Rent Expense - Additional Information (Details)	3 Months Ended
	Mar. 31, 2020 properties
Leases [Abstract]
Number of properties subject to parking lease	3
Number of properties subject to air space lease	1
Number of properties subject to ground leases	81
Number of office space leases	11
Maximum lease terms	87 years
Operating lease, weighted average remaining lease term	44 years
Operating lease, weighted average discount rate, percent	4.40%