Real Estate Assets - Depreciation and Amortization (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition
Intangible Assets, Gross (Excluding Goodwill)		$ 225,800,000
finite lived intangible liabilities accumulated amortization	$ 36,300,000
Depreciation:
Depreciation	139,951,000	163,876,000	$ 149,884,000
Amortization:
Depreciation and amortization	169,193,000	201,677,000	185,065,000
Below Market Lease, Accumulated Amortization	36,314,000	34,006,000
Furniture and Fixtures [Member]
Depreciation:
Depreciation	40,836,000	50,474,000	50,747,000
Building and Building Improvements [Member]
Depreciation:
Depreciation	99,115,000	113,402,000	99,137,000
Finite-Lived Intangible Assets [Member]
Amortization:
Amortization of Intangible Assets	27,439,000	36,030,000	34,057,000
Lease Agreements [Member]
Amortization:
Amortization of Deferred Leasing Fees	1,635,000	1,576,000	933,000
Website Development [Member]
Amortization:
amortization website development costs	$ 168,000	$ 195,000	$ 191,000
Maximum [Member]
Business Acquisition
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years 1 month 6 days
Minimum [Member]
Business Acquisition
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 4 months 24 days