Third Party Lease Commitments (Tables)

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Future Minimum Rental Income to be Received

As of December 31, 2017, approximate future minimum rental income to be received under non-cancelable operating leases, in excess of one-year, is as follows:

Year ending December 31,	Operating lease income
	(in thousands)
2018	$	4,397
2019		4,109
2020		3,706
2021		3,332
2022		2,197
Thereafter		2,296
	$	20,037

Operating Ground Lease Commitments

options at fair market value at the conclusion of the initial lease terms. The leases extend for varying periods through 2096.

Year ending December 31,	Operating ground lease commitments
	(in thousands)
2018	$	5,276
2019		4,854
2020		4,635
2021		4,675
2022		4,056
Thereafter		100,314
	$	123,810