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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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