Schedule III - Real Estate and Accumulated Depreciation - Real Estate Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Beginning balance, January 1	$ 2,573,296	$ 2,490,630	$ 2,972,803
Additions during the year:
Acquisitions	0	0	8,472
Acquisitions through foreclosure and other transfers	28,843	75,245	27,416
Improvements	24,390	25,164	30,865
Contingent consideration issued	0	1,576	2,877
Total additions	53,233	101,985	69,630
Deductions during the year:
Costs of real estate sold	(55,945)	(19,319)	(535,417)
Deconsolidation of multifamily properties	(1,222,740)	0	0
Foreign currency translation	0	0	(15,702)
Other	0	0	(684)
Total deductions	(1,278,685)	(19,319)	(551,803)
Ending balance, December 31	$ 1,347,844	$ 2,573,296	$ 2,490,630