Consolidated Statements Of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues:
Rentals, net	$ 537,265	$ 502,464	$ 503,128
Other	12,290	10,380	11,278
Total	549,555	512,844	514,406
Expenses:
Depreciation and amortization	162,535	145,940	150,356
Operating	98,855	94,244	95,318
Real estate taxes, net	66,358	60,289	60,768
Impairment loss	98	153	1,024
General and administrative	27,266	27,524	24,902
Total	355,112	328,150	332,368
Operating Income	194,443	184,694	182,038
Interest Expense, net	(83,003)	(87,783)	(94,725)
Interest and Other Income	2,569	4,563	3,756
Gain on Sale and Acquisition of Real Estate Joint Venture and Partnership Interests	48,322	879	1,718
(Provision) Benefit for Income Taxes	(6,856)	(52)	1,261
Equity in Earnings of Real Estate Joint Ventures and Partnerships, net	20,642	19,300	22,317
Income from Continuing Operations	176,117	121,601	116,365
Operating Income from Discontinued Operations	0	0	342
Gain on Sale of Property from Discontinued Operations	0	0	44,582
Income from Discontinued Operations	0	0	44,924
Gain on Sale of Property	100,714	59,621	146,290
Net Income	276,831	181,222	307,579
Less: Net Income Attributable to Noncontrolling Interests	(37,898)	(6,870)	(19,571)
Net Income Adjusted for Noncontrolling Interests	238,933	174,352	288,008
Dividends on Preferred Shares	0	(3,830)	(10,840)
Redemption Costs of Preferred Shares	0	(9,687)	0
Net Income Attributable to Common Shareholders	$ 238,933	$ 160,835	$ 277,168
Earnings Per Common Share - Basic:
Income from continuing operations attributable to common shareholders (in dollars per share)	$ 1.90	$ 1.31	$ 1.91
Income from discontinued operations (in dollars per share)	0.00	0.00	0.37
Net income attributable to common shareholders (in dollars per share)	1.90	1.31	2.28
Earnings Per Common Share - Diluted:
Income from continuing operations attributable to common shareholders (in dollars per share)	1.87	1.29	1.89
Income from discontinued operations (in dollars per share)	0.00	0.00	0.36
Net income attributable to common shareholders (in dollars per share)	$ 1.87	$ 1.29	$ 2.25