Other Assets, Net and Accounts Payable and Other Liabilities - Schedule of other assets and other liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Assets, Net:
Lease intangibles, net (Note 6)	$ 95,518	$ 100,732
Deferred charges, net	31,374	30,488
Accrued interest receivable	19,208	13,917
Prepaid expenses	17,919	17,468
Due from seller	3,364	3,682
Income taxes receivable	2,142	2,433
Other receivables	1,753	2,058
Deposits	1,725	1,728
Corporate assets, net	1,745	1,302
Derivative financial instruments (Note 8)	2	1
Other assets, net	174,750	173,809
Deferred Charges, Net:
Deferred leasing and other costs	60,794	57,533
Deferred financing costs related to line of credit	9,877	11,341
Deferred costs, gross	70,671	68,874
Accumulated amortization	(39,297)	(38,386)
Deferred charges, net	31,374	30,488
Accounts Payable and Other Liabilities:
Lease intangibles, net (Note 6)	$ 78,012	$ 76,434
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Accounts payable and other liabilities	Accounts payable and other liabilities
Accounts payable and accrued expenses	$ 60,440	$ 53,031
Derivative financial instruments (Note 8)	54,827	90,139
Deferred income	33,498	31,842
Tenant security deposits, escrow and other	12,407	12,178
Lease liability - finance leases, net (Note 11)	6,513	6,287
Accounts payable and other liabilities	$ 245,697	$ 269,911