Stockholders' Equity - Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended							9 Months Ended	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Dec. 31, 2019
Equity [Abstract]
Distributions per Common Share (in dollars per share)	$ 0.175	$ 0.175	$ 0.175	$ 0.175	$ 0.175	$ 0.175	$ 0.175	$ 0.525	$ 0.700
Total Distributions	$ 6,164	$ 3,220	$ 3,223	$ 3,182	$ 3,224	$ 3,225	$ 3,141	$ 12,607	$ 12,772