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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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