Supplemental Detail for Certain Components of Consolidated Balance Sheets - Accounts Payable, Acquired Lease Intangibles, and Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts payable and accrued expenses
Notes payable - interest payable	$ 73,094	$ 64,058
Property taxes payable	14,511	11,718
Mortgages, term loans, credit line - interest payable and interest rate swaps	8,597	2,360
Accrued costs on properties under development	8,137	2,681
Other items	29,426	28,706
Total accounts payable and accrued expenses	133,765	109,523
Lease intangible liabilities, net
Below-market leases	404,938	340,906
Accumulated amortization of below-market leases	(94,072)	(72,110)
Total lease intangible liabilities, net	310,866	268,796
Other liabilities
Rent received in advance and other deferred revenue	115,380	105,284
Security deposits	6,093	6,259
Capital lease obligations	5,636	5,326
Total other liabilities	$ 127,109	$ 116,869