Customer Leases, as Lessor (Tables)

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Future Minimum Lease Payments to be Received Under Non-Cancelable Operating Customer Leases

Future minimum lease payments to be received under non-cancelable operating customer leases (inclusive of payments for contracts which have not yet commenced and exclusive of recoveries of operating costs from customers) are as follows for the years ending December 31 (in thousands):

Year Ending December 31,
2018	$	334,594
2019		239,485
2020		172,280
2021		130,969
2022		84,660
Thereafter		82,873
Total	$	1,044,861