Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Approximate minimum annual rentals under operating lease obligations and sublease receivables

Minimum annual rental payments under operating leases are as follows (in thousands):

	Office Lease Obligations		Ground Lease Obligations		Total Operating Lease Obligations
2019	$	2,237	$	2,114	$	4,351
2020	2,821		2,350		5,171
2021	2,719		2,439		5,158
2022	2,582		2,492		5,074
2023	1,871		2,492		4,363
Thereafter	10,644		422,169		432,813
Total	$	22,874	$	434,056	$	456,930