Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Document Fiscal Year Focus	2018
Other expense (income):
Provision for impairment	$ (374)	$ 0
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	96	415
Net income (loss)	53,465	(20,715)
Parent Company [Member]
Revenues:
Minimum rent	201,392	141,240
Percentage rent	3,873	2,906
Recoveries from tenants and other income	64,270	45,279
Management Fees Revenue	7,158	6,706
Total revenues	276,693	196,131
Operating expenses:
Depreciation and amortization	88,525	60,053
Operating and maintenance	42,516	29,763
General and administrative	17,606	17,673
Real estate taxes	30,425	21,450
Other operating expenses (note 2)	1,632	71,512
Total operating expenses	180,704	200,451
Other expense (income):
Interest expense, net	36,785	27,199
Provision for impairment	16,054	0
Gain (Loss) on Extinguishment of Debt	(162)	0
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	32	1,097
Nonoperating Income (Expense)	52,969	26,102
Income (loss) from operations before equity in income of investments in real estate partnerships	43,020	(30,422)
Equity in income of investments in real estate partnerships	10,349	9,342
Income tax (benefit) of taxable REIT subsidiary	0	50
Income (loss) from operations	53,369	(21,130)
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	96	415
Net income (loss)	53,465	(20,715)
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable	111	(19)
Noncontrolling interests:
Limited partners’ interests in consolidated partnerships	(694)	(671)
Income attributable to noncontrolling interests	(805)	(652)
Net income (loss) attributable to the Company	52,660	(21,367)
Preferred stock dividends and issuance costs	0	(11,856)
Net Income (Loss) Available to Common Stockholders, Basic	$ 52,660	$ (33,223)
Income per common share/unit - basic:
Continuing operations (in dollars per share)	$ 0.31	$ (0.26)
Income per common share/unit - diluted:
Continuing operations (in dollars per share)	$ 0.31	$ (0.26)
Partnership Interest [Member]
Revenues:
Minimum rent	$ 201,392	$ 141,240
Percentage rent	3,873	2,906
Recoveries from tenants and other income	64,270	45,279
Management Fees Revenue	7,158	6,706
Total revenues	276,693	196,131
Operating expenses:
Depreciation and amortization	88,525	60,053
Operating and maintenance	42,516	29,763
General and administrative	17,606	17,673
Real estate taxes	30,425	21,450
Other operating expenses (note 2)	1,632	71,512
Total operating expenses	180,704	200,451
Other expense (income):
Provision for impairment	16,054	0
Gain (Loss) on Extinguishment of Debt	(162)	0
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	32	1,097
Nonoperating Income (Expense)	52,969	26,102
Income (loss) from operations before equity in income of investments in real estate partnerships	43,020	(30,422)
Equity in income of investments in real estate partnerships	10,349	9,342
Income tax (benefit) of taxable REIT subsidiary	0	50
Income (loss) from operations	53,369	(21,130)
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	96	415
Net income (loss)	53,465	(20,715)
Noncontrolling interests:
Limited partners’ interests in consolidated partnerships	(694)	(671)
Income attributable to noncontrolling interests	(694)	(671)
Net income (loss) attributable to the Company	52,771	(21,386)
Distributions Paid To Preferred Unit Holders	0	11,856
Net income (loss) attributable to common unit holders	$ 52,771	$ (33,242)
Income per common share/unit - basic:
Continuing operations (in dollars per share)	$ 0.31	$ (0.26)
Income per common share/unit - diluted:
Continuing operations (in dollars per share)	$ 0.31	$ (0.26)