Reportable Segments (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

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

The following table presents a reconciliation of NOI from our rental real estate specific to continuing operations for the years ended December 31, 2017, 2016 and 2015, respectively (amounts in thousands):

	Year Ended December 31,
	2017			2016			2015
Rental income	$	2,470,689		$	2,422,233		$	2,736,578
Property and maintenance expense		(405,281	)		(406,823	)		(479,160	)
Real estate taxes and insurance expense		(335,495	)		(317,387	)		(339,802	)
Total operating expenses		(740,776	)		(724,210	)		(818,962	)
Net operating income	$	1,729,913		$	1,698,023		$	1,917,616

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 specific to continuing operations for the years ended December 31, 2017, 2016 and 2015, respectively, as well as total assets and capital expenditures at December 31, 2017 and 2016, respectively (amounts in thousands):

	Year Ended December 31, 2017						Year Ended December 31, 2016						Year Ended December 31, 2015
	Rental Income		Operating Expenses		NOI		Rental Income		Operating Expenses		NOI		Rental Income		Operating Expenses		NOI
Same store (1)
Los Angeles	$	396,375	$	111,854	$	284,521	$	382,425	$	111,055	$	271,370	$	349,285	$	104,614	$	244,671
Orange County		88,527		21,544		66,983		84,590		20,600		63,990		75,068		18,550		56,518
San Diego		88,507		23,073		65,434		84,646		22,366		62,280		83,491		22,938		60,553
Subtotal - Southern California		573,409		156,471		416,938		551,661		154,021		397,640		507,844		146,102		361,742
Washington D.C.		430,056		129,717		300,339		424,350		126,154		298,196		417,985		123,450		294,535
New York		457,100		165,173		291,927		456,664		159,302		297,362		450,460		152,682		297,778
San Francisco		378,939		91,777		287,162		371,633		90,393		281,240		343,089		84,603		258,486
Boston		228,724		63,148		165,576		225,014		62,650		162,364		232,462		67,252		165,210
Seattle		178,497		49,383		129,114		168,975		46,255		122,720		145,646		39,307		106,339
Other Markets		1,839		652		1,187		1,797		567		1,230		1,680		528		1,152
Total same store		2,248,564		656,321		1,592,243		2,200,094		639,342		1,560,752		2,099,166		613,924		1,485,242
Non-same store/other (2) (3)
Non-same store		207,974		72,723		135,251		117,143		41,877		75,266		72,123		27,078		45,045
Other (3)		14,151		11,732		2,419		104,996		42,991		62,005		565,289		177,960		387,329
Total non-same store/other		222,125		84,455		137,670		222,139		84,868		137,271		637,412		205,038		432,374
Totals	$	2,470,689	$	740,776	$	1,729,913	$	2,422,233	$	724,210	$	1,698,023	$	2,736,578	$	818,962	$	1,917,616

(1) For the years ended December 31, 2017 and 2016, same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2016, less properties subsequently sold, which represented 70,117 apartment units.  For the year ended December 31, 2015, same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2015, less properties subsequently sold, which represented 69,879 apartment units.    

(2) For the years ended December 31, 2017 and 2016, non-same store primarily includes properties acquired after January 1, 2016, plus any properties in lease-up and not stabilized as of January 1, 2016.  For the year ended December 31, 2015, non-same store primarily includes properties acquired after January 1, 2015, plus any properties in lease-up and not stabilized as of January 1, 2015.

(3) Other includes development, other corporate operations and operations prior to sale for properties sold from 2014 through 2017 that do not meet the discontinued operations criteria.

	Year Ended December 31, 2017				Year Ended December 31, 2016
	Total Assets		Capital Expenditures		Total Assets		Capital Expenditures
Same store (1)
Los Angeles	$	2,601,569	$	26,679	$	2,678,787	$	26,335
Orange County		328,593		9,237		336,195		6,876
San Diego		421,267		4,922		436,005		4,851
Subtotal - Southern California		3,351,429		40,838		3,450,987		38,062
Washington D.C.		3,803,185		35,423		3,916,264		33,867
New York		4,123,841		32,209		4,256,087		25,171
San Francisco		2,467,872		38,392		2,521,729		24,455
Boston		1,653,997		28,696		1,702,675		18,396
Seattle		1,165,031		21,479		1,191,591		14,019
Other Markets		12,768		103		12,902		67
Total same store		16,578,123		197,140		17,052,235		154,037
Non-same store/other (2) (3)
Non-same store		3,221,468		4,849		2,727,875		10,965
Other (3)		771,008		618		924,038		7,175
Total non-same store/other		3,992,476		5,467		3,651,913		18,140
Totals	$	20,570,599	$	202,607	$	20,704,148	$	172,177

(1) Same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2016, less properties subsequently sold, which represented 70,117 apartment units.

(2) Non-same store primarily includes properties acquired after January 1, 2016, plus any properties in lease-up and not stabilized as of January 1, 2016.

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