000)			(7,694,000)
Date of construction	1981
Date acquired	Dec-96
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 13,379,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,694,000)
Unencumbered Apartment Communities [Member] | The Laurels at Mill Creek [Member] | Lake Forest, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | The Laurels at Mill Creek [Member] | Lake Forest, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Lawrence Station [Member] | Sunnyvale, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Lawrence Station [Member] | Sunnyvale, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Lawrence Station [Member] | Lake Forest, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	336
Initial cost [Abstract]
Land				45,532,000
Buildings and improvements				106,735,000
Costs capitalized subsequent to acquisition				(15,000)
Gross amount carried at close of period [Abstract]
Land and improvements				45,532,000
Buildings and improvements				106,720,000
Total	$ 152,252,000			152,252,000
Accumulated depreciation	(8,451,000)			(8,451,000)
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	152,252,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (8,451,000)
Unencumbered Apartment Communities [Member] | Le Parc Luxury Apartments [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	140
Initial cost [Abstract]
Land				3,090,000
Buildings and improvements				7,421,000
Costs capitalized subsequent to acquisition				11,118,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,092,000
Buildings and improvements				18,537,000
Total	$ 21,629,000			21,629,000
Accumulated depreciation	$ (12,351,000)			(12,351,000)
Date of construction	1975
Date acquired	Feb-94
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 21,629,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (12,351,000)
Unencumbered Apartment Communities [Member] | Le Parc Luxury Apartments [Member] | Santa Clara, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Le Parc Luxury Apartments [Member] | Santa Clara, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Marbrisa [Member] | Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	202
Initial cost [Abstract]
Land				4,700,000
Buildings and improvements				18,605,000
Costs capitalized subsequent to acquisition				6,526,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,760,000
Buildings and improvements				25,071,000
Total	$ 29,831,000			29,831,000
Accumulated depreciation	$ (10,771,000)			(10,771,000)
Date of construction	1987
Date acquired	Sep-02
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 29,831,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (10,771,000)
Unencumbered Apartment Communities [Member] | Marbrisa [Member] | Long Beach, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Marbrisa [Member] | Long Beach, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Marina City Club [Member] | Marina Del Rey, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	101
Initial cost [Abstract]
Land				0
Buildings and improvements				28,167,000
Costs capitalized subsequent to acquisition				40,352,000
Gross amount carried at close of period [Abstract]
Land and improvements				0
Buildings and improvements				68,519,000
Total	$ 68,519,000			68,519,000
Accumulated depreciation	$ (17,674,000)			(17,674,000)
Date of construction	1971
Date acquired	Jan-04
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 68,519,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (17,674,000)
Unencumbered Apartment Communities [Member] | Marina City Club [Member] | Marina Del Rey, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Marina City Club [Member] | Marina Del Rey, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Marina Cove [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	292
Initial cost [Abstract]
Land				5,320,000
Buildings and improvements				16,431,000
Costs capitalized subsequent to acquisition				12,560,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,324,000
Buildings and improvements				28,987,000
Total	$ 34,311,000			34,311,000
Accumulated depreciation	$ (18,435,000)			(18,435,000)
Date of construction	1974
Date acquired	Jun-94
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 34,311,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (18,435,000)
Unencumbered Apartment Communities [Member] | Marina Cove [Member] | Santa Clara, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Marina Cove [Member] | Santa Clara, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Mariners Place [Member] | Oxnard, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	105
Initial cost [Abstract]
Land				1,555,000
Buildings and improvements				6,103,000
Costs capitalized subsequent to acquisition				2,150,000
Gross amount carried at close of period [Abstract]
Land and improvements				1,562,000
Buildings and improvements				8,246,000
Total	$ 9,808,000			9,808,000
Accumulated depreciation	$ (4,584,000)			(4,584,000)
Date of construction	1987
Date acquired	May-00
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 9,808,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,584,000)
Unencumbered Apartment Communities [Member] | Mariners Place [Member] | Oxnard, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Mariners Place [Member] | Oxnard, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | MB 360 Phase 1 [Member] | San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	188
Initial cost [Abstract]
Land				21,421,000
Buildings and improvements				114,376,000
Costs capitalized subsequent to acquisition				0
Gross amount carried at close of period [Abstract]
Land and improvements				21,421,000
Buildings and improvements				114,376,000
Total	$ 135,797,000			135,797,000
Accumulated depreciation	$ (3,749,000)			(3,749,000)
Date of construction	2014
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 135,797,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,749,000)
Unencumbered Apartment Communities [Member] | MB 360 Phase 1 [Member] | San Francisco, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | MB 360 Phase 1 [Member] | San Francisco, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Meadowood [Member] | Simi Valley, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	320
Initial cost [Abstract]
Land				7,852,000
Buildings and improvements				18,592,000
Costs capitalized subsequent to acquisition				7,060,000
Gross amount carried at close of period [Abstract]
Land and improvements				7,898,000
Buildings and improvements				25,606,000
Total	$ 33,504,000			33,504,000
Accumulated depreciation	$ (16,003,000)			(16,003,000)
Date of construction	1986
Date acquired	Nov-96
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 33,504,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (16,003,000)
Unencumbered Apartment Communities [Member] | Meadowood [Member] | Simi Valley, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Meadowood [Member] | Simi Valley, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Mesa Village [Member] | Clairemont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	133
Initial cost [Abstract]
Land				1,888,000
Buildings and improvements				7,498,000
Costs capitalized subsequent to acquisition				1,250,000
Gross amount carried at close of period [Abstract]
Land and improvements				1,894,000
Buildings and improvements				8,742,000
Total	$ 10,636,000			10,636,000
Accumulated depreciation	$ (3,967,000)			(3,967,000)
Date of construction	1963
Date acquired	Dec-02
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 10,636,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,967,000)
Unencumbered Apartment Communities [Member] | Mesa Village [Member] | Clairemont, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Mesa Village [Member] | Clairemont, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Mira Monte [Member] | Ventura, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	355
Initial cost [Abstract]
Land				7,165,000
Buildings and improvements				28,459,000
Costs capitalized subsequent to acquisition				9,237,000
Gross amount carried at close of period [Abstract]
Land and improvements				7,186,000
Buildings and improvements				37,675,000
Total	$ 44,861,000			44,861,000
Accumulated depreciation	$ (19,094,000)			(19,094,000)
Date of construction	1982
Date acquired	Dec-02
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 44,861,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (19,094,000)
Unencumbered Apartment Communities [Member] | Mira Monte [Member] | Ventura, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Mira Monte [Member] | Ventura, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Miracle Mile Marbella [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	236
Initial cost [Abstract]
Land				7,791,000
Buildings and improvements				23,075,000
Costs capitalized subsequent to acquisition				13,484,000
Gross amount carried at close of period [Abstract]
Land and improvements				7,886,000
Buildings and improvements				36,464,000
Total	$ 44,350,000			44,350,000
Accumulated depreciation	$ (20,985,000)			(20,985,000)
Date of construction	1988
Date acquired	Aug-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 44,350,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (20,985,000)
Unencumbered Apartment Communities [Member] | Miracle Mile Marbella [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Miracle Mile Marbella [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Mission Hills [Member] | Oceanside, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	282
Initial cost [Abstract]
Land				10,099,000
Buildings and improvements				38,778,000
Costs capitalized subsequent to acquisition				4,996,000
Gross amount carried at close of period [Abstract]
Land and improvements				10,167,000
Buildings and improvements				43,706,000
Total	$ 53,873,000			53,873,000
Accumulated depreciation	$ (16,771,000)			(16,771,000)
Date of construction	1984
Date acquired	Jul-05
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 53,873,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (16,771,000)
Unencumbered Apartment Communities [Member] | Mission Hills [Member] | Oceanside, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Mission Hills [Member] | Oceanside, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Mission Peaks [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	453
Initial cost [Abstract]
Land				46,499,000
Buildings and improvements				108,498,000
Costs capitalized subsequent to acquisition				1,181,000
Gross amount carried at close of period [Abstract]
Land and improvements				46,499,000
Buildings and improvements				109,679,000
Total	$ 156,178,000			156,178,000
Accumulated depreciation	$ (7,087,000)			(7,087,000)
Date of construction	1995
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 156,178,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,087,000)
Unencumbered Apartment Communities [Member] | Mission Peaks [Member] | Fremont, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Mission Peaks [Member] | Fremont, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Mission Peaks II [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	336
Initial cost [Abstract]
Land				31,429,000
Buildings and improvements				73,334,000
Costs capitalized subsequent to acquisition				2,011,000
Gross amount carried at close of period [Abstract]
Land and improvements				31,429,000
Buildings and improvements				75,345,000
Total	$ 106,774,000			106,774,000
Accumulated depreciation	$ (4,860,000)			(4,860,000)
Date of construction	1989
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 106,774,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,860,000)
Unencumbered Apartment Communities [Member] | Mission Peaks II [Member] | Fremont, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Mission Peaks II [Member] | Fremont, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Monterey Villas [Member] | Oxnard, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	122
Initial cost [Abstract]
Land				2,349,000
Buildings and improvements				5,579,000
Costs capitalized subsequent to acquisition				5,880,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,424,000
Buildings and improvements				11,384,000
Total	$ 13,808,000			13,808,000
Accumulated depreciation	$ (6,284,000)			(6,284,000)
Date of construction	1974
Date acquired	Jul-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 13,808,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (6,284,000)
Unencumbered Apartment Communities [Member] | Monterey Villas [Member] | Oxnard, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Monterey Villas [Member] | Oxnard, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Muse [Member] | Hollywood, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	152
Initial cost [Abstract]
Land				7,822,000
Buildings and improvements				33,436,000
Costs capitalized subsequent to acquisition				2,168,000
Gross amount carried at close of period [Abstract]
Land and improvements				7,823,000
Buildings and improvements				35,603,000
Total	$ 43,426,000			43,426,000
Accumulated depreciation	$ (8,563,000)			(8,563,000)
Date of construction	2011
Date acquired	Feb-11
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 43,426,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (8,563,000)
Unencumbered Apartment Communities [Member] | Muse [Member] | Hollywood, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Muse [Member] | Hollywood, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Museum Park [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	117
Initial cost [Abstract]
Land				13,864,000
Buildings and improvements				32,348,000
Costs capitalized subsequent to acquisition				476,000
Gross amount carried at close of period [Abstract]
Land and improvements				13,864,000
Buildings and improvements				32,824,000
Total	$ 46,688,000			46,688,000
Accumulated depreciation	$ (2,145,000)			(2,145,000)
Date of construction	2002
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 46,688,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,145,000)
Unencumbered Apartment Communities [Member] | Museum Park [Member] | San Jose, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Museum Park [Member] | San Jose, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Paragon Apartments [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	301
Initial cost [Abstract]
Land				32,230,000
Buildings and improvements				77,320,000
Costs capitalized subsequent to acquisition				328,000
Gross amount carried at close of period [Abstract]
Land and improvements				32,230,000
Buildings and improvements				77,648,000
Total	$ 109,878,000			109,878,000
Accumulated depreciation	$ (3,782,000)			(3,782,000)
Date of construction	2013
Date acquired	Jul-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 109,878,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,782,000)
Unencumbered Apartment Communities [Member] | Paragon Apartments [Member] | Fremont, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Paragon Apartments [Member] | Fremont, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Park Catalina [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	90
Initial cost [Abstract]
Land				4,710,000
Buildings and improvements				18,839,000
Costs capitalized subsequent to acquisition				2,281,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,710,000
Buildings and improvements				21,120,000
Total	$ 25,830,000			25,830,000
Accumulated depreciation	$ (2,730,000)			(2,730,000)
Date of construction	2002
Date acquired	Jun-12
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 25,830,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,730,000)
Unencumbered Apartment Communities [Member] | Park Catalina [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Park Catalina [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Park West [Member] | San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	126
Initial cost [Abstract]
Land				9,424,000
Buildings and improvements				21,988,000
Costs capitalized subsequent to acquisition				9,472,000
Gross amount carried at close of period [Abstract]
Land and improvements				9,424,000
Buildings and improvements				31,460,000
Total	$ 40,884,000			40,884,000
Accumulated depreciation	$ (3,667,000)			(3,667,000)
Date of construction	1958
Date acquired	Sep-12
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 40,884,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,667,000)
Unencumbered Apartment Communities [Member] | Park West [Member] | San Francisco, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Park West [Member] | San Francisco, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Parkwood at Mill Creek [Member] | Lake Forest, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	240
Initial cost [Abstract]
Land				10,680,000
Buildings and improvements				42,722,000
Costs capitalized subsequent to acquisition				1,517,000
Gross amount carried at close of period [Abstract]
Land and improvements				10,680,000
Buildings and improvements				44,239,000
Total	$ 54,919,000			54,919,000
Accumulated depreciation	$ (2,875,000)			(2,875,000)
Date of construction	1989
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 54,919,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,875,000)
Unencumbered Apartment Communities [Member] | Parkwood at Mill Creek [Member] | Lake Forest, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Parkwood at Mill Creek [Member] | Lake Forest, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Pinehurst [Member] | Ventura, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	28
Initial cost [Abstract]
Land				0
Buildings and improvements				1,711,000
Costs capitalized subsequent to acquisition				482,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,000
Buildings and improvements				2,187,000
Total	$ 2,193,000			2,193,000
Accumulated depreciation	$ (1,049,000)			(1,049,000)
Date of construction	1973
Date acquired	Dec-04
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 2,193,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (1,049,000)
Unencumbered Apartment Communities [Member] | Pinehurst [Member] | Ventura, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Pinehurst [Member] | Ventura, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Pinnacle Crow Canyon [Member] | San Ramon, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	400
Initial cost [Abstract]
Land				37,579,000
Buildings and improvements				87,685,000
Costs capitalized subsequent to acquisition				1,717,000
Gross amount carried at close of period [Abstract]
Land and improvements				37,579,000
Buildings and improvements				89,402,000
Total	$ 126,981,000			126,981,000
Accumulated depreciation	$ (5,791,000)			(5,791,000)
Date of construction	1992
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 126,981,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,791,000)
Unencumbered Apartment Communities [Member] | Pinnacle Crow Canyon [Member] | San Ramon, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Pinnacle Crow Canyon [Member] | San Ramon, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Pinnacle Sonata [Member] | Bothell, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	268
Initial cost [Abstract]
Land				14,647,000
Buildings and improvements				58,586,000
Costs capitalized subsequent to acquisition				564,000
Gross amount carried at close of period [Abstract]
Land and improvements				14,647,000
Buildings and improvements				59,150,000
Total	$ 73,797,000			73,797,000
Accumulated depreciation	$ (3,807,000)			(3,807,000)
Date of construction	2000
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 73,797,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,807,000)
Unencumbered Apartment Communities [Member] | Pinnacle Sonata [Member] | Bothell, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Pinnacle Sonata [Member] | Bothell, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Radius [Member] | Redwood City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	264
Initial cost [Abstract]
Land				11,702,000
Buildings and improvements				152,336,000
Costs capitalized subsequent to acquisition				28,000
Gross amount carried at close of period [Abstract]
Land and improvements				11,702,000
Buildings and improvements				152,364,000
Total	$ 164,066,000			164,066,000
Accumulated depreciation	$ (7,622,000)			(7,622,000)
Date of construction	2015
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 164,066,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,622,000)
Unencumbered Apartment Communities [Member] | Radius [Member] | Redwood City, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Radius [Member] | Redwood City, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Reed Square [Member] | Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	100
Initial cost [Abstract]
Land				6,873,000
Buildings and improvements				16,037,000
Costs capitalized subsequent to acquisition				7,750,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,873,000
Buildings and improvements				23,787,000
Total	$ 30,660,000			30,660,000
Accumulated depreciation	$ (4,356,000)			(4,356,000)
Date of construction	1970
Date acquired	Jan-12
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 30,660,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,356,000)
Unencumbered Apartment Communities [Member] | Reed Square [Member] | Sunnyvale, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Reed Square [Member] | Sunnyvale, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Regency at Encino [Member] | Encino, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	75
Initial cost [Abstract]
Land				3,184,000
Buildings and improvements				12,737,000
Costs capitalized subsequent to acquisition				2,519,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,184,000
Buildings and improvements				15,256,000
Total	$ 18,440,000			18,440,000
Accumulated depreciation	$ (3,896,000)			(3,896,000)
Date of construction	1989
Date acquired	Dec-09
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 18,440,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,896,000)
Unencumbered Apartment Communities [Member] | Regency at Encino [Member] | Encino, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Regency at Encino [Member] | Encino, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Renaissance at Uptown Orange [Member] | Orange, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	460
Initial cost [Abstract]
Land				27,870,000
Buildings and improvements				111,482,000
Costs capitalized subsequent to acquisition				1,600,000
Gross amount carried at close of period [Abstract]
Land and improvements				27,870,000
Buildings and improvements				113,082,000
Total	$ 140,952,000			140,952,000
Accumulated depreciation	$ (7,246,000)			(7,246,000)
Date of construction	2007
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 140,952,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,246,000)
Unencumbered Apartment Communities [Member] | Renaissance at Uptown Orange [Member] | Orange, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Renaissance at Uptown Orange [Member] | Orange, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | The Reveal [Member] | Woodland Hills, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	438
Initial cost [Abstract]
Land				25,073,000
Buildings and improvements				121,314,000
Costs capitalized subsequent to acquisition				232,000
Gross amount carried at close of period [Abstract]
Land and improvements				25,073,000
Buildings and improvements				121,546,000
Total	$ 146,619,000			146,619,000
Accumulated depreciation	$ (3,334,000)			(3,334,000)
Date of construction	2010
Date acquired	Apr-15
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 146,619,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,334,000)
Unencumbered Apartment Communities [Member] | The Reveal [Member] | Woodland Hills, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | The Reveal [Member] | Woodland Hills, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Salmon Run at Perry Creek [Member] | Bothell, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	132
Initial cost [Abstract]
Land				3,717,000
Buildings and improvements				11,483,000
Costs capitalized subsequent to acquisition				1,624,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,801,000
Buildings and improvements				13,023,000
Total	$ 16,824,000			16,824,000
Accumulated depreciation	$ (6,577,000)			(6,577,000)
Date of construction	2000
Date acquired	Oct-00
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 16,824,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (6,577,000)
Unencumbered Apartment Communities [Member] | Salmon Run at Perry Creek [Member] | Bothell, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Salmon Run at Perry Creek [Member] | Bothell, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Sammamish View [Member] | Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	323
Initial cost [Abstract]
Land				4,173,000
Buildings and improvements				58,961,000
Costs capitalized subsequent to acquisition				8,048,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,173,000
Buildings and improvements				67,009,000
Total	$ 71,182,000			71,182,000
Accumulated depreciation	$ (13,787,000)			(13,787,000)
Date of construction	2001
Date acquired	Jul-10
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 71,182,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (13,787,000)
Unencumbered Apartment Communities [Member] | Sammamish View [Member] | Bellevue, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Sammamish View [Member] | Bellevue, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | 101 San Fernando [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	153
Initial cost [Abstract]
Land				3,324,000
Buildings and improvements				7,501,000
Costs capitalized subsequent to acquisition				6,192,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,331,000
Buildings and improvements				13,686,000
Total	$ 17,017,000			17,017,000
Accumulated depreciation	$ (10,310,000)			(10,310,000)
Date of construction	1986
Date acquired	Nov-94
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 17,017,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (10,310,000)
Unencumbered Apartment Communities [Member] | 101 San Fernando [Member] | San Jose, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | 101 San Fernando [Member] | San Jose, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | San Marcos [Member] | Richmond, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	432
Initial cost [Abstract]
Land				15,563,000
Buildings and improvements				36,204,000
Costs capitalized subsequent to acquisition				27,780,000
Gross amount carried at close of period [Abstract]
Land and improvements				22,866,000
Buildings and improvements				56,681,000
Total	$ 79,547,000			79,547,000
Accumulated depreciation	$ (23,786,000)			(23,786,000)
Date of construction	2003
Date acquired	Nov-03
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 79,547,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (23,786,000)
Unencumbered Apartment Communities [Member] | San Marcos [Member] | Richmond, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | San Marcos [Member] | Richmond, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Santee Court [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	238
Initial cost [Abstract]
Land				9,581,000
Buildings and improvements				40,317,000
Costs capitalized subsequent to acquisition				4,524,000
Gross amount carried at close of period [Abstract]
Land and improvements				9,582,000
Buildings and improvements				44,840,000
Total	$ 54,422,000			54,422,000
Accumulated depreciation	$ (8,616,000)			(8,616,000)
Date of construction	2004
Date acquired	Oct-10
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 54,422,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (8,616,000)
Unencumbered Apartment Communities [Member] | Santee Court [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Santee Court [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Shadow Point [Member] | Spring Valley, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	172
Initial cost [Abstract]
Land				2,812,000
Buildings and improvements				11,170,000
Costs capitalized subsequent to acquisition				2,406,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,820,000
Buildings and improvements				13,568,000
Total	$ 16,388,000			16,388,000
Accumulated depreciation	$ (6,197,000)			(6,197,000)
Date of construction	1983
Date acquired	Dec-02
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 16,388,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (6,197,000)
Unencumbered Apartment Communities [Member] | Shadow Point [Member] | Spring Valley, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Shadow Point [Member] | Spring Valley, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Shadowbrook [Member] | Redmond, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	418
Initial cost [Abstract]
Land				19,292,000
Buildings and improvements				77,168,000
Costs capitalized subsequent to acquisition				2,326,000
Gross amount carried at close of period [Abstract]
Land and improvements				19,292,000
Buildings and improvements				79,494,000
Total	$ 98,786,000			98,786,000
Accumulated depreciation	$ (5,082,000)			(5,082,000)
Date of construction	1986
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 98,786,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,082,000)
Unencumbered Apartment Communities [Member] | Shadowbrook [Member] | Redmond, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Shadowbrook [Member] | Redmond, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Slater 116 [Member] | Kirkland, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	108
Initial cost [Abstract]
Land				7,379,000
Buildings and improvements				22,138,000
Costs capitalized subsequent to acquisition				513,000
Gross amount carried at close of period [Abstract]
Land and improvements				7,379,000
Buildings and improvements				22,651,000
Total	$ 30,030,000			30,030,000
Accumulated depreciation	$ (1,793,000)			(1,793,000)
Date of construction	2013
Date acquired	Sep-13
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 30,030,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (1,793,000)
Unencumbered Apartment Communities [Member] | Slater 116 [Member] | Kirkland, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Slater 116 [Member] | Kirkland, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Solstice [Member] | Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	280
Initial cost [Abstract]
Land				34,444,000
Buildings and improvements				147,262,000
Costs capitalized subsequent to acquisition				4,096,000
Gross amount carried at close of period [Abstract]
Land and improvements				34,444,000
Buildings and improvements				151,358,000
Total	$ 185,802,000			185,802,000
Accumulated depreciation	$ (11,281,000)			(11,281,000)
Date of construction	2014
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 185,802,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (11,281,000)
Unencumbered Apartment Communities [Member] | Solstice [Member] | Sunnyvale, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Solstice [Member] | Sunnyvale, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Summit Park [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	300
Initial cost [Abstract]
Land				5,959,000
Buildings and improvements				23,670,000
Costs capitalized subsequent to acquisition				4,773,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,977,000
Buildings and improvements				28,425,000
Total	$ 34,402,000			34,402,000
Accumulated depreciation	$ (13,134,000)			(13,134,000)
Date of construction	1972
Date acquired	Dec-02
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 34,402,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (13,134,000)
Unencumbered Apartment Communities [Member] | Summit Park [Member] | San Diego, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Summit Park [Member] | San Diego, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Taylor 28 [Member] | Seattle, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	197
Initial cost [Abstract]
Land				13,915,000
Buildings and improvements				57,700,000
Costs capitalized subsequent to acquisition				218,000
Gross amount carried at close of period [Abstract]
Land and improvements				13,915,000
Buildings and improvements				57,918,000
Total	$ 71,833,000			71,833,000
Accumulated depreciation	$ (3,686,000)			(3,686,000)
Date of construction	2008
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 71,833,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,686,000)
Unencumbered Apartment Communities [Member] | Taylor 28 [Member] | Seattle, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Taylor 28 [Member] | Seattle, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Cairns, The [Member] | Seattle, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	100
Initial cost [Abstract]
Land				6,937,000
Buildings and improvements				20,679,000
Costs capitalized subsequent to acquisition				1,055,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,939,000
Buildings and improvements				21,732,000
Total	$ 28,671,000			28,671,000
Accumulated depreciation	$ (6,340,000)			(6,340,000)
Date of construction	2006
Date acquired	Jun-07
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 28,671,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (6,340,000)
Unencumbered Apartment Communities [Member] | Cairns, The [Member] | Seattle, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Cairns, The [Member] | Seattle, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | The Commons [Member] | Campbell, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	264
Initial cost [Abstract]
Land				12,555,000
Buildings and improvements				29,307,000
Costs capitalized subsequent to acquisition				4,687,000
Gross amount carried at close of period [Abstract]
Land and improvements				12,556,000
Buildings and improvements				33,993,000
Total	$ 46,549,000			46,549,000
Accumulated depreciation	$ (7,457,000)			(7,457,000)
Date of construction	1973
Date acquired	Jul-10
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 46,549,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,457,000)
Unencumbered Apartment Communities [Member] | The Commons [Member] | Campbell, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | The Commons [Member] | Campbell, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | The Grand [Member] | Oakland, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	243
Initial cost [Abstract]
Land				4,531,000
Buildings and improvements				89,208,000
Costs capitalized subsequent to acquisition				5,072,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,531,000
Buildings and improvements				94,280,000
Total	$ 98,811,000			98,811,000
Accumulated depreciation	$ (24,391,000)			(24,391,000)
Date of construction	2009
Date acquired	Jan-09
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 98,811,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (24,391,000)
Unencumbered Apartment Communities [Member] | The Grand [Member] | Oakland, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | The Grand [Member] | Oakland, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | The Hallie on Del Mar/Rey/Sol [Member] | Pasadena, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	292
Initial cost [Abstract]
Land				2,202,000
Buildings and improvements				4,794,000
Costs capitalized subsequent to acquisition				48,986,000
Gross amount carried at close of period [Abstract]
Land and improvements				8,385,000
Buildings and improvements				47,597,000
Total	$ 55,982,000			55,982,000
Accumulated depreciation	$ (17,675,000)			(17,675,000)
Date of construction	1972
Date acquired	Apr-99
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 55,982,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (17,675,000)
Unencumbered Apartment Communities [Member] | The Hallie on Del Mar/Rey/Sol [Member] | Pasadena, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | The Hallie on Del Mar/Rey/Sol [Member] | Pasadena, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Lofts at Pinehurst, The [Member] | Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	118
Initial cost [Abstract]
Land				1,570,000
Buildings and improvements				3,912,000
Costs capitalized subsequent to acquisition				4,544,000
Gross amount carried at close of period [Abstract]
Land and improvements				1,618,000
Buildings and improvements				8,408,000
Total	$ 10,026,000			10,026,000
Accumulated depreciation	$ (4,565,000)			(4,565,000)
Date of construction	2012
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 10,026,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,565,000)
Unencumbered Apartment Communities [Member] | Lofts at Pinehurst, The [Member] | Sunnyvale, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Lofts at Pinehurst, The [Member] | Sunnyvale, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Pointe at Cupertino, The [Member] | Cupertino, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	116
Initial cost [Abstract]
Land				4,505,000
Buildings and improvements				17,605,000
Costs capitalized subsequent to acquisition				11,510,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,505,000
Buildings and improvements				29,115,000
Total	$ 33,620,000			33,620,000
Accumulated depreciation	$ (11,984,000)			(11,984,000)
Date of construction	1963
Date acquired	Aug-98
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 33,620,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (11,984,000)
Unencumbered Apartment Communities [Member] | Pointe at Cupertino, The [Member] | Cupertino, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Pointe at Cupertino, The [Member] | Cupertino, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | The Stuart at Sierra Madre [Member] | Pasadena, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	188
Initial cost [Abstract]
Land				13,574,000
Buildings and improvements				54,298,000
Costs capitalized subsequent to acquisition				1,486,000
Gross amount carried at close of period [Abstract]
Land and improvements				13,574,000
Buildings and improvements				55,784,000
Total	$ 69,358,000			69,358,000
Accumulated depreciation	$ (3,674,000)			(3,674,000)
Date of construction	2007
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 69,358,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,674,000)
Unencumbered Apartment Communities [Member] | The Stuart at Sierra Madre [Member] | Pasadena, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | The Stuart at Sierra Madre [Member] | Pasadena, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | The Trails of Redmond [Member] | Redmond, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	423
Initial cost [Abstract]
Land				21,930,000
Buildings and improvements				87,720,000
Costs capitalized subsequent to acquisition				2,408,000
Gross amount carried at close of period [Abstract]
Land and improvements				21,930,000
Buildings and improvements				90,128,000
Total	$ 112,058,000			112,058,000
Accumulated depreciation	$ (5,779,000)			(5,779,000)
Date of construction	1985
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 112,058,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,779,000)
Unencumbered Apartment Communities [Member] | The Trails of Redmond [Member] | Redmond, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | The Trails of Redmond [Member] | Redmond, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Tiffany Court [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	101
Initial cost [Abstract]
Land				6,949,000
Buildings and improvements				27,796,000
Costs capitalized subsequent to acquisition				461,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,949,000
Buildings and improvements				28,257,000
Total	$ 35,206,000			35,206,000
Accumulated depreciation	$ (1,811,000)			(1,811,000)
Date of construction	1987
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 35,206,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (1,811,000)
Unencumbered Apartment Communities [Member] | Tiffany Court [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Tiffany Court [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Trabucco Villas [Member] | Lake Forest, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	132
Initial cost [Abstract]
Land				3,638,000
Buildings and improvements				8,640,000
Costs capitalized subsequent to acquisition				2,605,000
Gross amount carried at close of period [Abstract]
Land and improvements				3,890,000
Buildings and improvements				10,993,000
Total	$ 14,883,000			14,883,000
Accumulated depreciation	$ (6,549,000)			(6,549,000)
Date of construction	1985
Date acquired	Oct-97
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 14,883,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (6,549,000)
Unencumbered Apartment Communities [Member] | Trabucco Villas [Member] | Lake Forest, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Trabucco Villas [Member] | Lake Forest, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Tuscana [Member] | Tracy, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	30
Initial cost [Abstract]
Land				2,828,000
Buildings and improvements				6,599,000
Costs capitalized subsequent to acquisition				166,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,870,000
Buildings and improvements				6,723,000
Total	$ 9,593,000			9,593,000
Accumulated depreciation	$ (2,668,000)			(2,668,000)
Date of construction	2007
Date acquired	Feb-07
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 9,593,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,668,000)
Unencumbered Apartment Communities [Member] | Tuscana [Member] | Tracy, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Tuscana [Member] | Tracy, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Via [Member] | Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	284
Initial cost [Abstract]
Land				22,000,000
Buildings and improvements				82,270,000
Costs capitalized subsequent to acquisition				944,000
Gross amount carried at close of period [Abstract]
Land and improvements				22,016,000
Buildings and improvements				83,198,000
Total	$ 105,214,000			105,214,000
Accumulated depreciation	$ (15,571,000)			(15,571,000)
Date of construction	2011
Date acquired	Jul-11
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 105,214,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (15,571,000)
Unencumbered Apartment Communities [Member] | Via [Member] | Sunnyvale, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Via [Member] | Sunnyvale, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Villa Siena [Member] | Costa Mesa, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	272
Initial cost [Abstract]
Land				13,842,000
Buildings and improvements				55,367,000
Costs capitalized subsequent to acquisition				1,333,000
Gross amount carried at close of period [Abstract]
Land and improvements				13,842,000
Buildings and improvements				56,700,000
Total	$ 70,542,000			70,542,000
Accumulated depreciation	$ (3,632,000)			(3,632,000)
Date of construction	1974
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 70,542,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (3,632,000)
Unencumbered Apartment Communities [Member] | Villa Siena [Member] | Costa Mesa, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Villa Siena [Member] | Costa Mesa, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Village Green [Member] | La Habra, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	272
Initial cost [Abstract]
Land				6,488,000
Buildings and improvements				36,768,000
Costs capitalized subsequent to acquisition				2,168,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,488,000
Buildings and improvements				38,936,000
Total	$ 45,424,000			45,424,000
Accumulated depreciation	$ (2,491,000)			(2,491,000)
Date of construction	1971
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 45,424,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (2,491,000)
Unencumbered Apartment Communities [Member] | Village Green [Member] | La Habra, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Village Green [Member] | La Habra, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Vista Belvedere [Member] | Tiburon, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	76
Initial cost [Abstract]
Land				5,573,000
Buildings and improvements				11,901,000
Costs capitalized subsequent to acquisition				7,360,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,573,000
Buildings and improvements				19,261,000
Total	$ 24,834,000			24,834,000
Accumulated depreciation	$ (7,708,000)			(7,708,000)
Date of construction	1963
Date acquired	Aug-04
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 24,834,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (7,708,000)
Unencumbered Apartment Communities [Member] | Vista Belvedere [Member] | Tiburon, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Vista Belvedere [Member] | Tiburon, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Vox Apartments [Member] | Seattle, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	58
Initial cost [Abstract]
Land				5,545,000
Buildings and improvements				16,635,000
Costs capitalized subsequent to acquisition				70,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,545,000
Buildings and improvements				16,705,000
Total	$ 22,250,000			22,250,000
Accumulated depreciation	$ (1,237,000)			(1,237,000)
Date of construction	2013
Date acquired	Oct-13
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 22,250,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (1,237,000)
Unencumbered Apartment Communities [Member] | Vox Apartments [Member] | Seattle, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Vox Apartments [Member] | Seattle, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Walnut Heights [Member] | Walnut, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	163
Initial cost [Abstract]
Land				4,858,000
Buildings and improvements				19,168,000
Costs capitalized subsequent to acquisition				3,920,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,887,000
Buildings and improvements				23,059,000
Total	$ 27,946,000			27,946,000
Accumulated depreciation	$ (9,514,000)			(9,514,000)
Date of construction	1964
Date acquired	Oct-03
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 27,946,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (9,514,000)
Unencumbered Apartment Communities [Member] | Walnut Heights [Member] | Walnut, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Walnut Heights [Member] | Walnut, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Wharfside Pointe [Member] | Seattle, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	155
Initial cost [Abstract]
Land				2,245,000
Buildings and improvements				7,020,000
Costs capitalized subsequent to acquisition				10,292,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,258,000
Buildings and improvements				17,299,000
Total	$ 19,557,000			19,557,000
Accumulated depreciation	$ (10,007,000)			(10,007,000)
Date of construction	1990
Date acquired	Jun-94
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 19,557,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (10,007,000)
Unencumbered Apartment Communities [Member] | Wharfside Pointe [Member] | Seattle, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Wharfside Pointe [Member] | Seattle, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Willow Lake [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	508
Initial cost [Abstract]
Land				43,194,000
Buildings and improvements				101,030,000
Costs capitalized subsequent to acquisition				6,615,000
Gross amount carried at close of period [Abstract]
Land and improvements				43,194,000
Buildings and improvements				107,645,000
Total	$ 150,839,000			150,839,000
Accumulated depreciation	$ (12,559,000)			(12,559,000)
Date of construction	1989
Date acquired	Oct-12
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 150,839,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (12,559,000)
Unencumbered Apartment Communities [Member] | Willow Lake [Member] | San Jose, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Willow Lake [Member] | San Jose, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | 5600 Wilshire [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	284
Initial cost [Abstract]
Land				30,535,000
Buildings and improvements				91,604,000
Costs capitalized subsequent to acquisition				471,000
Gross amount carried at close of period [Abstract]
Land and improvements				30,535,000
Buildings and improvements				92,075,000
Total	$ 122,610,000			122,610,000
Accumulated depreciation	$ (5,937,000)			(5,937,000)
Date of construction	2008
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 122,610,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,937,000)
Unencumbered Apartment Communities [Member] | 5600 Wilshire [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | 5600 Wilshire [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Wilshire La Brea [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	478
Initial cost [Abstract]
Land				56,932,000
Buildings and improvements				211,998,000
Costs capitalized subsequent to acquisition				6,259,000
Gross amount carried at close of period [Abstract]
Land and improvements				56,932,000
Buildings and improvements				218,257,000
Total	$ 275,189,000			275,189,000
Accumulated depreciation	$ (16,228,000)			(16,228,000)
Date of construction	2014
Date acquired	Apr-14
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 275,189,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (16,228,000)
Unencumbered Apartment Communities [Member] | Wilshire La Brea [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	5 years
Unencumbered Apartment Communities [Member] | Wilshire La Brea [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Windsor Ridge [Member] | Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	216
Initial cost [Abstract]
Land				4,017,000
Buildings and improvements				10,315,000
Costs capitalized subsequent to acquisition				15,210,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,021,000
Buildings and improvements				25,521,000
Total	$ 29,542,000			29,542,000
Accumulated depreciation	$ (15,505,000)			(15,505,000)
Date of construction	1989
Date acquired	Mar-89
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 29,542,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (15,505,000)
Unencumbered Apartment Communities [Member] | Windsor Ridge [Member] | Sunnyvale, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Windsor Ridge [Member] | Sunnyvale, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Woodland Commons [Member] | Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	302
Initial cost [Abstract]
Land				2,040,000
Buildings and improvements				8,727,000
Costs capitalized subsequent to acquisition				20,544,000
Gross amount carried at close of period [Abstract]
Land and improvements				2,044,000
Buildings and improvements				29,267,000
Total	$ 31,311,000			31,311,000
Accumulated depreciation	$ (14,679,000)			(14,679,000)
Date of construction	1978
Date acquired	Mar-90
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 31,311,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (14,679,000)
Unencumbered Apartment Communities [Member] | Woodland Commons [Member] | Bellevue, WA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Woodland Commons [Member] | Bellevue, WA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Unencumbered Apartment Communities [Member] | Woodside Village [Member] | Ventura, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units | apartment	145
Initial cost [Abstract]
Land				5,331,000
Buildings and improvements				21,036,000
Costs capitalized subsequent to acquisition				3,502,000
Gross amount carried at close of period [Abstract]
Land and improvements				5,341,000
Buildings and improvements				24,528,000
Total	$ 29,869,000			29,869,000
Accumulated depreciation	$ (9,667,000)			$ (9,667,000)
Date of construction	1987
Date acquired	Dec-04
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 29,869,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (9,667,000)
Unencumbered Apartment Communities [Member] | Woodside Village [Member] | Ventura, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Unencumbered Apartment Communities [Member] | Woodside Village [Member] | Ventura, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Other Property [Member]
Real Estate and Accumulated Depreciation [Line Items]
Area of real estate property | ft²				279,479
Initial cost [Abstract]
Land				$ 19,751,000
Buildings and improvements				37,819,000
Costs capitalized subsequent to acquisition				12,075,000
Gross amount carried at close of period [Abstract]
Land and improvements				20,980,000
Buildings and improvements				48,665,000
Total	$ 69,645,000			69,645,000
Accumulated depreciation	(21,582,000)			$ (21,582,000)
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	69,645,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	(21,582,000)
Other Property [Member] | Essex Hollywood [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Area of real estate property | ft²				34,000
Initial cost [Abstract]
Land				$ 10,200,000
Buildings and improvements				13,800,000
Costs capitalized subsequent to acquisition				2,470,000
Gross amount carried at close of period [Abstract]
Land and improvements				10,200,000
Buildings and improvements				16,270,000
Total	26,470,000			26,470,000
Accumulated depreciation	$ (5,777,000)			$ (5,777,000)
Date of construction	1938
Date acquired	Jul-06
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 26,470,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (5,777,000)
Other Property [Member] | Essex Hollywood [Member] | Los Angeles, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Other Property [Member] | Essex Hollywood [Member] | Los Angeles, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Other Property [Member] | Santa Clara Square retail [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Area of real estate property | ft²				138,915
Initial cost [Abstract]
Land				$ 6,472,000
Buildings and improvements				11,704,000
Costs capitalized subsequent to acquisition				5,556,000
Gross amount carried at close of period [Abstract]
Land and improvements				6,472,000
Buildings and improvements				17,260,000
Total	$ 23,732,000			23,732,000
Accumulated depreciation	$ (4,643,000)			$ (4,643,000)
Date of construction	1970
Date acquired	Sep-11
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 23,732,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (4,643,000)
Other Property [Member] | Santa Clara Square retail [Member] | Santa Clara, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Other Property [Member] | Santa Clara Square retail [Member] | Santa Clara, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Other Property [Member] | 17461 Derian [Member] | Irvine, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Area of real estate property | ft²				106,564
Initial cost [Abstract]
Land				$ 3,079,000
Buildings and improvements				12,315,000
Costs capitalized subsequent to acquisition				4,049,000
Gross amount carried at close of period [Abstract]
Land and improvements				4,308,000
Buildings and improvements				15,135,000
Total	$ 19,443,000			19,443,000
Accumulated depreciation	$ (11,162,000)			(11,162,000)
Date of construction	1983
Date acquired	Jul-00
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the end of year	$ 19,443,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the end of year	$ (11,162,000)
Other Property [Member] | 17461 Derian [Member] | Irvine, CA [Member] | Minimum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	3 years
Other Property [Member] | 17461 Derian [Member] | Irvine, CA [Member] | Maximum [Member]
Gross amount carried at close of period [Abstract]
Life Used for Depreciation	30 years
Real Estate, Rental Property [Member]
Gross amount carried at close of period [Abstract]
Total	$ 11,244,681,000	5,443,757,000	5,033,672,000	$ 12,331,469,000	$ 11,244,681,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at beginning of year	11,244,681,000	5,443,757,000	5,033,672,000
Balance at the end of year	$ 12,331,469,000	$ 11,244,681,000	$ 5,443,757,000