Ground Lease - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Lessee Disclosure [Abstract]
Fixed rent payments due per year on ground lease	$ 733		$ 733
Ground lease right-of-use asset	7,475		7,475		$ 7,479
Ground lease liability	10,877		10,877		$ 10,882
Ground rent expense	$ 183	$ 183	$ 365	$ 363