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Investments in Unconsolidated Entities - Narrative (Details) $ in Thousands |  |  | 1 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 16, 2021 USD ($) | Mar. 29, 2019 USD ($) | Apr. 30, 2021 USD ($) | Sep. 30, 2014 USD ($) ft² termExtension | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Sep. 09, 2020 USD ($) | Jun. 30, 2018 ft²
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Assets |  |  |  |  | $ 5,366,059 | $ 4,151,850 |  |
Receivable |  |  |  |  | $ 1,417 | $ 1,411 |  |
The Loan | Secured term loan |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Outstanding letter of credit |  | $ 8,200 |  |  |  |  |  |
Heritage Common X, Ltd. |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Area of real estate property (in sqft) | ft² |  |  |  |  |  |  |  | 200,000
Digital Realty Trust, Inc. |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Area of real estate property (in sqft) | ft² |  |  |  | 132,300 |  |  |  |
Equity method investment, ownership (percent) |  |  |  | 80.00% |  |  |  |
Gross acquisition value |  |  |  | $ 68,400 |  |  |  |
Assets |  |  |  | 187,500 |  |  |  |
Debt |  |  |  | $ 102,000 |  |  |  |
Weighted average remaining lease terms |  |  |  | 3 years |  |  |  |
Guaranteed rate of return (percent) |  |  |  |  | 7.00% |  |  |
Digital Realty Trust, Inc. | Subsequent Event |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Payment received |  |  | $ 4,100 |  |  |  |  |
Digital Realty Trust, Inc. | The Loan | Secured term loan |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Secured term loan |  |  |  | $ 102,000 |  |  |  |
Number of term extensions | termExtension |  |  |  | 2 |  |  |  |
Duration of each extension term |  | 12 months |  | 12 months |  |  |  |
Outstanding letter of credit |  | $ 10,200 |  |  |  |  | $ 8,200 |
Mercedes-Benz Financial Services USA | Heritage Common X, Ltd. |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Portion of building leased out (percent) |  |  |  |  | 100.00% |  |  |
Proceeds from sale of property | $ 30 |  |  |  |  |  |  |

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