Rental Income under Operating Leases (Notes)

12 Months Ended

Dec. 31, 2017

Leases, Operating [Abstract]

Operating Leases of Lessor Disclosure [Text Block]

Rental Income Under Operating Leases

The following is the minimum future rental income as of December 31, 2017 under non-cancelable operating leases, assuming the minimum contractual lease term (in thousands):

Years ending December 31,
2018	$	838,022
2019	675,678
2020	553,676
2021	437,027
2022	325,915
2023 and thereafter	488,061
Total	$	3,318,379