Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Future minimum rental payments under the terms of all non-cancelable operating ground leases under which the Company is the lessee, as of December 31, 2017, were as follows (in thousands):



Year	Amount
2018	$	1,771
2019	1,766
2020	1,766
2021	1,766
2022	1,720
2023 though 2067	33,160
Total	$	41,949