Notes and Bonds Payable (Details) - USD ($)	Apr. 26, 2023	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Notes and bonds payable		$ 5,227,413,000	$ 5,351,827,000
Extension period for maturity date	1 year
Debt fees	$ 400,000
Mortgage notes payable | Minimum
Debt Instrument [Line Items]
Effective interest rate		3.57%
Mortgage notes payable | Maximum
Debt Instrument [Line Items]
Effective interest rate		6.88%
Line of credit | $1.5 billion Unsecured Credit Facility
Debt Instrument [Line Items]
Notes and bonds payable		$ 236,000,000	385,000,000
Effective interest rate		6.24%
Credit facility		$ 1,500,000,000
Medium-term notes | $200 million Unsecured Term Loan
Debt Instrument [Line Items]
Notes and bonds payable		$ 199,845,000	199,670,000
Effective interest rate		6.30%
Face amount		$ 200,000,000
Medium-term notes | $350 million Unsecured Term Loan
Debt Instrument [Line Items]
Notes and bonds payable		$ 349,711,000	349,114,000
Effective interest rate		6.30%
Face amount		$ 350,000,000
Medium-term notes | $300 million Unsecured Term Loan
Debt Instrument [Line Items]
Notes and bonds payable		$ 299,952,000	299,936,000
Effective interest rate		6.30%
Face amount		$ 300,000,000
Medium-term notes | $150 million Unsecured Term Loan
Debt Instrument [Line Items]
Notes and bonds payable		$ 149,606,000	149,495,000
Effective interest rate		6.30%
Face amount		$ 150,000,000
Medium-term notes | $200 million Unsecured Term Loan
Debt Instrument [Line Items]
Notes and bonds payable		$ 199,467,000	199,362,000
Effective interest rate		6.30%
Face amount		$ 200,000,000
Medium-term notes | $300 million Unsecured Term Loan
Debt Instrument [Line Items]
Notes and bonds payable		$ 298,184,000	297,869,000
Effective interest rate		6.30%
Face amount		$ 300,000,000
Senior notes | Senior Notes due 2025
Debt Instrument [Line Items]
Notes and bonds payable		$ 249,391,000	249,115,000
Effective interest rate		4.12%
Senior notes | Senior Notes due 2026
Debt Instrument [Line Items]
Notes and bonds payable		$ 577,124,000	571,587,000
Effective interest rate		4.94%
Senior notes | Senior Notes due 2027
Debt Instrument [Line Items]
Notes and bonds payable		$ 482,665,000	479,553,000
Effective interest rate		4.76%
Senior notes | Senior Notes due 2028
Debt Instrument [Line Items]
Notes and bonds payable		$ 297,283,000	296,852,000
Effective interest rate		3.85%
Senior notes | Senior Notes due 2030
Debt Instrument [Line Items]
Notes and bonds payable		$ 572,883,000	565,402,000
Effective interest rate		5.30%
Senior notes | Senior Notes due 2030
Debt Instrument [Line Items]
Notes and bonds payable		$ 296,679,000	296,385,000
Effective interest rate		2.72%
Senior notes | Senior Notes due 2031
Debt Instrument [Line Items]
Notes and bonds payable		$ 295,706,000	295,547,000
Effective interest rate		2.25%
Senior notes | Senior Notes due 2031
Debt Instrument [Line Items]
Notes and bonds payable		$ 645,232,000	632,693,000
Effective interest rate		5.13%
Mortgages | Mortgage notes payable
Debt Instrument [Line Items]
Notes and bonds payable		$ 77,685,000	$ 84,247,000