Consolidated Statements Of Income And Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Property revenues
Rental revenues		$ 769,108		$ 731,874		$ 683,362
Other property revenues		123,820		112,104		105,489
Total property revenues		892,928	[1]	843,978	[1]	788,851
Property expenses
Property operating and maintenance		219,831		211,253		199,650
Real estate taxes		101,885		94,055		86,041
Total property expenses		321,716		305,308		285,691
Non-property income
Fee and asset management		6,999		9,832		11,690
Interest and other income		597		842		1,217
Income (loss) on deferred compensation plans		(264)		3,937		8,290
Total non-property income		7,332		14,611		21,197
Other expenses
Property management		23,761		22,689		21,774
Fee and asset management		4,742		5,341		5,756
General and administrative		46,233		51,005		40,586
Interest		97,312		94,906		99,784
Depreciation and amortization		257,082		237,346		216,288
Expense (benefit) on deferred compensation plans		(264)		3,937		8,290
Total other expenses		428,866		415,224		392,478
Gain on sale of operating properties, including land		104,288		159,289		698
Impairment associated with land holdings		0		(1,152)		0
Equity in income of joint ventures	[2]	6,168		7,023		24,865
Income from continuing operations before income taxes		260,134		303,217		157,442
Income tax expense		(1,872)		(1,903)		(1,826)
Income from continuing operations		258,262		301,314		155,616
Income from discontinued operations		0		0		8,515
Gain on sale of discontinued operations, net of tax		0		0		182,160
Net income		258,262		301,314		346,291
Less income allocated to non-controlling interests from continuing operations		(8,947)		(9,225)		(4,022)
Less income, including gain on sale, allocated to non-controlling interests from discontinued operations		0		0		(5,905)
Net income attributable to common shareholders		$ 249,315	[1]	$ 292,089	[1]	$ 336,364
Earnings per share - basic
Earnings per common share from continuing operations		$ 2.77		$ 3.29		$ 1.70
Earnings per common share from discontinued operations		0.00		0.00		2.12
Total earnings per common share - basic		2.77	[1]	3.29	[1]	3.82
Earnings per share - diluted
Earnings per common share from continuing operations		2.76		3.27		1.69
Earnings per common share from discontinued operations		0.00		0.00		2.09
Total earnings per common share - diluted		$ 2.76	[1]	$ 3.27	[1]	$ 3.78
Weighted average number of common shares outstanding - basic		89,120		88,084		87,204
Weighted average number of common shares outstanding - diluted		89,490		88,468		88,494
Net income attributable to common shareholders
Income from continuing operations		$ 258,262		$ 301,314		$ 155,616
Less income allocated to non-controlling interests from continuing operations		(8,947)		(9,225)		(4,022)
Income from continuing operations attributable to common shareholders		249,315		292,089		151,594
Income from discontinued operations, including gain on sale		0		0		190,675
Less income, including gain on sale, allocated to non-controlling interests from discontinued operations		0		0		(5,905)
Income from discontinued operations, including gain on sale, attributable to common shareholders		0		0		184,770
Net income attributable to common shareholders		249,315	[1]	292,089	[1]	336,364
Consolidated Statements of Comprehensive Income:
Net income		258,262		301,314		346,291
Other comprehensive income
Unrealized loss on cash flow hedging activities		0		(417)		0
Unrealized gain (loss) and unamortized prior service cost on postretirement obligation		357		(970)		(99)
Reclassification of net loss on cash flow hedging activities, prior service cost and net loss on post retirement obligation		149		74		54
Comprehensive income		258,768		300,001		346,246
Less income allocated to non-controlling interests from continuing operations		(8,947)		(9,225)		(4,022)
Less income, including gain on sale, allocated to non-controlling interests from discontinued operations		0		0		(5,905)
Comprehensive income attributable to common shareholders		$ 249,821		$ 290,776		$ 336,319

[1] Net income per share is computed independently for each of the quarters presented. Therefore, the sum of quarterly net income per share amounts may not equal the total computed for the year.

[2] Equity in income excludes our ownership interest of fee income from various services provided by us to the funds.