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Future Rental Revenues
12 Months Ended
Dec. 31, 2017
Operating Leases, Future Minimum Payments Receivable [Abstract]  
Future Rental Revenues
Future Rental Revenues
Our properties are leased to tenants under net and semi-net operating leases. Future minimum rental receipts, excluding tenant reimbursements of expenses, under non-cancelable operating leases executed as of December 31, 2017 are approximately as follows: 
2018
$
287,809

2019
254,064

2020
216,135

2021
170,559

2022
132,118

Thereafter
356,402

Total
$
1,417,087