SCHEDULE III - SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION - Rollforward Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Change in accumulated depreciation
Gross amount of accumulation depreciation at beginning of year:	$ 1,072,013	$ 1,011,050
Additions during period:
Depreciation	123,447	122,366
Other adjustments	0	1,314
Foreign currency translation fluctuations	8,590	3,514
Total additions	132,037	127,194
Deductions during period
Amount of accumulated depreciation for real estate assets sold, disposed or written-down	(54,978)	(66,231)
Other adjustments	(51,456)	0
Accumulated depreciation, gross	(106,434)	(66,231)
Gross amount of end of period	1,097,616	$ 1,072,013
Aggregate Cost of Real Estate Assets	$ 3,769,000