Schedule III - Real Estate and Accumulated Depreciation (Rollforward) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Carrying Amount of Real Estate Investments
Balance, beginning of period	$ 817,763	$ 591,005	$ 290,212
Acquisitions	524,638	244,132	282,162
Other additions	11,257	14,653	5,561
Write-Offs/Cost of real estate sold	(3,766)	(21,370)	0
Effect of changes in foreign currency exchange rates	5,954	(10,657)	13,070
Balance, end of period	1,355,846	817,763	591,005
Reconciliation of Real Estate Accumulated Depreciation
Balance, beginning of period	(30,574)	(18,172)	(6,337)
Depreciation	(24,873)	(13,938)	(11,393)
Effect of changes in foreign currency exchange rates	(38)	459	(442)
Retirement or sales of assets	3,766	1,077	0
Balance, end of period	$ (51,719)	$ (30,574)	$ (18,172)