Rent Expense (Tables)

6 Months Ended

Jun. 30, 2018

Leases [Abstract]

Schedule of future minimum lease obligations under non-cancelable ground leases

As of June 30, 2018, the future minimum lease obligations under non-cancelable parking, air, ground, and office leases, exclusive of the 17 assets classified as held for sale, were as follows (in thousands):

2018	$	1,383
2019	2,724
2020	2,673
2021	2,692
2022	2,717
Thereafter	123,289
Total	$	135,478