Mortgages and Notes Payable (Details)	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) numberOfBuildings	Dec. 31, 2019
Debt Instrument [Line Items]
Mortgages and notes payable, net	$ 3,213,206,000	$ 3,197,215,000
Less-unamortized debt issuance costs	(17,739,000)	(16,393,000)
Scheduled future principal payments [Abstract]
2024	6,944,000
2025	27,156,000
2026	206,922,000
2027	458,976,000
2028	699,168,000
Thereafter	1,831,779,000
Less-unamortized debt issuance costs	(17,739,000)	(16,393,000)
Mortgages and notes payable, net	3,213,206,000	3,197,215,000
Gains/(losses) on debt extinguishment	$ (602,000)	0	$ (286,000)
Lender covenant compliance to accelerate outstanding borrowings	51.00%
Cross-default minimum threshold	$ 35,000,000
Holders covenant compliance of bonds	25.00%
Uncured covenant compliance default period	60 days
Maximum liquidity requirements	1 year
Capitalized Interest [Abstract]
Capitalized Interest	$ 9,000,000	4,000,000	$ 9,600,000
Variable Interest Entity, Primary Beneficiary [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	$ 44,192,000	0
Percentage of equity interest in consolidated affiliates				80.00%
Effective interest rate (in hundredths)	7.29%
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	$ 44,192,000	0
Principal amount of debt	45,000,000
Debt issuance costs	$ 800,000
Term of debt instrument (in years)	5 years
Floating to Fixed Interest Rate Swaps (2017) [Member]
Scheduled future principal payments [Abstract]
Amount of borrowings outstanding, subject to swaps	$ 50,000,000
Underlying treasury rate term (in years)	1 month
Weighted average interest rate under derivative instruments (in hundredths)	1.693%
2023 Forward Starting Swaps [Member]
Scheduled future principal payments [Abstract]
Amount of borrowings outstanding, subject to swaps	$ 200,000,000
Underlying treasury rate term (in years)	10 years
Weighted average interest rate under derivative instruments (in hundredths)	4.498%
Gain on forward starting interest rate swaps	$ (500,000)
5.69% Mortgage Loan due 2028 [Member]
Debt Instrument [Line Items]
Effective interest rate (in hundredths)	5.69%
Scheduled future principal payments [Abstract]
Principal amount of debt	$ 200,000,000
Debt issuance costs	$ 1,300,000
Term of debt instrument (in years)	5 years
3.625% (3.752% effective rate) Notes due 2023 [Member]
Scheduled future principal payments [Abstract]
Principal amount of debt		$ 250,000,000
Stated interest rate (in hundredths)		3.625%
7.650% (7.836% effective rate) Notes due 2034 [Member]
Debt Instrument [Line Items]
Effective interest rate (in hundredths)	7.836%
Scheduled future principal payments [Abstract]
Principal amount of debt	$ 350,000,000
Stated interest rate (in hundredths)	7.65%
Original issuance discount	$ 4,600,000
Debt issuance costs	3,200,000
Gains/(losses) on debt extinguishment	(600,000)
Variable Rate Term Loan due 2026 [Member]
Scheduled future principal payments [Abstract]
Principal amount of debt		$ 200,000,000
Variable Rate Term Loan due 2027 [Member]
Scheduled future principal payments [Abstract]
Temporary reduction in interest rate due to sustainability goals (in hundredths)		0.025%
Principal amount of debt		$ 150,000,000
Debt issuance costs		$ 2,700,000
Variable Rate Term Loan due 2027 [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Scheduled future principal payments [Abstract]
Interest rate		SOFR
Interest rate, basis spread (in hundredths)		0.95%
Variable Rate Term Loan due 2027 [Member] | SOFR Related Spread Adjustment [Member]
Scheduled future principal payments [Abstract]
Interest rate, basis spread (in hundredths)		0.10%
Variable Rate Term Loan due 2024 [Member]
Scheduled future principal payments [Abstract]
Temporary reduction in interest rate due to sustainability goals (in hundredths)		0.01%
Principal amount of debt		$ 200,000,000
Term of debt instrument (in years)		2 years
Variable Rate Term Loan due 2024 [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Scheduled future principal payments [Abstract]
Interest rate		SOFR
Interest rate, basis spread (in hundredths)		0.95%
Variable Rate Term Loan due 2024 [Member] | SOFR Related Spread Adjustment [Member]
Scheduled future principal payments [Abstract]
Interest rate, basis spread (in hundredths)		0.10%
Revolving Credit Facility [Member]
Scheduled future principal payments [Abstract]
Maximum borrowing capacity on revolving credit facility	$ 750,000,000
Annual facility fee (in hundredths)	0.20%
Temporary reduction in interest rate due to sustainability goals (in hundredths)	0.01%
Amount outstanding on revolving credit facility	$ 20,000,000
Outstanding letters of credit on revolving credit facility	900,000
Unused borrowing capacity on revolving credit facility	$ 729,100,000
Revolving Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Scheduled future principal payments [Abstract]
Interest rate	SOFR
Interest rate, basis spread (in hundredths)	0.85%
Revolving Credit Facility [Member] | SOFR Related Spread Adjustment [Member]
Scheduled future principal payments [Abstract]
Interest rate, basis spread (in hundredths)	0.10%
PAC Portfolio Acquisition [Member]
Debt Instrument [Line Items]
Effective interest rate (in hundredths)			3.54%
Scheduled future principal payments [Abstract]
Principal amount of debt			$ 403,000,000
Debt issuance costs			$ 3,500,000
Term of debt instrument (in years)			10 years 8 months 12 days
Number of loans assumed in acquisition | numberOfBuildings			4
Unsecured Bridge Facility Due 2022 [Member]
Scheduled future principal payments [Abstract]
Maximum borrowing capacity on revolving credit facility			$ 200,000,000
Interest rate, basis spread (in hundredths)			0.85%
Annual facility fee (in hundredths)			0.20%
Debt issuance costs			$ 1,000,000
Gains/(losses) on debt extinguishment			$ (200,000)
Term of debt instrument (in years)			6 months
3.20% (3.363% effective rate) Notes due 2021 [Member]
Scheduled future principal payments [Abstract]
Principal amount of debt			$ 150,000,000
Stated interest rate (in hundredths)			3.20%
Gains/(losses) on debt extinguishment			$ (100,000)
Carrying Amount of Notes, Total
Scheduled future principal payments [Abstract]
Principal amount of debt	$ 2,140,200,000
Secured indebtedness [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	720,752,000	$ 483,988,000
Aggregate undepreciated book value of secured real estate assets	1,237,600,000
Annual repayments through principal amortization	6,700,000
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	720,752,000	483,988,000
Secured indebtedness [Member] | 5.69% Mortgage Loan due 2028 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	200,000,000	0
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	200,000,000	0
Secured indebtedness [Member] | 7.29% Mortgage Loan due 2028 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	45,000,000	0
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	45,000,000	0
Secured indebtedness [Member] | 4.27% (3.61% effective rate) mortgage loan due 2028 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	110,391,000	113,105,000
Unamortized premium	2,700,000	3,300,000
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	110,391,000	113,105,000
Secured indebtedness [Member] | 4.0% Mortgage Loan Due 2029 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	87,003,000	89,204,000
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	87,003,000	89,204,000
Secured indebtedness [Member] | 3.61% (3.19% effective rate) mortgage loan due 2029 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	84,360,000	84,666,000
Unamortized premium	1,700,000	2,000,000
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	84,360,000	84,666,000
Secured indebtedness [Member] | 3.40% (3.50% effective rate) mortgage loan due 2033 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	69,524,000	69,473,000
Unamortized discount	500,000	500,000
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	69,524,000	69,473,000
Secured indebtedness [Member] | 4.60% (3.73% effective rate) mortgage loan due 2037 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	124,474,000	127,540,000
Unamortized premium	8,600,000	9,300,000
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	124,474,000	127,540,000
Unsecured indebtedness [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	2,510,193,000	2,729,620,000
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	2,510,193,000	2,729,620,000
Unsecured indebtedness [Member] | 3.875% (4.038% effective rate) Notes due 2027 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	298,734,000	298,334,000
Unamortized discount	1,300,000	1,700,000
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	298,734,000	298,334,000
Unsecured indebtedness [Member] | 4.125% (4.271% effective rate) Notes due 2028 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	348,276,000	347,863,000
Unamortized discount	1,700,000	2,100,000
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	348,276,000	347,863,000
Unsecured indebtedness [Member] | 4.20% (4.234% effective rate) Notes due 2029 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	349,484,000	349,386,000
Unamortized discount	500,000	600,000
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	349,484,000	349,386,000
Unsecured indebtedness [Member] | 3.050% (3.079% effective rate) Notes due 2030 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	399,400,000	399,302,000
Unamortized discount	600,000	700,000
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	399,400,000	399,302,000
Unsecured indebtedness [Member] | 2.600% (2.645% effective rate) Notes due 2031 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	398,892,000	398,735,000
Unamortized discount	1,100,000	1,300,000
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	398,892,000	398,735,000
Unsecured indebtedness [Member] | 7.650% (7.836% effective rate) Notes due 2034 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	345,407,000	0
Unamortized discount	4,600,000
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	345,407,000	0
Unsecured indebtedness [Member] | Variable Rate Term Loan due 2026 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	$ 200,000,000	200,000,000
Effective interest rate (in hundredths)	6.35%
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	$ 200,000,000	200,000,000
Unsecured indebtedness [Member] | Variable Rate Term Loan due 2027 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	$ 150,000,000	150,000,000
Effective interest rate (in hundredths)	6.35%
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	$ 150,000,000	150,000,000
Unsecured indebtedness [Member] | Variable Rate Term Loan due 2024 [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	$ 0	200,000,000
Effective interest rate (in hundredths)	6.35%
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	$ 0	200,000,000
Unsecured indebtedness [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Mortgages and notes payable, net	$ 20,000,000	386,000,000
Effective interest rate (in hundredths)	6.25%
Scheduled future principal payments [Abstract]
Mortgages and notes payable, net	$ 20,000,000	$ 386,000,000