Debt - Narrative (Details)				3 Months Ended	12 Months Ended
	Jul. 14, 2021 USD ($)	Jul. 13, 2021	Dec. 18, 2020 USD ($)	Sep. 30, 2021	Dec. 31, 2021 USD ($) property quarter	Dec. 31, 2021 USD ($) property quarter	Jul. 13, 2021
2023 Term Loan | LIBOR
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)					1.40%
2026 Term Loan | LIBOR
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)					1.40%
2024 Term Loan | LIBOR
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)					1.40%
Line of Credit | Line of Credit
Line of Credit Facility [Line Items]
Line of credit facility maximum borrowing capacity			$ 1,900,000,000
Line of Credit | Revolving Credit Facility
Line of Credit Facility [Line Items]
Minimum number of Pool Properties under credit agreement | property					15	15
Maximum aggregated pool value that may be contributed by a single Pool Property or tenant (percent)					15.00%	15.00%
Maximum of aggregate pool value that may be contributed by Pool Properties subject to ground leases (percent)					15.00%	15.00%
Maximum aggregate pool value that may be contributed by Pool Properties under development or assets under renovation (percent)					20.00%	20.00%
Minimum aggregate leasing percentage of all Pool Properties (percent)					90.00%	90.00%
Maximum unsecured leverage ratio (percent)					60.00%	60.00%
Minimum unsecured interest coverage ratio					2.00	2.00
Unsecured Debt | Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility maximum borrowing capacity			$ 750,000,000
Extended term on debt			1 year
Increase limit on borrowing capacity			$ 600,000,000
Remaining borrowing capacity					$ 376,500,000	$ 376,500,000
Loans Payable | 2023 Term Loan
Line of Credit Facility [Line Items]
Line of credit facility maximum borrowing capacity			$ 200,000,000		200,000,000	$ 200,000,000
Term of debt instrument			5 years			5 years
Loans Payable | 2023 Term Loan | External investment grade rating
Line of Credit Facility [Line Items]
Term of debt instrument						5 years
Loans Payable | 2026 Term Loan
Line of Credit Facility [Line Items]
Line of credit facility maximum borrowing capacity	$ 150,000,000		$ 150,000,000		150,000,000	$ 150,000,000
Term of debt instrument	7 years		7 years			7 years
Aggregate borrowings	$ 0
Loans Payable | 2026 Term Loan | External investment grade rating
Line of Credit Facility [Line Items]
Term of debt instrument						7 years
Loans Payable | 2026 Term Loan | LIBOR
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)		1.75%		1.40%
Debt Instrument, Basis Spread on Variable Rate, Rate Increase (Decrease)	3500.00%
Loans Payable | 2024 Term Loan
Line of Credit Facility [Line Items]
Line of credit facility maximum borrowing capacity			$ 400,000,000
Term of debt instrument			5 years			5 years
Loans Payable | 2024 Term Loan | External investment grade rating
Line of Credit Facility [Line Items]
Term of debt instrument						5 years
Loans Payable | 2024 Term Loan | LIBOR
Line of Credit Facility [Line Items]
Line of credit facility maximum borrowing capacity					400,000,000	$ 400,000,000
Loans Payable | 2025 Term Loan
Line of Credit Facility [Line Items]
Line of credit facility maximum borrowing capacity			$ 400,000,000		$ 400,000,000	$ 400,000,000
Term of debt instrument			5 years			5 years
Loans Payable | 2025 Term Loan | LIBOR
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)					1.40%
Loans Payable | Keybank Loans
Line of Credit Facility [Line Items]
Maximum consolidated leverage ratio (percent)					60.00%	60.00%
Maximum consolidated leverage ratio after material acquisition (percent)					65.00%	65.00%
Number of consecutive quarters subject to higher ratio | quarter					4
Minimum consolidated tangible net worth (percent)					75.00%	75.00%
Minimum consolidated tangible net worth					$ 2,000,000,000	$ 2,000,000,000
Tangible net worth, additional percentage of net future equity issuances (percent)					75.00%	75.00%
Tangible net worth, reduction for any payments used to redeem Company's or Borrower's stock (percent)					75.00%	75.00%
Minimum consolidated fixed charge coverage ratio					1.50	1.50
Maximum total secured debt ratio (percent)					40.00%	40.00%
Increase to maximum total secured debt ratio (percent)					5.00%	5.00%
Number of consecutive quarters subject to higher total secured debt ratio | quarter					4	4
Minimum unsecured interest coverage ratio					2.00	2.00
Maximum total secured recourse debt ratio (percent)					10.00%	10.00%
Aggregate maximum unhedged variable rate debt (percent)					30.00%	30.00%
Minimum | Unsecured Debt | Revolving Credit Facility | LIBOR
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)						1.30%
Minimum | Unsecured Debt | Revolving Credit Facility | LIBOR | External investment grade rating
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)						0.825%
Minimum | Loans Payable | 2026 Term Loan | LIBOR
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)	1.25%	1.65%				1.25%
Minimum | Loans Payable | 2026 Term Loan | LIBOR | External investment grade rating
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)						1.90%
Minimum | Loans Payable | 2026 Term Loan | Base Rate
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)	0.25%						0.65%
Maximum | Unsecured Debt | Revolving Credit Facility | LIBOR
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)						2.20%
Maximum | Unsecured Debt | Revolving Credit Facility | LIBOR | External investment grade rating
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)						1.55%
Maximum | Loans Payable | 2026 Term Loan | LIBOR
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)	2.15%			2.50%		2.15%
Maximum | Loans Payable | 2026 Term Loan | LIBOR | External investment grade rating
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)						1.75%
Maximum | Loans Payable | 2026 Term Loan | Base Rate
Line of Credit Facility [Line Items]
Interest rate spread on the variable rate debt (percent)	1.15%						1.50%