Future Minimum Rents (Tables)

12 Months Ended

Dec. 31, 2018

Future Minimum Rents [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

The future contractual minimum lease payments to be received (excluding operating expense reimbursements) by the Company as of December 31, 2018, under non-cancelable operating leases which expire on various dates through 2049, are as follows: 

Years Ending December 31,	(in thousands)
2019	$	2,088,171
2020	2,106,963
2021	2,015,031
2022	1,838,699
2023	1,736,636
Thereafter	12,295,464