Basis of Presentation (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Basis Of Presentation
Assets	$ 7,066,048	$ 6,476,424
Liabilities	4,656,391	3,857,202
VIE, Primary Beneficiary
Basis Of Presentation
Assets	935,340	970,142
Liabilities	$ 690,714	$ 697,129
Joint Venture
Basis Of Presentation
Noncontrolling interest, ownership percentage by parent	45.00%
Ownership percentage	55.00%
Joint Venture \| Lire Science Building Located In Boston Massachusetts
Basis Of Presentation
Ownership percentage	55.00%
Joint Venture \| Lire Science Building Located In Boston Massachusetts \| Investor
Basis Of Presentation
Noncontrolling interest, ownership percentage by parent	45.00%

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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+ Details

- Definition

Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.

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