Leases (Additional Information) (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) property	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jan. 01, 2019
Leases [Abstract]
Number of properties subject to operating lease | property	5
Operating lease, weighted average remaining term	72 years
Number of properties subject to finance lease | property	2
Finance lease, weighted average remaining term	4 years
Operating ground leases, right-of-use asset	$ 57,300,000
Finance ground leases, right-of-use asset	11,900,000
Operating ground leases, liability	59,379,000
Finance ground leases, liability	$ 9,730,000
Weighted average discount rate	4.50%			4.49%
Operating lease expense	$ 3,900,000
Operating lease expense		$ 3,500,000	$ 3,200,000
Variable lease expense	0
Interest expense related to finance lease	462,000
Operating lease payments	2,600,000
Finance lease payments	$ 462,000