Leases - Narrative (Details) $ in Thousands	Mar. 31, 2020 USD ($) property	Dec. 31, 2019 USD ($)
Operating Leases [Line Items]
Right-of-use assets	$ 29,256	$ 29,307
Lease liabilities	$ 29,256	$ 29,307
Number of properties subject to ground leases | property	3
Weighted average discount rate	4.50%
Weighted average remaining lease term (in years)	50 years 1 month 6 days
Minimum
Operating Leases [Line Items]
Term of lease	1 year
Maximum
Operating Leases [Line Items]
Term of lease	21 years