Supplemental Detail for Certain Components of Consolidated Balance Sheets - Accounts Payable, Acquired Lease Intangibles, and Other Liabilities (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) item	Jan. 31, 2017 USD ($)	Aug. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Accounts payable and accrued expenses
Property taxes payable	$ 21,162			$ 13,354
Accrued costs on properties under development	11,428			9,976
Other items	22,190			24,197
Total accounts payable and accrued expenses	97,541			115,826
Acquired lease intangible liabilities, net
Acquired below-market leases	315,301			288,412
Accumulated amortization of acquired below-market leases	(50,256)			(37,496)
Total acquired lease intangible liabilities	265,045			250,916
Other liabilities
Rent received in advance and other deferred revenue	86,479			42,840
Security deposits	6,487			6,418
Capital lease obligations	4,939			4,707
Total other liabilities	97,905			53,965
Additional rent	$ 75,000
Number of installments | item	2
Deferred revenue relating to lease modification			$ 37,500
Remaining lease term	15 years
Forecast
Other liabilities
Additional rent receivable		$ 37,500
Note payable
Accounts payable and accrued expenses
Interest payable	$ 30,145			61,486
Mortgages, term loans, credit line, interest payable, and interest rate swaps
Accounts payable and accrued expenses
Interest payable	$ 12,616			$ 6,813