Other Assets, Net and Accounts Payable and Other Liabilities - Schedule of other assets and other liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Other Assets, Net:
Lease intangibles, net (Note 6)	$ 112,249	$ 127,571
Deferred charges, net	26,931	24,589
Prepaid expenses	17,884	16,838
Other receivables	4,764	11,356
Accrued interest receivable	15,352	11,668
Deposits	4,505	6,296
Due from seller	4,300	4,300
Deferred tax assets	1,139	2,096
Derivative financial instruments (Note 8)	15,115	4,402
Due from related parties	2,386	1,479
Corporate assets	2,063	2,369
Income taxes receivable	3,187	1,995
Other assets, net	209,875	214,959
Deferred Charges, Net:
Deferred leasing and other costs	43,399	41,020
Deferred financing costs related to line of credit	8,873	7,786
Deferred costs, gross	52,272	48,806
Accumulated amortization	(25,341)	(24,217)
Deferred charges, net	26,931	24,589
Accounts Payable and Other Liabilities:
Lease intangibles, net (Note 6)	97,777	104,478
Accounts payable and accrued expenses	63,435	61,420
Deferred income	28,539	31,306
Tenant security deposits, escrow and other	10,364	10,029
Derivative financial instruments (Note 8)	361	1,467
Income taxes payable	19	176
Other	2,398	1,176
Accounts payable and other liabilities	$ 202,893	$ 210,052