Notes Payable and Unsecured Credit Facility - Schedule of Debt Net of Unamortized Debt Premium (Discount) and Debt Issuance Costs (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term Debt		$ 4,153,949	$ 3,726,754
Line of Credit		$ 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		4.20%
Long-term Debt		$ 449,615	342,135
Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturity Date		Mar. 15, 2049
Debt, Weighted Average Contractual Interest Rate		3.80%
Debt, Weighted Average Effective Interest Rate		4.00%
Long-term Debt		$ 3,252,755	3,248,373
Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 4,001,949	3,726,754
Line of Credit [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturity Date	[1]	Mar. 23, 2025
Debt, Weighted Average Contractual Interest Rate	[1]	6.30%
Debt, Weighted Average Effective Interest Rate	[1]	6.60%
Long-term Debt	[1]	$ 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]	4.30%
Long-term Debt	[2]	$ 299,579	$ 136,246

[1] Weighted average effective rate for the Line is calculated based on a fully drawn Line balance using the period end variable rate. In January 2024, the Company amended its Line to, among other items, increase the borrowing capacity to $1.5 billion and to extend the expiration date to March, 2028 with the option to extend the expiration for two additional six-month period.

[2] As of December 31, 2023, 15 of these 17 variable rate loans, representing $294.9 million of debt in the aggregate, have interest rate swaps in place to mitigate interest rate fluctuation risk. Based on these swap agreements, the effective fixed rates of the 15 loans range from 2.5% to 6.7%.