Real Estate Intangibles - Summary of Real Estate Intangible Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Rental income related to (above)/below market tenant leases, net	$ 291	$ (294)	$ 210	$ (978)
Amortization related to in place lease intangibles and lease commissions	$ (48,414)	$ (31,455)	$ (101,837)	$ (97,479)