Consolidated Balance Sheets - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Document Fiscal Year Focus	2017
Real estate investments at cost (notes 1, 2 and 3):
Investments in real estate partnerships (note 4)	$ 386,304	$ 296,699
Acquired lease intangible assets, less accumulated amortization of $148,280 and $56,695 at December 31, 2017 and 2016, respectively (note 5)	478,826	118,831
Liabilities:
Notes payable (note 7)	2,971,715	1,363,925
Unsecured Debt	623,262	278,495
Parent Company [Member]
Real estate investments at cost (notes 1, 2 and 3):
Land	4,667,744	1,660,424
Buildings and improvements	5,910,686	3,092,197
Properties in development	314,391	180,878
Gross real estate investments at cost	10,892,821	4,933,499
Less: accumulated depreciation	1,339,771	1,124,391
Total Cost Net of Accumulated Depreciation	9,553,050	3,809,108
Investments in real estate partnerships (note 4)	386,304	296,699
Net real estate investments	9,939,354	4,105,807
Cash and cash equivalents	45,370	13,256
Restricted cash	4,011	4,623
Accounts and Notes Receivable, Net	170,985	111,722
Deferred Costs	80,044	69,000
Acquired lease intangible assets, less accumulated amortization of $148,280 and $56,695 at December 31, 2017 and 2016, respectively (note 5)	478,826	118,831
Other assets (note 1)	427,127	65,667
Total assets	11,145,717	4,488,906
Liabilities:
Notes payable (note 7)	2,971,715	1,363,925
Unsecured Debt	623,262	278,495
Accounts payable and other liabilities	234,272	138,936
Acquired lease intangible liabilities, less accumulated amortization of $56,550 and $23,538 at December 31, 2017 and 2016, respectively (note 5)	537,401	54,180
Tenants’ security and escrow deposits and prepaid rent	46,013	28,868
Total liabilities	4,412,663	1,864,404
Commitments and contingencies (notes 14 and 15)	0	0
Stockholders’ equity (note 10):
Preferred stock, $0.01 par value per share, 30,000,000 shares authorized; 13,000,000 Series 6 and 7 shares issued and outstanding at December 31, 2013 and December 31, 2012, with liquidation preferences of $25 per share	0	325,000
Common stock $0.01 par value per share, 220,000,000 and 150,000,000 shares authorized; 171,364,908 and 104,497,286 shares issued at December 31, 2017 and 2016, respectively	1,714	1,045
Treasury Stock, Value	18,307	17,062
Additional paid-in capital	7,873,104	3,294,923
Accumulated other comprehensive loss	(6,289)	(18,346)
Distributions in excess of net income	(1,158,170)	(994,259)
Total stockholders’ equity	6,692,052	2,591,301
Noncontrolling interests (note 10):
Noncontrolling Interest in Operating Partnerships	10,907	(1,967)
Limited partners’ interests in consolidated partnerships	30,095	35,168
Total noncontrolling interests	41,002	33,201
Total equity	6,733,054	2,624,502
Total liabilities and equity	11,145,717	4,488,906
Partnership Interest [Member]
Real estate investments at cost (notes 1, 2 and 3):
Land	4,667,744	1,660,424
Buildings and improvements	5,910,686	3,092,197
Properties in development	314,391	180,878
Gross real estate investments at cost	10,892,821	4,933,499
Less: accumulated depreciation	1,339,771	1,124,391
Total Cost Net of Accumulated Depreciation	9,553,050	3,809,108
Investments in real estate partnerships (note 4)	386,304	296,699
Net real estate investments	9,939,354	4,105,807
Cash and cash equivalents	45,370	13,256
Restricted cash	4,011	4,623
Accounts and Notes Receivable, Net	170,985	111,722
Deferred Costs	80,044	69,000
Acquired lease intangible assets, less accumulated amortization of $148,280 and $56,695 at December 31, 2017 and 2016, respectively (note 5)	478,826	118,831
Other assets (note 1)	427,127	65,667
Total assets	11,145,717	4,488,906
Liabilities:
Notes payable (note 7)	2,971,715	1,363,925
Unsecured Debt	623,262	278,495
Accounts payable and other liabilities	234,272	138,936
Acquired lease intangible liabilities, less accumulated amortization of $56,550 and $23,538 at December 31, 2017 and 2016, respectively (note 5)	537,401	54,180
Tenants’ security and escrow deposits and prepaid rent	46,013	28,868
Total liabilities	4,412,663	1,864,404
Commitments and contingencies (notes 14 and 15)	0	0
Stockholders’ equity (note 10):
Preferred Units General Partner	0	325,000
General partner; 171,364,908 and 104,497,286 units outstanding at December 31, 2017 and 2016, respectively	6,698,341	2,284,647
Limited Partners' Capital Account	10,907	(1,967)
Accumulated other comprehensive loss	(6,289)	(18,346)
Total partners’ capital	6,702,959	2,589,334
Noncontrolling interests (note 10):
Limited partners’ interests in consolidated partnerships	30,095	35,168
Total noncontrolling interests	30,095	35,168
Total equity	6,733,054	2,624,502
Total liabilities and equity	$ 11,145,717	$ 4,488,906