Schedule IV - Mortgage Loans on Real Estate - Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Beginning balance	$ 57,737	$ 0	$ 0
Repayments	(10,000)	0	0
Acquisitions through CPA:17 Merger	0	57,737	0
Ending balance	$ 47,737	$ 57,737	$ 0