Supplemental Disclosures of Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Mar. 28, 2019	Dec. 31, 2018	Apr. 30, 2018	Mar. 30, 2018	Dec. 31, 2017	Jun. 27, 2013
Supplemental Disclosures of Cash Flow Information
Cash paid for interest	$ 134,900	$ 111,900
Cash paid for income taxes	3,100	2,900
Non-cash activities
Lease liabilities recorded under operating leases	132,000
Right-of-use assets recorded under operating leases	132,000
Acquisition of property using funds held in non-refundable escrow account		7,500
Reconciliation of cash and cash equivalents
Cash and cash equivalents shown in the consolidated balance sheets	27,136	30,717		$ 10,387
Restricted escrow deposits	1,323	7,054
Impounds related to mortgages payable	11,433	7,029		9,555
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	39,892	44,800		$ 21,071			$ 12,142
Properties under development
Supplemental Disclosures of Cash Flow Information
Interest capitalized to properties under development	$ 353	$ 130
Realty Income, L.P.
Non-cash activities
Number of partnership units issued	89,322	373,797	89,322		131,790	242,007		534,546
Shares issued in conjunction with acquisition	$ 6,300
Value of partnership units issued		$ 18,800