Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Mortgage Notes Payable, Net - McLaren Loan (Details) - Mortgage notes payable $ in Thousands, £ in Millions	Sep. 30, 2021 USD ($)	Apr. 30, 2021 USD ($)	Apr. 30, 2021 GBP (£)	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Mortgage loan amount	$ 1,501,050			$ 1,378,686
Mortgage discount	2,622			0
McLaren Loan
Debt Instrument [Line Items]
Mortgage discount		$ 3,100
GBP
Debt Instrument [Line Items]
Mortgage loan amount	445,650			301,979
GBP \| McLaren Loan
Debt Instrument [Line Items]
Mortgage loan amount	$ 135,939		£ 101.0	$ 0
Stated interest rate		6.00%	6.00%