Schedule of Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Assets [Abstract]
Goodwill, net	$ 174,794	$ 307,434	$ 314,143
Investments	51,995	50,354
Prepaid and other	24,019	18,169
Derivative assets		2,987
Furniture, fixtures, and equipment, net	6,385	7,098
Deferred financing costs, net	3,065	4,687
Total other assets	$ 260,258	$ 390,729