Other Investments (Other Real Estate Equity Investments) (Details)	1 Months Ended	3 Months Ended
	Jan. 31, 2021 USD ($) loan	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Schedule of Equity Method Investments [Line Items]
Net proceeds from sales of loans receivable		$ 79,560,000	$ 0
Other Real Estate Equity Investments | Minimum
Schedule of Equity Method Investments [Line Items]
Equity interest		33.00%
Other Real Estate Equity Investments | Maximum
Schedule of Equity Method Investments [Line Items]
Equity interest		95.00%
Other Real Estate Equity Investments | Operating Properties
Schedule of Equity Method Investments [Line Items]
Equity method investments		$ 57,000,000.0		$ 58,700,000
Other Real Estate Equity Investments | Land Assets
Schedule of Equity Method Investments [Line Items]
Equity method investments		$ 12,100,000		$ 31,200,000
Other Real Estate Equity Investment Aug 2018
Schedule of Equity Method Investments [Line Items]
Equity interest		50.00%		50.00%
Loans receivable, carrying value		$ 33,000,000.0		$ 33,000,000.0
Interest income		$ 600,000	$ 700,000
Other Real Estate Equity Investment January 2021
Schedule of Equity Method Investments [Line Items]
Equity interest	53.00%
Equity method investments	$ 63,300,000
Number of loans sold | loan	2
Net proceeds from sales of loans receivable	$ 83,400,000
Recognized gain or loss	$ 0