Summary of Significant Accounting Policies - Narratives (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 vie segment	Jan. 01, 2019 USD ($)	Dec. 31, 2018 vie
Summary of Significant Accounting Policies
Variable interest entities, count | vie	2		4
Variable interest entities consolidated, count | vie	1		3
Number of segments | segment	1
ASU 2016-02
Depreciation and Amortization
Right-of-use asset | $		$ 1.5
Lease liability | $		$ 2.3
RSU
Depreciation and Amortization
Vesting period	3 years
Building | Maximum
Depreciation and Amortization
Fixed assets useful life	40 years
Building Improvements | Minimum
Depreciation and Amortization
Fixed assets useful life	4 years
Site Improvements | Minimum
Depreciation and Amortization
Fixed assets useful life	4 years
Site Improvements | Maximum
Depreciation and Amortization
Fixed assets useful life	15 years
Furniture, Fixtures, and Equipment | Minimum
Depreciation and Amortization
Fixed assets useful life	1 year
Furniture, Fixtures, and Equipment | Maximum
Depreciation and Amortization
Fixed assets useful life	12 years