Schedule III Real Estate and Accumulated Depreciation (Details) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
Initial cost [Abstract]
Land	$ 1,001,525
Buildings and improvements	3,304,983
Costs capitalized subsequent to acquisition	794,015
Gross amount carried at close of period [Abstract]
Land and improvements	1,070,022
Buildings and improvements	4,030,501
Total	5,100,523	[1]
Accumulated depreciation	(1,081,517)
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at beginning of year	4,313,064		3,964,561	3,310,152
Improvements	97,947		219,692	51,101
Acquisition of real estate	619,743		103,300	387,300
Development of real estate	25,545		44,280	216,008
Disposition of real estate	(22,627)		(18,769)	0
Balance at the end of year	5,033,672		4,313,064	3,964,561
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at beginning of year	920,026		775,553	646,686
Depreciation expense - Acquisitions	3,744		1,279	2,505
Depreciation expense - Discontinued operations	2,108		315	700
Depreciation and amortization expense - Rental properties	161,492		148,337	125,662
Dispositions	(5,853)		(5,458)	0
Balance at the end of year	1,081,517		920,026	775,553
Encumbered Apartment Communities [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	1,565,599
Initial cost [Abstract]
Land	424,411
Buildings and improvements	1,295,274
Costs capitalized subsequent to acquisition	366,352
Gross amount carried at close of period [Abstract]
Land and improvements	439,119
Buildings and improvements	1,646,917
Total	2,086,036	[1]
Accumulated depreciation	(541,466)
Encumbered Apartment Communities [Member] | CA [Member] | Canyon Oaks [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Canyon Oaks
Units	250
Location	San Ramon, CA
Encumbrance	28,989
Initial cost [Abstract]
Land	19,088
Buildings and improvements	44,473
Costs capitalized subsequent to acquisition	1,338
Gross amount carried at close of period [Abstract]
Land and improvements	19,088
Buildings and improvements	45,811
Total	64,899	[1]
Accumulated depreciation	(8,857)
Date of construction	2005
Date acquired	05/07
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Sunnyvale [Member] | Brookside Oaks [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Brookside Oaks
Units	170
Location	Sunnyvale, CA
Encumbrance	19,974
Initial cost [Abstract]
Land	7,301
Buildings and improvements	16,310
Costs capitalized subsequent to acquisition	19,923
Gross amount carried at close of period [Abstract]
Land and improvements	10,328
Buildings and improvements	33,206
Total	43,534	[1]
Accumulated depreciation	(11,170)
Date of construction	1973
Date acquired	06/00
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Sunnyvale [Member] | Montclaire, The [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Montclaire, The
Units	390
Location	Sunnyvale, CA
Encumbrance	47,283
Initial cost [Abstract]
Land	4,842
Buildings and improvements	19,776
Costs capitalized subsequent to acquisition	19,907
Gross amount carried at close of period [Abstract]
Land and improvements	4,997
Buildings and improvements	39,528
Total	44,525	[1]
Accumulated depreciation	(27,380)
Date of construction	1973
Date acquired	12/88
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Sunnyvale [Member] | Summerhill Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Summerhill Park
Units	100
Location	Sunnyvale, CA
Encumbrance	13,769
Initial cost [Abstract]
Land	2,654
Buildings and improvements	4,918
Costs capitalized subsequent to acquisition	1,069
Gross amount carried at close of period [Abstract]
Land and improvements	2,656
Buildings and improvements	5,985
Total	8,641	[1]
Accumulated depreciation	(4,530)
Date of construction	1988
Date acquired	09/88
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Sunnyvale [Member] | Magnolia Square [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Magnolia Square
Units	156
Location	Sunnyvale, CA
Encumbrance	18,314
Initial cost [Abstract]
Land	8,190
Buildings and improvements	24,736
Costs capitalized subsequent to acquisition	5,097
Gross amount carried at close of period [Abstract]
Land and improvements	8,191
Buildings and improvements	29,832
Total	38,023	[1]
Accumulated depreciation	(5,069)
Date of construction	1969
Date acquired	09/07
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Los Angeles [Member] | Belmont Station [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Belmont Station
Units	275
Location	Los Angeles, CA
Encumbrance	30,045
Initial cost [Abstract]
Land	8,100
Buildings and improvements	66,666
Costs capitalized subsequent to acquisition	2,765
Gross amount carried at close of period [Abstract]
Land and improvements	8,267
Buildings and improvements	69,264
Total	77,531	[1]
Accumulated depreciation	(13,106)
Date of construction	2008
Date acquired	12/08
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Simi Valley [Member] | Hidden Valley [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Hidden Valley
Units	324
Location	Simi Valley, CA
Encumbrance	30,603
Initial cost [Abstract]
Land	14,174
Buildings and improvements	34,065
Costs capitalized subsequent to acquisition	1,404
Gross amount carried at close of period [Abstract]
Land and improvements	9,725
Buildings and improvements	39,918
Total	49,643	[1]
Accumulated depreciation	(11,368)
Date of construction	2004
Date acquired	12/04
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | San Jose [Member] | Carlyle, The [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Carlyle, The
Units	132
Location	San Jose, CA
Encumbrance	18,613
Initial cost [Abstract]
Land	3,954
Buildings and improvements	15,277
Costs capitalized subsequent to acquisition	9,847
Gross amount carried at close of period [Abstract]
Land and improvements	5,801
Buildings and improvements	23,277
Total	29,078	[1]
Accumulated depreciation	(9,265)
Date of construction	2000
Date acquired	04/00
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | San Jose [Member] | Bella Villagio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Bella Villagio
Units	231
Location	San Jose, CA
Encumbrance	38,088
Initial cost [Abstract]
Land	17,247
Buildings and improvements	40,343
Costs capitalized subsequent to acquisition	1,515
Gross amount carried at close of period [Abstract]
Land and improvements	17,247
Buildings and improvements	41,858
Total	59,105	[1]
Accumulated depreciation	(3,304)
Date of construction	2004
Date acquired	09/10
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | San Jose [Member] | Esplanade [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Esplanade
Units	278
Location	San Jose, CA
Encumbrance	44,928
Initial cost [Abstract]
Land	18,170
Buildings and improvements	40,086
Costs capitalized subsequent to acquisition	5,765
Gross amount carried at close of period [Abstract]
Land and improvements	18,429
Buildings and improvements	45,592
Total	64,021	[1]
Accumulated depreciation	(13,226)
Date of construction	2002
Date acquired	11/04
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | San Jose [Member] | Waterford, The [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Waterford, The
Units	238
Location	San Jose, CA
Encumbrance	31,975
Initial cost [Abstract]
Land	11,808
Buildings and improvements	24,500
Costs capitalized subsequent to acquisition	12,418
Gross amount carried at close of period [Abstract]
Land and improvements	15,165
Buildings and improvements	33,561
Total	48,726	[1]
Accumulated depreciation	(13,735)
Date of construction	2000
Date acquired	06/00
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Hayward [Member] | City View [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	City View
Units	572
Location	Hayward, CA
Encumbrance	63,159
Initial cost [Abstract]
Land	9,883
Buildings and improvements	37,670
Costs capitalized subsequent to acquisition	20,699
Gross amount carried at close of period [Abstract]
Land and improvements	10,350
Buildings and improvements	57,902
Total	68,252	[1]
Accumulated depreciation	(29,059)
Date of construction	1975
Date acquired	03/98
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | La Habra [Member] | Hillsborough Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Hillsborough Park
Units	235
Location	La Habra, CA
Encumbrance	37,909
Initial cost [Abstract]
Land	6,291
Buildings and improvements	15,455
Costs capitalized subsequent to acquisition	1,414
Gross amount carried at close of period [Abstract]
Land and improvements	6,272
Buildings and improvements	16,888
Total	23,160	[1]
Accumulated depreciation	(7,487)
Date of construction	1999
Date acquired	09/99
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Garden Grove [Member] | Montejo [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Montejo
Units	124
Location	Garden Grove, CA
Encumbrance	13,307
Initial cost [Abstract]
Land	1,925
Buildings and improvements	7,685
Costs capitalized subsequent to acquisition	2,264
Gross amount carried at close of period [Abstract]
Land and improvements	2,194
Buildings and improvements	9,680
Total	11,874	[1]
Accumulated depreciation	(3,760)
Date of construction	1974
Date acquired	11/01
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Santa Ana [Member] | Fairhaven Treehouse [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Fairhaven(Treehouse)
Units	164
Location	Santa Ana, CA
Encumbrance	17,269
Initial cost [Abstract]
Land	2,626
Buildings and improvements	10,485
Costs capitalized subsequent to acquisition	4,806
Gross amount carried at close of period [Abstract]
Land and improvements	2,957
Buildings and improvements	14,960
Total	17,917	[1]
Accumulated depreciation	(5,128)
Date of construction	1970
Date acquired	11/01
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Santa Ana [Member] | Brentwood [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Brentwood
Units	140
Location	Santa Ana, CA
Encumbrance	19,283
Initial cost [Abstract]
Land	2,833
Buildings and improvements	11,303
Costs capitalized subsequent to acquisition	5,482
Gross amount carried at close of period [Abstract]
Land and improvements	3,502
Buildings and improvements	16,116
Total	19,618	[1]
Accumulated depreciation	(5,786)
Date of construction	1970
Date acquired	11/01
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Fountain Valley [Member] | Valley Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Valley Park
Units	160
Location	Fountain Valley, CA
Encumbrance	22,592
Initial cost [Abstract]
Land	3,361
Buildings and improvements	13,420
Costs capitalized subsequent to acquisition	3,210
Gross amount carried at close of period [Abstract]
Land and improvements	3,761
Buildings and improvements	16,230
Total	19,991	[1]
Accumulated depreciation	(6,161)
Date of construction	1969
Date acquired	11/01
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Placentia [Member] | Villa Angelina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Villa Angelina
Units	256
Location	Placentia, CA
Encumbrance	27,542
Initial cost [Abstract]
Land	4,498
Buildings and improvements	17,962
Costs capitalized subsequent to acquisition	4,726
Gross amount carried at close of period [Abstract]
Land and improvements	4,962
Buildings and improvements	22,224
Total	27,186	[1]
Accumulated depreciation	(7,778)
Date of construction	1970
Date acquired	11/01
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Woodland Hills [Member] | Avondale at Warner Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Avondale at Warner Center
Units	446
Location	Woodland Hills, CA
Encumbrance	46,761
Initial cost [Abstract]
Land	10,536
Buildings and improvements	24,522
Costs capitalized subsequent to acquisition	14,571
Gross amount carried at close of period [Abstract]
Land and improvements	10,601
Buildings and improvements	39,028
Total	49,629	[1]
Accumulated depreciation	(19,625)
Date of construction	1970
Date acquired	01/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Newark [Member] | Bridgeport [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Bridgeport
Units	184
Location	Newark, CA
Encumbrance	21,724
Initial cost [Abstract]
Land	1,608
Buildings and improvements	7,582
Costs capitalized subsequent to acquisition	6,107
Gross amount carried at close of period [Abstract]
Land and improvements	1,525
Buildings and improvements	13,772
Total	15,297	[1]
Accumulated depreciation	(9,783)
Date of construction	1987
Date acquired	07/87
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Anaheim [Member] | Barkley, The [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Barkley, The(2)	[2]
Units	161	[2]
Location	Anaheim, CA	[2]
Encumbrance	16,784	[2]
Initial cost [Abstract]
Land	0	[2]
Buildings and improvements	8,520	[2]
Costs capitalized subsequent to acquisition	4,533	[2]
Gross amount carried at close of period [Abstract]
Land and improvements	2,353	[2]
Buildings and improvements	10,700	[2]
Total	13,053	[1],[2]
Accumulated depreciation	(4,485)	[2]
Date of construction	1984	[2]
Date acquired	04/00	[2]
Lives, minimum (in years)	3	[2]
Lives , maximum (in years)	30	[2]
Encumbered Apartment Communities [Member] | CA [Member] | San Ramon [Member] | Bel Air [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Bel Air
Units	462
Location	San Ramon, CA
Encumbrance	55,835
Initial cost [Abstract]
Land	12,105
Buildings and improvements	18,252
Costs capitalized subsequent to acquisition	22,959
Gross amount carried at close of period [Abstract]
Land and improvements	12,682
Buildings and improvements	40,634
Total	53,316	[1]
Accumulated depreciation	(18,970)
Date of construction	1988
Date acquired	01/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | San Ramon [Member] | Mill Creek at Windermere [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Mill Creek at Windermere
Units	400
Location	San Ramon, CA
Encumbrance	50,027
Initial cost [Abstract]
Land	29,551
Buildings and improvements	69,032
Costs capitalized subsequent to acquisition	1,594
Gross amount carried at close of period [Abstract]
Land and improvements	29,551
Buildings and improvements	70,626
Total	100,177	[1]
Accumulated depreciation	(12,721)
Date of construction	2005
Date acquired	09/07
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Seattle [Member] | The Bernard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	The Bernard
Units	63
Location	Seattle, CA
Encumbrance	10,064
Initial cost [Abstract]
Land	3,699
Buildings and improvements	11,345
Costs capitalized subsequent to acquisition	43
Gross amount carried at close of period [Abstract]
Land and improvements	3,689
Buildings and improvements	11,398
Total	15,087	[1]
Accumulated depreciation	(490)
Date of construction	2008
Date acquired	09/11
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Camarillo [Member] | Camarillo Oaks [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Camarillo Oaks
Units	564
Location	Camarillo, CA
Encumbrance	47,350
Initial cost [Abstract]
Land	10,953
Buildings and improvements	25,254
Costs capitalized subsequent to acquisition	2,634
Gross amount carried at close of period [Abstract]
Land and improvements	11,075
Buildings and improvements	27,766
Total	38,841	[1]
Accumulated depreciation	(15,403)
Date of construction	1985
Date acquired	07/96
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Camarillo [Member] | Camino Ruiz Square [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Camino Ruiz Square
Units	160
Location	Camarillo, CA
Encumbrance	21,110
Initial cost [Abstract]
Land	6,871
Buildings and improvements	26,119
Costs capitalized subsequent to acquisition	831
Gross amount carried at close of period [Abstract]
Land and improvements	6,931
Buildings and improvements	26,890
Total	33,821	[1]
Accumulated depreciation	(5,525)
Date of construction	1990
Date acquired	12/06
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Fullerton [Member] | Wilshire Promenade [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Wilshire Promenade
Units	149
Location	Fullerton, CA
Encumbrance	18,276
Initial cost [Abstract]
Land	3,118
Buildings and improvements	7,385
Costs capitalized subsequent to acquisition	6,683
Gross amount carried at close of period [Abstract]
Land and improvements	3,797
Buildings and improvements	13,389
Total	17,186	[1]
Accumulated depreciation	(6,013)
Date of construction	1992
Date acquired	01/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Studio City [Member] | Coldwater Canyon [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Coldwater Canyon
Units	39
Location	Studio City, CA
Encumbrance	5,538
Initial cost [Abstract]
Land	1,674
Buildings and improvements	6,640
Costs capitalized subsequent to acquisition	1,178
Gross amount carried at close of period [Abstract]
Land and improvements	1,676
Buildings and improvements	7,816
Total	9,492	[1]
Accumulated depreciation	(1,972)
Date of construction	1979
Date acquired	05/07
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Playa Vista [Member] | Fountain Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Fountain Park
Units	705
Location	Playa Vista, CA
Encumbrance	97,450
Initial cost [Abstract]
Land	25,073
Buildings and improvements	94,980
Costs capitalized subsequent to acquisition	21,849
Gross amount carried at close of period [Abstract]
Land and improvements	25,203
Buildings and improvements	116,699
Total	141,902	[1]
Accumulated depreciation	(36,486)
Date of construction	2002
Date acquired	02/04
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Santa Rosa [Member] | Harvest Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Harvest Park
Units	104
Location	Santa Rosa, CA
Encumbrance	10,691
Initial cost [Abstract]
Land	6,700
Buildings and improvements	15,479
Costs capitalized subsequent to acquisition	888
Gross amount carried at close of period [Abstract]
Land and improvements	6,690
Buildings and improvements	16,377
Total	23,067	[1]
Accumulated depreciation	(3,401)
Date of construction	2004
Date acquired	03/07
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Glendale [Member] | Hampton Place Hampton Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Hampton Place /Hampton Court
Units	215
Location	Glendale, CA
Encumbrance	21,296
Initial cost [Abstract]
Land	6,695
Buildings and improvements	16,753
Costs capitalized subsequent to acquisition	5,266
Gross amount carried at close of period [Abstract]
Land and improvements	6,733
Buildings and improvements	21,981
Total	28,714	[1]
Accumulated depreciation	(9,914)
Date of construction	1970
Date acquired	06/99
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Rancho Palos Verdes [Member] | Highridge [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Highridge
Units	255
Location	Rancho Palos Verdes, CA
Encumbrance	44,807
Initial cost [Abstract]
Land	5,419
Buildings and improvements	18,347
Costs capitalized subsequent to acquisition	23,194
Gross amount carried at close of period [Abstract]
Land and improvements	6,073
Buildings and improvements	40,887
Total	46,960	[1]
Accumulated depreciation	(17,025)
Date of construction	1972
Date acquired	05/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Issaquah [Member] | Park Hill at Issaquah [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Park Hill at Issaquah
Units	245
Location	Issaquah, CA
Encumbrance	29,477
Initial cost [Abstract]
Land	7,284
Buildings and improvements	21,937
Costs capitalized subsequent to acquisition	1,905
Gross amount carried at close of period [Abstract]
Land and improvements	7,284
Buildings and improvements	23,842
Total	31,126	[1]
Accumulated depreciation	(6,882)
Date of construction	1999
Date acquired	02/99
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Newbury Park [Member] | Hillcrest Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Hillcrest Park
Units	608
Location	Newbury Park, CA
Encumbrance	69,555
Initial cost [Abstract]
Land	15,318
Buildings and improvements	40,601
Costs capitalized subsequent to acquisition	14,623
Gross amount carried at close of period [Abstract]
Land and improvements	15,755
Buildings and improvements	54,787
Total	70,542	[1]
Accumulated depreciation	(25,168)
Date of construction	1973
Date acquired	03/98
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Huntington Beach [Member] | Huntington Breakers [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Huntington Breakers
Units	342
Location	Huntington Beach, CA
Encumbrance	38,734
Initial cost [Abstract]
Land	9,306
Buildings and improvements	22,720
Costs capitalized subsequent to acquisition	5,399
Gross amount carried at close of period [Abstract]
Land and improvements	9,315
Buildings and improvements	28,110
Total	37,425	[1]
Accumulated depreciation	(13,781)
Date of construction	1984
Date acquired	10/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Huntington Beach [Member] | The Huntington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Huntington, The
Units	276
Location	Huntington Beach, CA
Encumbrance	34,121
Initial cost [Abstract]
Land	10,374
Buildings and improvements	41,495
Costs capitalized subsequent to acquisition	646
Gross amount carried at close of period [Abstract]
Land and improvements	10,374
Buildings and improvements	42,141
Total	52,515	[1]
Accumulated depreciation	(757)
Date of construction	1975
Date acquired	06/12
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Long Beach [Member] | Marbrisa [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Marbrisa
Units	202
Location	Long Beach, CA
Encumbrance	18,959
Initial cost [Abstract]
Land	4,700
Buildings and improvements	18,605
Costs capitalized subsequent to acquisition	3,082
Gross amount carried at close of period [Abstract]
Land and improvements	4,760
Buildings and improvements	21,627
Total	26,387	[1]
Accumulated depreciation	(7,385)
Date of construction	1987
Date acquired	09/02
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Long Beach [Member] | Pathways [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Pathways
Units	296
Location	Long Beach, CA
Encumbrance	38,219
Initial cost [Abstract]
Land	4,083
Buildings and improvements	16,757
Costs capitalized subsequent to acquisition	18,076
Gross amount carried at close of period [Abstract]
Land and improvements	6,239
Buildings and improvements	32,677
Total	38,916	[1]
Accumulated depreciation	(20,789)
Date of construction	1975
Date acquired	02/91
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Marina Del Rey [Member] | Mirabella [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Mirabella
Units	188
Location	Marina Del Rey, CA
Encumbrance	46,338
Initial cost [Abstract]
Land	6,180
Buildings and improvements	26,673
Costs capitalized subsequent to acquisition	12,934
Gross amount carried at close of period [Abstract]
Land and improvements	6,270
Buildings and improvements	39,517
Total	45,787	[1]
Accumulated depreciation	(14,326)
Date of construction	2000
Date acquired	05/00
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Oxnard [Member] | Tierra Vista [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Tierra Vista
Units	404
Location	Oxnard, CA
Encumbrance	57,444
Initial cost [Abstract]
Land	13,652
Buildings and improvements	53,336
Costs capitalized subsequent to acquisition	3,030
Gross amount carried at close of period [Abstract]
Land and improvements	13,661
Buildings and improvements	56,357
Total	70,018	[1]
Accumulated depreciation	(16,376)
Date of construction	2001
Date acquired	01/01
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Fremont [Member] | Stevenson Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Stevenson Place
Units	200
Location	Fremont, CA
Encumbrance	22,034
Initial cost [Abstract]
Land	996
Buildings and improvements	5,582
Costs capitalized subsequent to acquisition	6,974
Gross amount carried at close of period [Abstract]
Land and improvements	1,001
Buildings and improvements	12,551
Total	13,552	[1]
Accumulated depreciation	(8,698)
Date of construction	1971
Date acquired	04/83
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | CA [Member] | Tiburon [Member] | Vista Belvedere [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Vista Belvedere
Units	76
Location	Tiburon, CA
Encumbrance	10,272
Initial cost [Abstract]
Land	5,573
Buildings and improvements	11,901
Costs capitalized subsequent to acquisition	4,180
Gross amount carried at close of period [Abstract]
Land and improvements	5,573
Buildings and improvements	16,081
Total	21,654	[1]
Accumulated depreciation	(5,201)
Date of construction	1963
Date acquired	08/04
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | WA [Member] | Renton [Member] | Brighton Ridge [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Brighton Ridge
Units	264
Location	Renton, WA
Encumbrance	14,644
Initial cost [Abstract]
Land	2,623
Buildings and improvements	10,800
Costs capitalized subsequent to acquisition	2,779
Gross amount carried at close of period [Abstract]
Land and improvements	2,656
Buildings and improvements	13,546
Total	16,202	[1]
Accumulated depreciation	(7,375)
Date of construction	1986
Date acquired	12/96
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | WA [Member] | Renton [Member] | Fairwood Pond [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Fairwood Pond
Units	194
Location	Renton, WA
Encumbrance	13,307
Initial cost [Abstract]
Land	5,296
Buildings and improvements	15,564
Costs capitalized subsequent to acquisition	2,054
Gross amount carried at close of period [Abstract]
Land and improvements	5,297
Buildings and improvements	17,617
Total	22,914	[1]
Accumulated depreciation	(5,257)
Date of construction	1997
Date acquired	10/04
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | WA [Member] | Mukilteo [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Anchor Village(The Elliot at Mukilteo)
Units	301
Location	Mukilteo, WA
Encumbrance	10,750
Initial cost [Abstract]
Land	2,498
Buildings and improvements	10,595
Costs capitalized subsequent to acquisition	11,861
Gross amount carried at close of period [Abstract]
Land and improvements	2,824
Buildings and improvements	22,130
Total	24,954	[1]
Accumulated depreciation	(9,585)
Date of construction	1981
Date acquired	01/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | WA [Member] | Seattle [Member] | Domaine [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Domaine
Units	92
Location	Seattle, WA
Encumbrance	16,866
Initial cost [Abstract]
Land	9,059
Buildings and improvements	27,177
Costs capitalized subsequent to acquisition	167
Gross amount carried at close of period [Abstract]
Land and improvements	9,059
Buildings and improvements	27,344
Total	36,403	[1]
Accumulated depreciation	(266)
Date of construction	2009
Date acquired	09/12
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | WA [Member] | Bothell [Member] | Canyon Pointe [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Canyon Pointe
Units	250
Location	Bothell, WA
Encumbrance	14,391
Initial cost [Abstract]
Land	4,692
Buildings and improvements	18,288
Costs capitalized subsequent to acquisition	3,507
Gross amount carried at close of period [Abstract]
Land and improvements	4,693
Buildings and improvements	21,794
Total	26,487	[1]
Accumulated depreciation	(7,095)
Date of construction	1990
Date acquired	10/03
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | WA [Member] | Bothell [Member] | Inglenook Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Inglenook Court
Units	224
Location	Bothell, WA
Encumbrance	8,300
Initial cost [Abstract]
Land	3,467
Buildings and improvements	7,881
Costs capitalized subsequent to acquisition	5,494
Gross amount carried at close of period [Abstract]
Land and improvements	3,474
Buildings and improvements	13,368
Total	16,842	[1]
Accumulated depreciation	(8,091)
Date of construction	1985
Date acquired	10/94
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | WA [Member] | Bothell [Member] | Stonehedge Village [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Stonehedge Village
Units	196
Location	Bothell, WA
Encumbrance	12,657
Initial cost [Abstract]
Land	3,167
Buildings and improvements	12,603
Costs capitalized subsequent to acquisition	4,531
Gross amount carried at close of period [Abstract]
Land and improvements	3,201
Buildings and improvements	17,100
Total	20,301	[1]
Accumulated depreciation	(8,471)
Date of construction	1986
Date acquired	10/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | WA [Member] | Bellevue [Member] | Courtyard off Main [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Courtyard off Main
Units	109
Location	Bellevue, WA
Encumbrance	16,261
Initial cost [Abstract]
Land	7,465
Buildings and improvements	21,405
Costs capitalized subsequent to acquisition	2,627
Gross amount carried at close of period [Abstract]
Land and improvements	7,465
Buildings and improvements	24,032
Total	31,497	[1]
Accumulated depreciation	(1,806)
Date of construction	2000
Date acquired	10/10
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | WA [Member] | Bellevue [Member] | Palisades, The [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Palisades, The
Units	192
Location	Bellevue, WA
Encumbrance	21,277
Initial cost [Abstract]
Land	1,560
Buildings and improvements	6,242
Costs capitalized subsequent to acquisition	10,331
Gross amount carried at close of period [Abstract]
Land and improvements	1,565
Buildings and improvements	16,568
Total	18,133	[1]
Accumulated depreciation	(10,156)
Date of construction	1977
Date acquired	05/90
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | WA [Member] | Redmond [Member] | Elevation [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Elevation
Units	157
Location	Redmond, WA
Encumbrance	11,839
Initial cost [Abstract]
Land	4,758
Buildings and improvements	14,285
Costs capitalized subsequent to acquisition	4,666
Gross amount carried at close of period [Abstract]
Land and improvements	4,757
Buildings and improvements	18,951
Total	23,708	[1]
Accumulated depreciation	(2,019)
Date of construction	1986
Date acquired	06/10
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | WA [Member] | Kirkland [Member] | Montebello [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Montebello
Units	248
Location	Kirkland, WA
Encumbrance	30,158
Initial cost [Abstract]
Land	13,857
Buildings and improvements	41,575
Costs capitalized subsequent to acquisition	3,810
Gross amount carried at close of period [Abstract]
Land and improvements	13,858
Buildings and improvements	45,384
Total	59,242	[1]
Accumulated depreciation	(684)
Date of construction	1996
Date acquired	07/12
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | WA [Member] | Issaquah [Member] | Highlands at Wynhaven [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Highlands at Wynhaven
Units	333
Location	Issaquah, WA
Encumbrance	33,343
Initial cost [Abstract]
Land	16,271
Buildings and improvements	48,932
Costs capitalized subsequent to acquisition	4,331
Gross amount carried at close of period [Abstract]
Land and improvements	16,271
Buildings and improvements	53,263
Total	69,534	[1]
Accumulated depreciation	(8,371)
Date of construction	2000
Date acquired	08/08
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Encumbered Apartment Communities [Member] | WA [Member] | Kent [Member] | Wandering Creek [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Wandering Creek
Units	156
Location	Kent, WA
Encumbrance	5,300
Initial cost [Abstract]
Land	1,285
Buildings and improvements	4,980
Costs capitalized subsequent to acquisition	3,366
Gross amount carried at close of period [Abstract]
Land and improvements	1,296
Buildings and improvements	8,335
Total	9,631	[1]
Accumulated depreciation	(4,945)
Date of construction	1986
Date acquired	11/95
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member]
Real Estate and Accumulated Depreciation [Line Items]
Units	29,207
Encumbrance	1,565,599
Initial cost [Abstract]
Land	948,416
Buildings and improvements	3,263,992
Costs capitalized subsequent to acquisition	740,286
Gross amount carried at close of period [Abstract]
Land and improvements	980,247
Buildings and improvements	3,972,447
Total	4,952,694	[1]
Accumulated depreciation	(1,062,438)
Unencumbered Apartment Communities [Member] | Seattle [Member] | Wharfside Pointe [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Wharfside Pointe
Units	142
Location	Seattle, WA
Initial cost [Abstract]
Land	2,245
Buildings and improvements	7,020
Costs capitalized subsequent to acquisition	6,010
Gross amount carried at close of period [Abstract]
Land and improvements	2,258
Buildings and improvements	13,017
Total	15,275	[1]
Accumulated depreciation	(6,954)
Date of construction	1990
Date acquired	06/94
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Bonita [Member] | Bonita Cedars [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Bonita Cedars
Units	120
Location	Bonita, CA
Initial cost [Abstract]
Land	2,496
Buildings and improvements	9,913
Costs capitalized subsequent to acquisition	1,584
Gross amount carried at close of period [Abstract]
Land and improvements	2,503
Buildings and improvements	11,490
Total	13,993	[1]
Accumulated depreciation	(4,124)
Date of construction	1983
Date acquired	12/02
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Sunnyvale [Member] | Reed Square [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Reed Square
Units	100
Location	Sunnyvale, CA
Initial cost [Abstract]
Land	6,873
Buildings and improvements	16,037
Costs capitalized subsequent to acquisition	1,897
Gross amount carried at close of period [Abstract]
Land and improvements	6,873
Buildings and improvements	17,934
Total	24,807	[1]
Accumulated depreciation	(550)
Date of construction	1970
Date acquired	01/12
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Sunnyvale [Member] | Bristol Commons [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Bristol Commons
Units	188
Location	Sunnyvale, CA
Initial cost [Abstract]
Land	5,278
Buildings and improvements	11,853
Costs capitalized subsequent to acquisition	2,033
Gross amount carried at close of period [Abstract]
Land and improvements	5,293
Buildings and improvements	13,871
Total	19,164	[1]
Accumulated depreciation	(7,384)
Date of construction	1989
Date acquired	01/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Sunnyvale [Member] | Windsor Ridge [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Windsor Ridge
Units	216
Location	Sunnyvale, CA
Initial cost [Abstract]
Land	4,017
Buildings and improvements	10,315
Costs capitalized subsequent to acquisition	6,281
Gross amount carried at close of period [Abstract]
Land and improvements	4,021
Buildings and improvements	16,592
Total	20,613	[1]
Accumulated depreciation	(11,252)
Date of construction	1989
Date acquired	03/89
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Sunnyvale [Member] | Magnolia Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Magnolia Lane(4)	[3]
Units	32	[3]
Location	Sunnyvale, CA	[3]
Initial cost [Abstract]
Land	0	[3]
Buildings and improvements	5,430	[3]
Costs capitalized subsequent to acquisition	210	[3]
Gross amount carried at close of period [Abstract]
Land and improvements	0	[3]
Buildings and improvements	5,640	[3]
Total	5,640	[1],[3]
Accumulated depreciation	(1,080)	[3]
Date of construction	2001	[3]
Date acquired	06/07	[3]
Lives, minimum (in years)	3	[3]
Lives , maximum (in years)	30	[3]
Unencumbered Apartment Communities [Member] | CA [Member] | Sunnyvale [Member] | Via [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Via
Units	284
Location	Sunnyvale, CA
Initial cost [Abstract]
Land	22,000
Buildings and improvements	82,270
Costs capitalized subsequent to acquisition	169
Gross amount carried at close of period [Abstract]
Land and improvements	22,016
Buildings and improvements	82,423
Total	104,439	[1]
Accumulated depreciation	(4,617)
Date of construction	2011
Date acquired	07/11
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Los Angeles [Member] | Park Catalina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Park Catalina
Units	90
Location	Los Angeles, CA
Initial cost [Abstract]
Land	4,710
Buildings and improvements	18,839
Costs capitalized subsequent to acquisition	293
Gross amount carried at close of period [Abstract]
Land and improvements	4,710
Buildings and improvements	19,132
Total	23,842	[1]
Accumulated depreciation	(346)
Date of construction	2002
Date acquired	06/12
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Los Angeles [Member] | Miracle Mile Marbella [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Miracle Mile/Marbella
Units	236
Location	Los Angeles, CA
Initial cost [Abstract]
Land	7,791
Buildings and improvements	23,075
Costs capitalized subsequent to acquisition	10,885
Gross amount carried at close of period [Abstract]
Land and improvements	7,886
Buildings and improvements	33,865
Total	41,751	[1]
Accumulated depreciation	(15,215)
Date of construction	1988
Date acquired	08/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Los Angeles [Member] | Bunker Hill [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Bunker Hill
Units	456
Location	Los Angeles, CA
Initial cost [Abstract]
Land	11,498
Buildings and improvements	27,871
Costs capitalized subsequent to acquisition	7,472
Gross amount carried at close of period [Abstract]
Land and improvements	11,639
Buildings and improvements	35,202
Total	46,841	[1]
Accumulated depreciation	(15,732)
Date of construction	1968
Date acquired	03/98
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Los Angeles [Member] | Kings Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Kings Road
Units	196
Location	Los Angeles, CA
Initial cost [Abstract]
Land	4,023
Buildings and improvements	9,527
Costs capitalized subsequent to acquisition	7,646
Gross amount carried at close of period [Abstract]
Land and improvements	4,031
Buildings and improvements	17,165
Total	21,196	[1]
Accumulated depreciation	(7,801)
Date of construction	1979
Date acquired	06/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Los Angeles [Member] | Santee Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Santee Court
Units	165
Location	Los Angeles, CA
Initial cost [Abstract]
Land	6,177
Buildings and improvements	24,716
Costs capitalized subsequent to acquisition	956
Gross amount carried at close of period [Abstract]
Land and improvements	6,177
Buildings and improvements	25,672
Total	31,849	[1]
Accumulated depreciation	(1,992)
Date of construction	2004
Date acquired	10/10
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Los Angeles [Member] | Bellerive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Bellerive
Units	63
Location	Los Angeles, CA
Initial cost [Abstract]
Land	5,401
Buildings and improvements	21,803
Costs capitalized subsequent to acquisition	517
Gross amount carried at close of period [Abstract]
Land and improvements	5,401
Buildings and improvements	22,320
Total	27,721	[1]
Accumulated depreciation	(1,347)
Date of construction	2011
Date acquired	08/11
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Los Angeles [Member] | Santee Village [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Santee Village
Units	73
Location	Los Angeles, CA
Initial cost [Abstract]
Land	3,404
Buildings and improvements	15,601
Costs capitalized subsequent to acquisition	1,391
Gross amount carried at close of period [Abstract]
Land and improvements	3,404
Buildings and improvements	16,992
Total	20,396	[1]
Accumulated depreciation	(997)
Date of construction	2011
Date acquired	07/11
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Simi Valley [Member] | Meadoweood [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Meadoweood
Units	320
Location	Simi Valley, CA
Initial cost [Abstract]
Land	7,852
Buildings and improvements	18,592
Costs capitalized subsequent to acquisition	5,498
Gross amount carried at close of period [Abstract]
Land and improvements	7,898
Buildings and improvements	24,044
Total	31,942	[1]
Accumulated depreciation	(12,206)
Date of construction	1986
Date acquired	11/96
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Mira Mesa [Member] | Mira Monte [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Mira Monte
Units	355
Location	Mira Mesa, CA
Initial cost [Abstract]
Land	7,165
Buildings and improvements	28,459
Costs capitalized subsequent to acquisition	7,652
Gross amount carried at close of period [Abstract]
Land and improvements	7,186
Buildings and improvements	36,090
Total	43,276	[1]
Accumulated depreciation	(14,088)
Date of construction	1982
Date acquired	12/02
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Oceanside [Member] | Mission Hills [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Mission Hills
Units	282
Location	Oceanside, CA
Initial cost [Abstract]
Land	10,099
Buildings and improvements	38,778
Costs capitalized subsequent to acquisition	3,677
Gross amount carried at close of period [Abstract]
Land and improvements	10,167
Buildings and improvements	42,387
Total	52,554	[1]
Accumulated depreciation	(11,755)
Date of construction	1984
Date acquired	07/05
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Oceanside [Member] | Country Villas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Country Villas
Units	180
Location	Oceanside, CA
Initial cost [Abstract]
Land	4,174
Buildings and improvements	16,583
Costs capitalized subsequent to acquisition	2,443
Gross amount carried at close of period [Abstract]
Land and improvements	4,187
Buildings and improvements	19,013
Total	23,200	[1]
Accumulated depreciation	(6,884)
Date of construction	1976
Date acquired	12/02
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Lake Forest [Member] | Trabucco Villas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Trabucco Villas
Units	132
Location	Lake Forest, CA
Initial cost [Abstract]
Land	3,638
Buildings and improvements	8,640
Costs capitalized subsequent to acquisition	2,035
Gross amount carried at close of period [Abstract]
Land and improvements	3,890
Buildings and improvements	10,423
Total	14,313	[1]
Accumulated depreciation	(4,949)
Date of construction	1985
Date acquired	10/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Walnut [Member] | Walnut Heights [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Walnut Heights
Units	163
Location	Walnut, CA
Initial cost [Abstract]
Land	4,858
Buildings and improvements	19,168
Costs capitalized subsequent to acquisition	2,212
Gross amount carried at close of period [Abstract]
Land and improvements	4,887
Buildings and improvements	21,351
Total	26,238	[1]
Accumulated depreciation	(6,775)
Date of construction	1964
Date acquired	10/03
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | San Jose [Member] | Willow Lake [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Willow Lake
Units	508
Location	San Jose, CA
Initial cost [Abstract]
Land	43,194
Buildings and improvements	101,030
Costs capitalized subsequent to acquisition	857
Gross amount carried at close of period [Abstract]
Land and improvements	43,194
Buildings and improvements	101,887
Total	145,081	[1]
Accumulated depreciation	(707)
Date of construction	1989
Date acquired	10/12
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | San Jose [Member] | 101 San Fernando [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	101 San Fernando
Units	323
Location	San Jose, CA
Initial cost [Abstract]
Land	4,173
Buildings and improvements	58,961
Costs capitalized subsequent to acquisition	3,678
Gross amount carried at close of period [Abstract]
Land and improvements	4,173
Buildings and improvements	62,639
Total	66,812	[1]
Accumulated depreciation	(5,392)
Date of construction	2001
Date acquired	07/10
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Santa Ana [Member] | Essex Skyline at MacAuthur Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Essex Skyline at MacAuthur Place
Units	349
Location	Santa Ana, CA
Initial cost [Abstract]
Land	21,537
Buildings and improvements	146,099
Costs capitalized subsequent to acquisition	463
Gross amount carried at close of period [Abstract]
Land and improvements	21,537
Buildings and improvements	146,562
Total	168,099	[1]
Accumulated depreciation	(3,536)
Date of construction	2008
Date acquired	04/12
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Alpine [Member] | Alpine Village [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Alpine Village
Units	301
Location	Alpine, CA
Initial cost [Abstract]
Land	4,967
Buildings and improvements	19,728
Costs capitalized subsequent to acquisition	3,690
Gross amount carried at close of period [Abstract]
Land and improvements	4,982
Buildings and improvements	23,403
Total	28,385	[1]
Accumulated depreciation	(8,158)
Date of construction	1971
Date acquired	12/02
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Anaheim [Member] | Anavia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Anavia
Units	250
Location	Anaheim, CA
Initial cost [Abstract]
Land	15,925
Buildings and improvements	63,712
Costs capitalized subsequent to acquisition	5,469
Gross amount carried at close of period [Abstract]
Land and improvements	15,925
Buildings and improvements	69,181
Total	85,106	[1]
Accumulated depreciation	(4,704)
Date of construction	2009
Date acquired	12/10
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | San Ramon [Member] | Foothill Gardens/Twin Creeks [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Foothill Gardens/Twin Creeks
Units	176
Location	San Ramon, CA
Initial cost [Abstract]
Land	5,875
Buildings and improvements	13,992
Costs capitalized subsequent to acquisition	4,360
Gross amount carried at close of period [Abstract]
Land and improvements	5,964
Buildings and improvements	18,263
Total	24,227	[1]
Accumulated depreciation	(9,093)
Date of construction	1985
Date acquired	02/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Fullerton [Member] | Capri at Sunny Hills [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Capri at Sunny Hills
Units	100
Location	Fullerton, CA
Initial cost [Abstract]
Land	3,337
Buildings and improvements	13,320
Costs capitalized subsequent to acquisition	6,230
Gross amount carried at close of period [Abstract]
Land and improvements	4,048
Buildings and improvements	18,839
Total	22,887	[1]
Accumulated depreciation	(6,863)
Date of construction	1961
Date acquired	09/01
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Hemet [Member] | Devonshire [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Devonshire
Units	276
Location	Hemet, CA
Initial cost [Abstract]
Land	3,470
Buildings and improvements	13,786
Costs capitalized subsequent to acquisition	2,282
Gross amount carried at close of period [Abstract]
Land and improvements	3,482
Buildings and improvements	16,056
Total	19,538	[1]
Accumulated depreciation	(5,780)
Date of construction	1988
Date acquired	12/02
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Kirkland [Member] | Ascent [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Ascent
Units	90
Location	Kirkland, CA
Initial cost [Abstract]
Land	3,924
Buildings and improvements	11,862
Costs capitalized subsequent to acquisition	271
Gross amount carried at close of period [Abstract]
Land and improvements	3,924
Buildings and improvements	12,133
Total	16,057	[1]
Accumulated depreciation	(86)
Date of construction	1988
Date acquired	10/12
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Glendale [Member] | 416 on Broadway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	416 on Broadway
Units	115
Location	Glendale, CA
Initial cost [Abstract]
Land	8,557
Buildings and improvements	34,235
Costs capitalized subsequent to acquisition	756
Gross amount carried at close of period [Abstract]
Land and improvements	8,557
Buildings and improvements	34,991
Total	43,548	[1]
Accumulated depreciation	(2,448)
Date of construction	2009
Date acquired	12/10
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Santa Clara [Member] | Le Parc Luxury Apartments [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Le Parc Luxury Apartments
Units	140
Location	Santa Clara, CA
Initial cost [Abstract]
Land	3,090
Buildings and improvements	7,421
Costs capitalized subsequent to acquisition	10,766
Gross amount carried at close of period [Abstract]
Land and improvements	3,092
Buildings and improvements	18,185
Total	21,277	[1]
Accumulated depreciation	(9,041)
Date of construction	1975
Date acquired	02/94
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Santa Clara [Member] | Marina Cove [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Marina Cove(6)	[4]
Units	292	[4]
Location	Santa Clara, CA	[4]
Initial cost [Abstract]
Land	5,320	[4]
Buildings and improvements	16,431	[4]
Costs capitalized subsequent to acquisition	8,311	[4]
Gross amount carried at close of period [Abstract]
Land and improvements	5,324	[4]
Buildings and improvements	24,738	[4]
Total	30,062	[1],[4]
Accumulated depreciation	(13,558)	[4]
Date of construction	1974	[4]
Date acquired	06/94	[4]
Lives, minimum (in years)	3	[4]
Lives , maximum (in years)	30	[4]
Unencumbered Apartment Communities [Member] | CA [Member] | Santa Clara [Member] | 1000 Kiely
Real Estate and Accumulated Depreciation [Line Items]
Property	1000 Kiely
Units	121
Location	Santa Clara, CA
Initial cost [Abstract]
Land	9,359
Buildings and improvements	21,845
Costs capitalized subsequent to acquisition	3,675
Gross amount carried at close of period [Abstract]
Land and improvements	9,359
Buildings and improvements	25,520
Total	34,879	[1]
Accumulated depreciation	(1,590)
Date of construction	1971
Date acquired	03/11
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Marina Del Rey [Member] | Marina City Club [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Marina City Club(5)	[5]
Units	101	[5]
Location	Marina Del Rey, CA	[5]
Initial cost [Abstract]
Land	0	[5]
Buildings and improvements	28,167	[5]
Costs capitalized subsequent to acquisition	6,696	[5]
Gross amount carried at close of period [Abstract]
Land and improvements	0	[5]
Buildings and improvements	34,863	[5]
Total	34,863	[1],[5]
Accumulated depreciation	(10,453)	[5]
Date of construction	1971	[5]
Date acquired	01/04	[5]
Lives, minimum (in years)	3	[5]
Lives , maximum (in years)	30	[5]
Unencumbered Apartment Communities [Member] | CA [Member] | Oxnard [Member] | Monterey Villas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Monterey Villas
Units	122
Location	Oxnard, CA
Initial cost [Abstract]
Land	2,349
Buildings and improvements	5,579
Costs capitalized subsequent to acquisition	5,217
Gross amount carried at close of period [Abstract]
Land and improvements	2,424
Buildings and improvements	10,721
Total	13,145	[1]
Accumulated depreciation	(4,670)
Date of construction	1974
Date acquired	07/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Oxnard [Member] | Mariners Place [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Mariners Place
Units	105
Location	Oxnard, CA
Initial cost [Abstract]
Land	1,555
Buildings and improvements	6,103
Costs capitalized subsequent to acquisition	1,748
Gross amount carried at close of period [Abstract]
Land and improvements	1,562
Buildings and improvements	7,844
Total	9,406	[1]
Accumulated depreciation	(3,476)
Date of construction	1987
Date acquired	05/00
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Cupertino [Member] | Pointe at Cupertino, The [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Pointe at Cupertino, The
Units	116
Location	Cupertino, CA
Initial cost [Abstract]
Land	4,505
Buildings and improvements	17,605
Costs capitalized subsequent to acquisition	8,388
Gross amount carried at close of period [Abstract]
Land and improvements	4,505
Buildings and improvements	25,993
Total	30,498	[1]
Accumulated depreciation	(6,545)
Date of construction	1963
Date acquired	08/98
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Richmond [Member] | San Marcos [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	San Marcos
Units	432
Location	Richmond, CA
Initial cost [Abstract]
Land	15,563
Buildings and improvements	36,204
Costs capitalized subsequent to acquisition	26,282
Gross amount carried at close of period [Abstract]
Land and improvements	22,866
Buildings and improvements	55,183
Total	78,049	[1]
Accumulated depreciation	(17,358)
Date of construction	2003
Date acquired	11/03
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Fremont [Member] | Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Boulevard
Units	172
Location	Fremont, CA
Initial cost [Abstract]
Land	3,520
Buildings and improvements	8,182
Costs capitalized subsequent to acquisition	10,469
Gross amount carried at close of period [Abstract]
Land and improvements	3,580
Buildings and improvements	18,591
Total	22,171	[1]
Accumulated depreciation	(9,989)
Date of construction	1978
Date acquired	01/96
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | San Diego [Member] | CentrePointe The Bluffs II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	CentrePointe (The Bluffs II)
Units	224
Location	San Diego, CA
Initial cost [Abstract]
Land	3,405
Buildings and improvements	7,743
Costs capitalized subsequent to acquisition	14,218
Gross amount carried at close of period [Abstract]
Land and improvements	3,442
Buildings and improvements	21,924
Total	25,366	[1]
Accumulated depreciation	(5,977)
Date of construction	1974
Date acquired	06/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | San Diego [Member] | Summit Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Summit Park
Units	300
Location	San Diego, CA
Initial cost [Abstract]
Land	5,959
Buildings and improvements	23,670
Costs capitalized subsequent to acquisition	3,273
Gross amount carried at close of period [Abstract]
Land and improvements	5,977
Buildings and improvements	26,925
Total	32,902	[1]
Accumulated depreciation	(9,704)
Date of construction	1972
Date acquired	12/02
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | San Diego [Member] | Vista Capri - North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Vista Capri - North
Units	106
Location	San Diego, CA
Initial cost [Abstract]
Land	1,663
Buildings and improvements	6,609
Costs capitalized subsequent to acquisition	830
Gross amount carried at close of period [Abstract]
Land and improvements	1,668
Buildings and improvements	7,434
Total	9,102	[1]
Accumulated depreciation	(2,526)
Date of construction	1975
Date acquired	12/02
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Valley Village [Member] | Allegro [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Allegro
Units	97
Location	Valley Village, CA
Initial cost [Abstract]
Land	5,869
Buildings and improvements	23,977
Costs capitalized subsequent to acquisition	949
Gross amount carried at close of period [Abstract]
Land and improvements	5,869
Buildings and improvements	24,926
Total	30,795	[1]
Accumulated depreciation	(2,624)
Date of construction	2010
Date acquired	10/10
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Irvine [Member] | Axis 2300 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Axis 2300
Units	115
Location	Irvine, CA
Initial cost [Abstract]
Land	5,405
Buildings and improvements	33,585
Costs capitalized subsequent to acquisition	518
Gross amount carried at close of period [Abstract]
Land and improvements	5,405
Buildings and improvements	34,103
Total	39,508	[1]
Accumulated depreciation	(3,659)
Date of construction	2010
Date acquired	08/10
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Belmont [Member] | Belmont Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Belmont Terrace
Units	71
Location	Belmont, CA
Initial cost [Abstract]
Land	4,446
Buildings and improvements	10,290
Costs capitalized subsequent to acquisition	2,250
Gross amount carried at close of period [Abstract]
Land and improvements	4,473
Buildings and improvements	12,513
Total	16,986	[1]
Accumulated depreciation	(3,635)
Date of construction	1974
Date acquired	10/06
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Chula Vista [Member] | Cambridge [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Cambridge
Units	40
Location	Chula Vista, CA
Initial cost [Abstract]
Land	497
Buildings and improvements	1,973
Costs capitalized subsequent to acquisition	324
Gross amount carried at close of period [Abstract]
Land and improvements	498
Buildings and improvements	2,296
Total	2,794	[1]
Accumulated depreciation	(831)
Date of construction	1965
Date acquired	12/02
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Goleta [Member] | The Sweep Apartments [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	The Sweep Apartments
Units	91
Location	Goleta, CA
Initial cost [Abstract]
Land	5,558
Buildings and improvements	21,320
Costs capitalized subsequent to acquisition	1,866
Gross amount carried at close of period [Abstract]
Land and improvements	5,618
Buildings and improvements	23,126
Total	28,744	[1]
Accumulated depreciation	(6,481)
Date of construction	1967
Date acquired	01/06
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Goleta [Member] | CBC Apartments [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	CBC Apartments
Units	148
Location	Goleta, CA
Initial cost [Abstract]
Land	6,283
Buildings and improvements	24,000
Costs capitalized subsequent to acquisition	2,418
Gross amount carried at close of period [Abstract]
Land and improvements	6,288
Buildings and improvements	26,413
Total	32,701	[1]
Accumulated depreciation	(6,800)
Date of construction	1962
Date acquired	01/06
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Santa Cruz [Member] | Chestnut Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Chestnut Street
Units	96
Location	Santa Cruz, CA
Initial cost [Abstract]
Land	6,582
Buildings and improvements	15,689
Costs capitalized subsequent to acquisition	955
Gross amount carried at close of period [Abstract]
Land and improvements	6,582
Buildings and improvements	16,644
Total	23,226	[1]
Accumulated depreciation	(2,602)
Date of construction	2002
Date acquired	07/08
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Campbell [Member] | The Commons [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Commons, The
Units	264
Location	Campbell, CA
Initial cost [Abstract]
Land	12,555
Buildings and improvements	29,307
Costs capitalized subsequent to acquisition	3,566
Gross amount carried at close of period [Abstract]
Land and improvements	12,556
Buildings and improvements	32,872
Total	45,428	[1]
Accumulated depreciation	(3,067)
Date of construction	1973
Date acquired	07/10
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Pasadena [Member] | Monterra del Mar/Rey/Sol [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Monterra del Mar/Rey/Sol
Units	292
Location	Pasadena, CA
Initial cost [Abstract]
Land	2,202
Buildings and improvements	4,794
Costs capitalized subsequent to acquisition	28,101
Gross amount carried at close of period [Abstract]
Land and improvements	8,385
Buildings and improvements	26,712
Total	35,097	[1]
Accumulated depreciation	(12,072)
Date of construction	1972
Date acquired	04/99
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Newport Beach [Member] | Fairways [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Fairways(3)	[6]
Units	74	[6]
Location	Newport Beach, CA	[6]
Initial cost [Abstract]
Land	0	[6]
Buildings and improvements	7,850	[6]
Costs capitalized subsequent to acquisition	4,218	[6]
Gross amount carried at close of period [Abstract]
Land and improvements	9	[6]
Buildings and improvements	12,059	[6]
Total	12,068	[1],[6]
Accumulated depreciation	(4,634)	[6]
Date of construction	1972	[6]
Date acquired	06/99	[6]
Lives, minimum (in years)	3	[6]
Lives , maximum (in years)	30	[6]
Unencumbered Apartment Communities [Member] | CA [Member] | Berkeley [Member] | Fourth & U [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Fourth & U
Units	171
Location	Berkeley, CA
Initial cost [Abstract]
Land	8,879
Buildings and improvements	52,351
Costs capitalized subsequent to acquisition	1,821
Gross amount carried at close of period [Abstract]
Land and improvements	8,879
Buildings and improvements	54,172
Total	63,051	[1]
Accumulated depreciation	(5,429)
Date of construction	2010
Date acquired	04/10
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | San Mateo [Member] | Hillsdale Garden Apartments [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Hillsdale Garden Apartments
Units	697
Location	San Mateo, CA
Initial cost [Abstract]
Land	22,000
Buildings and improvements	94,681
Costs capitalized subsequent to acquisition	17,407
Gross amount carried at close of period [Abstract]
Land and improvements	22,244
Buildings and improvements	111,844
Total	134,088	[1]
Accumulated depreciation	(23,317)
Date of construction	1948
Date acquired	09/06
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Santa Barbara [Member] | Hope Ranch Collection [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Hope Ranch Collection
Units	108
Location	Santa Barbara, CA
Initial cost [Abstract]
Land	4,078
Buildings and improvements	16,877
Costs capitalized subsequent to acquisition	2,291
Gross amount carried at close of period [Abstract]
Land and improvements	4,208
Buildings and improvements	19,038
Total	23,246	[1]
Accumulated depreciation	(3,366)
Date of construction	1965
Date acquired	03/07
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Ventura [Member] | Lofts at Pinehurst, The [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Lofts at Pinehurst, The
Units	118
Location	Ventura, CA
Initial cost [Abstract]
Land	1,570
Buildings and improvements	3,912
Costs capitalized subsequent to acquisition	4,197
Gross amount carried at close of period [Abstract]
Land and improvements	1,618
Buildings and improvements	8,061
Total	9,679	[1]
Accumulated depreciation	(3,461)
Date of construction	1971
Date acquired	06/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Ventura [Member] | Pinehurst [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Pinehurst(7)	[7]
Units	28	[7]
Location	Ventura, CA	[7]
Initial cost [Abstract]
Land	355	[7]
Buildings and improvements	1,356	[7]
Costs capitalized subsequent to acquisition	377	[7]
Gross amount carried at close of period [Abstract]
Land and improvements	6	[7]
Buildings and improvements	2,082	[7]
Total	2,088	[1],[7]
Accumulated depreciation	(733)	[7]
Date of construction	1973	[7]
Date acquired	12/04	[7]
Lives, minimum (in years)	3	[7]
Lives , maximum (in years)	30	[7]
Unencumbered Apartment Communities [Member] | CA [Member] | Ventura [Member] | Woodside Village [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Woodside Village
Units	145
Location	Ventura, CA
Initial cost [Abstract]
Land	5,331
Buildings and improvements	21,036
Costs capitalized subsequent to acquisition	2,828
Gross amount carried at close of period [Abstract]
Land and improvements	5,341
Buildings and improvements	23,854
Total	29,195	[1]
Accumulated depreciation	(6,678)
Date of construction	1987
Date acquired	12/04
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Clairemont [Member] | Mesa Village [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Mesa Village
Units	133
Location	Clairemont, CA
Initial cost [Abstract]
Land	1,888
Buildings and improvements	7,498
Costs capitalized subsequent to acquisition	1,001
Gross amount carried at close of period [Abstract]
Land and improvements	1,894
Buildings and improvements	8,493
Total	10,387	[1]
Accumulated depreciation	(2,890)
Date of construction	1963
Date acquired	12/02
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | San Francisco [Member] | Park West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Park West
Units	126
Location	San Francisco, CA
Initial cost [Abstract]
Land	9,424
Buildings and improvements	21,988
Costs capitalized subsequent to acquisition	659
Gross amount carried at close of period [Abstract]
Land and improvements	9,424
Buildings and improvements	22,647
Total	32,071	[1]
Accumulated depreciation	(215)
Date of construction	1958
Date acquired	09/12
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | San Francisco [Member] | Bennett Lofts [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Bennett Lofts
Units	113
Location	San Francisco, CA
Initial cost [Abstract]
Land	21,771
Buildings and improvements	50,800
Costs capitalized subsequent to acquisition	80
Gross amount carried at close of period [Abstract]
Land and improvements	21,771
Buildings and improvements	50,880
Total	72,651	[1]
Accumulated depreciation	(212)
Date of construction	2004
Date acquired	12/12
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | San Francisco [Member] | Mt. Sutro [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Mt. Sutro
Units	99
Location	San Francisco, CA
Initial cost [Abstract]
Land	2,334
Buildings and improvements	8,507
Costs capitalized subsequent to acquisition	2,988
Gross amount carried at close of period [Abstract]
Land and improvements	2,809
Buildings and improvements	11,020
Total	13,829	[1]
Accumulated depreciation	(4,924)
Date of construction	1973
Date acquired	06/01
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Encino [Member] | Regency at Encino [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Regency at Encino
Units	75
Location	Encino, CA
Initial cost [Abstract]
Land	3,184
Buildings and improvements	12,737
Costs capitalized subsequent to acquisition	1,348
Gross amount carried at close of period [Abstract]
Land and improvements	3,184
Buildings and improvements	14,084
Total	17,268	[1]
Accumulated depreciation	(1,730)
Date of construction	1989
Date acquired	12/09
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Spring Valley [Member] | Shadow Point [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Shadow Point
Units	172
Location	Spring Valley, CA
Initial cost [Abstract]
Land	2,812
Buildings and improvements	11,170
Costs capitalized subsequent to acquisition	1,747
Gross amount carried at close of period [Abstract]
Land and improvements	2,820
Buildings and improvements	12,909
Total	15,729	[1]
Accumulated depreciation	(4,606)
Date of construction	1983
Date acquired	12/02
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Oakland [Member] | The Grand [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	The Grand
Units	243
Location	Oakland, CA
Initial cost [Abstract]
Land	4,531
Buildings and improvements	89,208
Costs capitalized subsequent to acquisition	3,969
Gross amount carried at close of period [Abstract]
Land and improvements	4,531
Buildings and improvements	93,177
Total	97,708	[1]
Accumulated depreciation	(13,803)
Date of construction	2009
Date acquired	01/09
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Tracy [Member] | Tuscana [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Tuscana
Units	30
Location	Tracy, CA
Initial cost [Abstract]
Land	2,828
Buildings and improvements	6,599
Costs capitalized subsequent to acquisition	154
Gross amount carried at close of period [Abstract]
Land and improvements	2,870
Buildings and improvements	6,711
Total	9,581	[1]
Accumulated depreciation	(1,260)
Date of construction	2007
Date acquired	02/07
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | CA [Member] | Hollywood [Member] | Muse [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Muse
Units	152
Location	Hollywood, CA
Initial cost [Abstract]
Land	7,822
Buildings and improvements	33,436
Costs capitalized subsequent to acquisition	1,136
Gross amount carried at close of period [Abstract]
Land and improvements	7,823
Buildings and improvements	34,571
Total	42,394	[1]
Accumulated depreciation	(3,117)
Date of construction	2011
Date acquired	02/11
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Newcastle [Member] | Castle Creek [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Castle Creek
Units	216
Location	Newcastle, WA
Initial cost [Abstract]
Land	4,149
Buildings and improvements	16,028
Costs capitalized subsequent to acquisition	2,097
Gross amount carried at close of period [Abstract]
Land and improvements	4,833
Buildings and improvements	17,441
Total	22,274	[1]
Accumulated depreciation	(9,292)
Date of construction	1997
Date acquired	12/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Renton [Member] | Forest View [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Forest View
Units	192
Location	Renton, WA
Initial cost [Abstract]
Land	3,731
Buildings and improvements	14,530
Costs capitalized subsequent to acquisition	1,212
Gross amount carried at close of period [Abstract]
Land and improvements	3,731
Buildings and improvements	15,742
Total	19,473	[1]
Accumulated depreciation	(5,132)
Date of construction	1998
Date acquired	10/03
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Seattle [Member] | Cairns, The [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Cairns, The
Units	100
Location	Seattle, WA
Initial cost [Abstract]
Land	6,937
Buildings and improvements	20,679
Costs capitalized subsequent to acquisition	364
Gross amount carried at close of period [Abstract]
Land and improvements	6,939
Buildings and improvements	21,041
Total	27,980	[1]
Accumulated depreciation	(3,941)
Date of construction	2006
Date acquired	06/07
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Seattle [Member] | Joule [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Joule
Units	295
Location	Seattle, WA
Initial cost [Abstract]
Land	14,558
Buildings and improvements	69,417
Costs capitalized subsequent to acquisition	2,473
Gross amount carried at close of period [Abstract]
Land and improvements	14,558
Buildings and improvements	71,890
Total	86,448	[1]
Accumulated depreciation	(7,421)
Date of construction	2010
Date acquired	03/10
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Seattle [Member] | Fountain Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Fountain Court
Units	320
Location	Seattle, WA
Initial cost [Abstract]
Land	6,702
Buildings and improvements	27,306
Costs capitalized subsequent to acquisition	4,214
Gross amount carried at close of period [Abstract]
Land and improvements	6,985
Buildings and improvements	31,237
Total	38,222	[1]
Accumulated depreciation	(13,626)
Date of construction	2000
Date acquired	03/00
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Seattle [Member] | Linden Square [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Linden Square
Units	183
Location	Seattle, WA
Initial cost [Abstract]
Land	4,374
Buildings and improvements	11,588
Costs capitalized subsequent to acquisition	1,886
Gross amount carried at close of period [Abstract]
Land and improvements	4,202
Buildings and improvements	13,646
Total	17,848	[1]
Accumulated depreciation	(5,673)
Date of construction	1994
Date acquired	06/00
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Bothell [Member] | Salmon Run at Perry Creek [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Salmon Run at Perry Creek
Units	132
Location	Bothell, WA
Initial cost [Abstract]
Land	3,717
Buildings and improvements	11,483
Costs capitalized subsequent to acquisition	1,119
Gross amount carried at close of period [Abstract]
Land and improvements	3,801
Buildings and improvements	12,518
Total	16,319	[1]
Accumulated depreciation	(5,024)
Date of construction	2000
Date acquired	10/00
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Bellevue [Member] | Emerald Ridge - North [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Emerald Ridge - North
Units	180
Location	Bellevue, WA
Initial cost [Abstract]
Land	3,449
Buildings and improvements	7,801
Costs capitalized subsequent to acquisition	2,828
Gross amount carried at close of period [Abstract]
Land and improvements	3,449
Buildings and improvements	10,629
Total	14,078	[1]
Accumulated depreciation	(6,697)
Date of construction	1987
Date acquired	11/94
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Bellevue [Member] | Sammamish View [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Sammamish View
Units	153
Location	Bellevue, WA
Initial cost [Abstract]
Land	3,324
Buildings and improvements	7,501
Costs capitalized subsequent to acquisition	5,677
Gross amount carried at close of period [Abstract]
Land and improvements	3,331
Buildings and improvements	13,171
Total	16,502	[1]
Accumulated depreciation	(8,094)
Date of construction	1986
Date acquired	11/94
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Bellevue [Member] | Cedar Terrace [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Cedar Terrace
Units	180
Location	Bellevue, WA
Initial cost [Abstract]
Land	5,543
Buildings and improvements	16,442
Costs capitalized subsequent to acquisition	3,572
Gross amount carried at close of period [Abstract]
Land and improvements	5,652
Buildings and improvements	19,905
Total	25,557	[1]
Accumulated depreciation	(6,150)
Date of construction	1984
Date acquired	01/05
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Bellevue [Member] | Foothill Commons [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Foothill Commons
Units	388
Location	Bellevue, WA
Initial cost [Abstract]
Land	2,435
Buildings and improvements	9,821
Costs capitalized subsequent to acquisition	30,872
Gross amount carried at close of period [Abstract]
Land and improvements	2,440
Buildings and improvements	40,688
Total	43,128	[1]
Accumulated depreciation	(18,651)
Date of construction	1978
Date acquired	03/90
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Bellevue [Member] | Woodland Commons [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Woodland Commons
Units	236
Location	Bellevue, WA
Initial cost [Abstract]
Land	2,040
Buildings and improvements	8,727
Costs capitalized subsequent to acquisition	16,655
Gross amount carried at close of period [Abstract]
Land and improvements	2,044
Buildings and improvements	25,378
Total	27,422	[1]
Accumulated depreciation	(10,043)
Date of construction	1978
Date acquired	03/90
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Redmond [Member] | Delano/Bon Terra [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Delano/Bon Terra
Units	126
Location	Redmond, WA
Initial cost [Abstract]
Land	7,470
Buildings and improvements	22,511
Costs capitalized subsequent to acquisition	561
Gross amount carried at close of period [Abstract]
Land and improvements	7,470
Buildings and improvements	23,072
Total	30,542	[1]
Accumulated depreciation	(773)
Date of construction	2005/2011
Date acquired	12/11
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Kirkland [Member] | Evergreen Heights [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Evergreen Heights
Units	200
Location	Kirkland, WA
Initial cost [Abstract]
Land	3,566
Buildings and improvements	13,395
Costs capitalized subsequent to acquisition	3,346
Gross amount carried at close of period [Abstract]
Land and improvements	3,649
Buildings and improvements	16,658
Total	20,307	[1]
Accumulated depreciation	(8,384)
Date of construction	1990
Date acquired	06/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Kirkland [Member] | Bridle Trails [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Bridle Trails
Units	108
Location	Kirkland, WA
Initial cost [Abstract]
Land	1,500
Buildings and improvements	5,930
Costs capitalized subsequent to acquisition	5,304
Gross amount carried at close of period [Abstract]
Land and improvements	1,531
Buildings and improvements	11,203
Total	12,734	[1]
Accumulated depreciation	(5,243)
Date of construction	1986
Date acquired	10/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Kirkland [Member] | Corbella at Juanita Bay [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Corbella at Juanita Bay
Units	169
Location	Kirkland, WA
Initial cost [Abstract]
Land	5,801
Buildings and improvements	17,415
Costs capitalized subsequent to acquisition	852
Gross amount carried at close of period [Abstract]
Land and improvements	5,801
Buildings and improvements	18,267
Total	24,068	[1]
Accumulated depreciation	(1,373)
Date of construction	1978
Date acquired	11/10
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Unencumbered Apartment Communities [Member] | WA [Member] | Mill Creek [Member] | The Laurels at Mill Creek [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	The Laurels at Mill Creek
Units	164
Location	Mill Creek, WA
Initial cost [Abstract]
Land	1,559
Buildings and improvements	6,430
Costs capitalized subsequent to acquisition	4,945
Gross amount carried at close of period [Abstract]
Land and improvements	1,595
Buildings and improvements	11,339
Total	12,934	[1]
Accumulated depreciation	(5,607)
Date of construction	1981
Date acquired	12/96
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Office Buildings [Member] | CA [Member] | Los Angeles [Member] | Essex Hollywood [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Essex Hollywood
Units	35,000
Location	Los Angeles, CA
Initial cost [Abstract]
Land	10,200
Buildings and improvements	13,800
Costs capitalized subsequent to acquisition	2,177
Gross amount carried at close of period [Abstract]
Land and improvements	10,200
Buildings and improvements	15,977
Total	26,177	[1]
Accumulated depreciation	(4,243)
Date of construction	1938
Date acquired	07/06
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Office Buildings [Member] | CA [Member] | Santa Clara [Member] | Santa Clara Square retail [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	Santa Clara Square retail
Units	139,000
Location	Santa Clara, CA
Initial cost [Abstract]
Land	6,472
Buildings and improvements	11,704
Costs capitalized subsequent to acquisition	2,636
Gross amount carried at close of period [Abstract]
Land and improvements	6,472
Buildings and improvements	14,340
Total	20,812	[1]
Accumulated depreciation	(1,711)
Date of construction	1970
Date acquired	09/11
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Office Buildings [Member] | CA [Member] | Irvine [Member] | 17461 Derian [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	17461 Derian
Units	110,000
Location	Irvine, CA
Initial cost [Abstract]
Land	3,079
Buildings and improvements	12,315
Costs capitalized subsequent to acquisition	6,037
Gross amount carried at close of period [Abstract]
Land and improvements	3,105
Buildings and improvements	18,326
Total	21,431	[1]
Accumulated depreciation	(9,259)
Date of construction	1983
Date acquired	07/00
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Office Buildings [Member] | CA [Member] | Palo Alto [Member] | 925/935 East Meadow [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property	925/935 East Meadow
Units	31,900
Location	Palo Alto, CA
Initial cost [Abstract]
Land	1,401
Buildings and improvements	3,172
Costs capitalized subsequent to acquisition	7,985
Gross amount carried at close of period [Abstract]
Land and improvements	3,147
Buildings and improvements	9,411
Total	12,558	[1]
Accumulated depreciation	(3,866)
Date of construction	1988
Date acquired	11/97
Lives, minimum (in years)	3
Lives , maximum (in years)	30
Consolidated Development Pipeline [Member]
Initial cost [Abstract]
Land	31,957
Buildings and improvements	0
Costs capitalized subsequent to acquisition	34,894
Gross amount carried at close of period [Abstract]
Land and improvements	66,851
Buildings and improvements	0
Total	66,851	[1]
Accumulated depreciation	$ 0

[1] The aggregate cost for federal income tax purposes is approximately $4.0 billion (unaudited).

[2] The land is leased pursuant to a ground lease expiring 2082.

[3] The land is leased pursuant to a ground lease expiring 2070.

[4] A portion of land is leased pursuant to a ground lease expiring in 2028.

[5] The land is leased pursuant to a ground lease expiring 2067.

[6] The land is leased pursuant to a ground lease expiring 2027.

[7] The land is leased pursuant to a ground lease expiring in 2028.