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Other Investments (Other Real Estate Equity Investments) (Details) $ in Thousands	1 Months Ended					12 Months Ended
	Dec. 31, 2021 USD ($)	Nov. 30, 2021 USD ($)	Jan. 31, 2021 USD ($) loan	May 31, 2019 USD ($)	Apr. 30, 2019 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2021 USD ($)	Aug. 31, 2018 USD ($)	Dec. 31, 2016 USD ($)
Schedule of Equity Method Investments [Line Items]
Equity interest	51.90%					51.90%
Payments to acquire real estate assets				$ 56,700
Net proceeds from sales of loans receivable						$ 122,609	$ 11,000	$ 5,898
Ground Lease Plus Fund
Schedule of Equity Method Investments [Line Items]
Equity interest		53.00%
Other real estate equity investments | Minimum
Schedule of Equity Method Investments [Line Items]
Equity interest	48.00%					48.00%
Other real estate equity investments | Maximum
Schedule of Equity Method Investments [Line Items]
Equity interest	95.00%					95.00%
Other real estate equity investments | Operating Properties
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 43,300					$ 43,300	58,700
Other real estate equity investments | Land
Schedule of Equity Method Investments [Line Items]
Equity method investments	1,100					1,100	31,200
Other real estate equity investments | Ground leases
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 17,600					$ 17,600
Other Real Estate Equity Investment Aug 2018
Schedule of Equity Method Investments [Line Items]
Equity interest										50.00%
Equity Interest sold	50.00%					50.00%
Loans receivable, carrying value										$ 33,000
Interest income						$ 2,300	$ 2,400	$ 2,800
Other Real Estate Equity Investment January 2021
Schedule of Equity Method Investments [Line Items]
Equity interest			53.00%
Equity method investments			$ 63,300
Number of loans sold | loan			2
Net proceeds from sales of loans receivable			$ 83,400
Recognized gain or loss			$ 0
Other Real Estate Equity Investment September 2021
Schedule of Equity Method Investments [Line Items]
Equity interest									53.00%
Commitment to provide loan to lessee									$ 75,000
Other Real Estate Investment November 2021
Schedule of Equity Method Investments [Line Items]
Recognized gain or loss	$ 0
Other Real Estate Investment November 2021 | Land
Schedule of Equity Method Investments [Line Items]
Payments to acquire real estate assets		$ 33,300
Other Real Estate Equity Investment Dec 2016
Schedule of Equity Method Investments [Line Items]
Equity interest								50.00%
Other Real Estate Equity Investment Dec 2016 | Operating Properties
Schedule of Equity Method Investments [Line Items]
Equity interest											50.00%
Interest income								$ 600
Loans commitment											$ 27,000
Other Real Estate Equity Investment Dec 2016 | SAFE | Operating Properties
Schedule of Equity Method Investments [Line Items]
Payments to acquire real estate assets					$ 7,300
Senior note assumed in asset acquisition					27,000
Total consideration					$ 34,300
Ground Lease Plus Fund | Maximum
Schedule of Equity Method Investments [Line Items]
Period pertaining to first look rights on qualifying pre-development projects		2 years

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