Notes Payable and Unsecured Credit Facilities - Schedule of Debt Net of Unamortized Debt Premium (Discount) and Debt Issuance Costs (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Long-term Debt		$ 4,417,181	$ 4,153,949
Line of Credit		$ 30,000	152,000
Fixed Rate Mortgage Loans [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturity Date		Jun. 01, 2037
Debt, Weighted Average Contractual Interest Rate		3.80%
Debt, Weighted Average Effective Interest Rate		4.40%
Long-term Debt		$ 439,864	449,615
Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturity Date		Mar. 15, 2049
Debt, Weighted Average Contractual Interest Rate		4.00%
Debt, Weighted Average Effective Interest Rate		4.10%
Long-term Debt		$ 3,648,942	3,252,755
Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 4,387,181	4,001,949
Line of Credit [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturity Date	[1]	Mar. 23, 2028
Debt, Weighted Average Contractual Interest Rate	[1]	6.30%
Debt, Weighted Average Effective Interest Rate	[1]	6.70%
Long-term Debt	[1]	$ 30,000	152,000
SOFR [Member] | Variable Rate Mortgage Loans [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturity Date	[2]	Jan. 31, 2032
Debt, Weighted Average Contractual Interest Rate	[2]	4.20%
Debt, Weighted Average Effective Interest Rate	[2]	4.20%
Long-term Debt	[2]	$ 298,375	$ 299,579

[1] The Line is scheduled to mature on March 23, 2028. The Company has the option to extend the maturity for two additional six-month periods. Weighted average effective rate for the Line is calculated based on a fully drawn Line balance using the period end variable rate.

[2] As of March 31, 2024, 98.3% of the variable rate mortgage loans are fixed through interest rate swaps.