Agreements and Transactions with Related Parties - Asset Management, Structuring, Other Revenue and Personnel, Overhead Costs (Details) - Affiliated Entity	3 Months Ended	9 Months Ended
	Jun. 30, 2020	Sep. 30, 2020
CPA:18 – Global | Average equity value
Related Party Transaction
Percentage of asset management fees paid in cash (percentage)	50.00%
CPA:18 – Global | Average equity value | Class A
Related Party Transaction
Percentage of asset management fees paid in shares (percentage)		50.00%
CPA:18 – Global | Average equity value | Minimum | Class A
Related Party Transaction
Asset management fees earned (percentage)		0.50%
CPA:18 – Global | Average equity value | Maximum | Class A
Related Party Transaction
Asset management fees earned (percentage)		1.50%
CESH | Gross assets fair value
Related Party Transaction
Asset management fees earned (percentage)		1.00%