Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	$ 131	$ 9,580	$ 4,913	$ 22,997
Document Fiscal Year Focus			2017
Other expense (income):
Provision for impairment	0	0	$ 0	1,666
Discontinued operations, net:
Net income			93,039	105,334
Parent Company [Member]
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	131	9,580	4,913	22,997
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable	132	16	217	165
Revenues:
Minimum rent	195,393	111,886	532,625	329,506
Percentage rent	1,147	495	5,509	2,651
Recoveries from tenants and other income	59,554	34,532	162,089	103,894
Management Fees Revenue	6,047	5,855	19,353	18,759
Total revenues	262,141	152,768	719,576	454,810
Operating expenses:
Depreciation and amortization	91,474	40,705	243,757	119,721
Operating and maintenance	38,020	23,373	103,888	69,767
General and administrative	15,199	16,046	49,618	48,695
Real estate taxes	29,315	17,058	79,636	49,697
Other operating expenses (note 2)	3,195	1,046	81,621	5,795
Total operating expenses	177,203	98,228	558,520	293,675
Other expense (income):
Interest expense, net	34,679	21,945	97,285	70,489
Provision for impairment	0	0	0	1,666
Gain (Loss) on Extinguishment of Debt	0	(13,943)	(12,404)	(13,943)
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	971	821	2,955	1,268
Gain (Loss) on Derivative Instruments, Net, Pretax	0	(40,586)	0	(40,586)
Nonoperating Income (Expense)	33,708	75,653	106,734	125,416
Income from operations before equity in income of investments in real estate partnerships	51,230	(21,113)	54,322	35,719
Equity in income of investments in real estate partnerships	12,221	22,647	33,804	46,618
Income from operations	63,451	1,534	88,126	82,337
Discontinued operations, net:
Net income	63,582	11,114	93,039	105,334
Noncontrolling interests:
Limited partners’ interests in consolidated partnerships	(637)	(527)	(1,884)	(1,380)
Income attributable to noncontrolling interests	(769)	(543)	(2,101)	(1,545)
Net income attributable to the Company	62,813	10,571	90,938	103,789
Preferred stock dividends and issuance costs	(3,147)	(5,266)	(16,128)	(15,797)
Net Income (Loss) Available to Common Stockholders, Basic	$ 59,666	$ 5,305	$ 74,810	$ 87,992
Income per common share/unit - basic:
Continuing operations (in dollars per share)	$ 0.35	$ 0.05	$ 0.48	$ 0.88
Income per common share/unit - diluted:
Continuing operations (in dollars per share)	$ 0.35	$ 0.05	$ 0.48	$ 0.88
Partnership Interest [Member]
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	$ 131	$ 9,580	$ 4,913	$ 22,997
Revenues:
Minimum rent	195,393	111,886	532,625	329,506
Percentage rent	1,147	495	5,509	2,651
Recoveries from tenants and other income	59,554	34,532	162,089	103,894
Management Fees Revenue	6,047	5,855	19,353	18,759
Total revenues	262,141	152,768	719,576	454,810
Operating expenses:
Depreciation and amortization	91,474	40,705	243,757	119,721
Operating and maintenance	38,020	23,373	103,888	69,767
General and administrative	15,199	16,046	49,618	48,695
Real estate taxes	29,315	17,058	79,636	49,697
Other operating expenses (note 2)	3,195	1,046	81,621	5,795
Total operating expenses	177,203	98,228	558,520	293,675
Other expense (income):
Interest expense, net	34,679	21,945	97,285	70,489
Provision for impairment	0	0	0	1,666
Gain (Loss) on Extinguishment of Debt	0	(13,943)	(12,404)	(13,943)
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	971	821	2,955	1,268
Gain (Loss) on Derivative Instruments, Net, Pretax	0	(40,586)	0	(40,586)
Nonoperating Income (Expense)	33,708	75,653	106,734	125,416
Income from operations before equity in income of investments in real estate partnerships	51,230	(21,113)	54,322	35,719
Equity in income of investments in real estate partnerships	12,221	22,647	33,804	46,618
Income from operations	63,451	1,534	88,126	82,337
Discontinued operations, net:
Net income	63,582	11,114	93,039	105,334
Noncontrolling interests:
Limited partners’ interests in consolidated partnerships	(637)	(527)	(1,884)	(1,380)
Income attributable to noncontrolling interests	(637)	(527)	(1,884)	(1,380)
Net income attributable to the Company	62,945	10,587	91,155	103,954
Distributions Paid To Preferred Unit Holders	3,147	5,266	16,128	15,797
Net income attributable to common unit holders	$ 59,798	$ 5,321	$ 75,027	$ 88,157
Income per common share/unit - basic:
Continuing operations (in dollars per share)	$ 0.35	$ 0.05	$ 0.48	$ 0.88
Income per common share/unit - diluted:
Continuing operations (in dollars per share)	$ 0.35	$ 0.05	$ 0.48	$ 0.88