Leases - Additional Information (Details)	3 Months Ended
	Mar. 31, 2019 Property
Leases [Abstract]
Number of consolidated properties under ground leases	13
Leases ending expiration date	2076
Date majority of leases expire	2027
Weighted average remaining operating lease term	15 years 9 months 18 days
Weighted average discount rate used to determine operating lease liability	5.70%