Reportable Segments (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Schedule of Reconciliation of NOI from Rental Real Estate Specific to Continuing Operations

ThefollowingtablepresentsareconciliationofNOIfromourrentalrealestateforthe six months and quarters ended June 30, 2018 and 2017, respectively (amounts inthousands):

	Six Months Ended June 30,						Quarter Ended June 30,
	2018			2017			2018			2017
Rental income	$	1,272,451		$	1,216,219		$	639,620		$	612,299
Property and maintenance expense		(211,946	)		(201,924	)		(103,744	)		(99,316	)
Real estate taxes and insurance expense		(181,396	)		(169,231	)		(89,482	)		(87,503	)
Total operating expenses		(393,342	)		(371,155	)		(193,226	)		(186,819	)
Net operating income	$	879,109		$	845,064		$	446,394		$	425,480

Schedule of NOI for Each Segment from Rental Real Estate Specific to Continuing Operations

The following tables present NOI for each segment from our rental real estate for the six months and quarters ended June 30, 2018 and 2017,respectively,aswellastotalassetsandcapitalexpendituresatJune 30, 2018(amounts inthousands):

	Six Months Ended June 30, 2018							Six Months Ended June 30, 2017
	Rental Income		Operating Expenses		NOI			Rental Income		Operating Expenses		NOI
Same store (1)
Los Angeles	$	205,103	$	58,892	$	146,211		$	198,557	$	56,960	$	141,597
Orange County		45,331		11,090		34,241			43,654		10,838		32,816
San Diego		45,425		11,751		33,674			43,620		11,535		32,085
Subtotal - Southern California		295,859		81,733		214,126			285,831		79,333		206,498
San Francisco		219,400		52,854		166,546			213,516		54,018		159,498
Washington D.C.		215,843		66,899		148,944			213,546		64,572		148,974
New York		240,124		94,505		145,619			239,367		88,938		150,429
Boston		113,511		31,593		81,918			110,989		30,145		80,844
Seattle		97,642		27,799		69,843			94,020		26,407		67,613
Other Markets		969		341		628			924		340		584
Total same store		1,183,348		355,724		827,624			1,158,193		343,753		814,440
Non-same store/other (2) (3)
Non-same store		83,193		29,862		53,331			34,439		12,533		21,906
Other (3)		5,910		7,756		(1,846	)		23,587		14,869		8,718
Total non-same store/other		89,103		37,618		51,485			58,026		27,402		30,624
Totals	$	1,272,451	$	393,342	$	879,109		$	1,216,219	$	371,155	$	845,064

(1) For the six months ended June 30, 2018 and 2017, same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2017, less properties subsequently sold, which represented 72,210 apartmentunits.

(2) For the six months ended June 30, 2018 and 2017, non-same store primarily includes properties acquired after January 1, 2017, plus any properties in lease-up and not stabilized as of January 1,2017.

(3) Other includes development, other corporate operations and operations prior to disposition for properties sold.

	Quarter Ended June 30, 2018							Quarter Ended June 30, 2017
	Rental Income		Operating Expenses		NOI			Rental Income		Operating Expenses		NOI
Same store (1)
Los Angeles	$	102,619	$	29,032	$	73,587		$	99,921	$	28,309	$	71,612
Orange County		22,829		5,564		17,265			21,998		5,376		16,622
San Diego		22,932		5,788		17,144			21,897		5,736		16,161
Subtotal - Southern California		148,380		40,384		107,996			143,816		39,421		104,395
San Francisco		115,332		27,581		87,751			111,835		28,466		83,369
Washington D.C.		108,689		33,237		75,452			107,103		32,241		74,862
New York		120,498		46,680		73,818			120,005		43,499		76,506
Boston		57,217		15,511		41,706			55,943		14,941		41,002
Seattle		49,031		14,111		34,920			47,594		13,392		34,202
Other Markets		481		175		306			461		144		317
Total same store		599,628		177,679		421,949			586,757		172,104		414,653
Non-same store/other (2) (3)
Non-same store		39,427		13,154		26,273			13,850		5,193		8,657
Other (3)		565		2,393		(1,828	)		11,692		9,522		2,170
Total non-same store/other		39,992		15,547		24,445			25,542		14,715		10,827
Totals	$	639,620	$	193,226	$	446,394		$	612,299	$	186,819	$	425,480

(1) For the quarters ended June 30, 2018 and 2017, same store primarily includes all properties acquired or completed that were stabilized prior to April 1, 2017, less properties subsequently sold, which represented 72,629 apartmentunits.

(2) For the quarters ended June 30, 2018 and 2017, non-same store primarily includes properties acquired after April 1, 2017, plus any properties in lease-up and not stabilized as of April 1,2017.

(3) Other includes development, other corporate operations and operations prior to disposition for properties sold.

	Six Months Ended June 30, 2018
	Total Assets		Capital Expenditures
Same store (1)
Los Angeles	$	2,649,731	$	13,220
Orange County		323,604		4,017
San Diego		413,701		2,481
Subtotal - Southern California		3,387,036		19,718
San Francisco		3,004,183		21,259
Washington D.C.		3,742,083		14,137
New York		4,404,182		12,092
Boston		1,609,747		9,451
Seattle		1,296,447		6,900
Other Markets		12,795		102
Total same store		17,456,473		83,659
Non-same store/other (2) (3)
Non-same store		2,414,779		2,210
Other (3)		535,330		118
Total non-same store/other		2,950,109		2,328
Totals	$	20,406,582	$	85,987

(1) Same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2017, less properties subsequently sold, which represented 72,210 apartmentunits.

(2) Non-same store primarily includes properties acquired after January 1, 2017, plus any properties in lease-up and not stabilized as of January 1,2017.

(3) Other includes development, other corporate operations and capital expenditures for propertiessold.