SCHEDULE III - SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION - Rollforward Gross Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Activity in Real Estate
Gross amount at beginning of period	$ 3,856,515	$ 3,700,307
Additions during period:
Discretionary capital projects	157,239	278,508
Other adjustments	66,978	25,077
Foreign currency translation fluctuations	10,198	5,978
Total additions	234,415	309,563
Deductions during period:
Cost of real estate sold, disposed or written-down	(178,869)	(153,355)
Other adjustments	(81,572)	0
Total additions	(260,441)	(153,355)
Gross amount at end of period	$ 3,830,489	$ 3,856,515