Debt - Summary (Details) $ in Thousands		3 Months Ended	9 Months Ended
	Sep. 15, 2025	Sep. 30, 2025 USD ($) extension extention Rate	Sep. 30, 2025 USD ($) extension extention Rate	Feb. 05, 2026	Jun. 13, 2025	Feb. 20, 2025	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Principal outstanding		$ 3,101,686	$ 3,101,686				$ 3,029,135
Long-term debt, gross		3,114,156	3,114,156				3,038,322
Debt Issuance Costs, Net		(12,349)	(12,349)				(9,060)
Unamortized fair market value discount		$ (121)	$ (121)				(127)
Weighted average interest rate		4.22%	4.22%
Facility fee			$ 1,000,000
Interest Rate Swaps
Debt Instrument [Line Items]
Derivative notional amount swapped		$ 1,025,000	$ 1,025,000
Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage			0.10%
Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage			0.30%
$200 Million Unsecured Term Loan F [Member]
Debt Instrument [Line Items]
Number of the Extensions | extension		2	2
Extensions Period		1 year
$100 Million Series D Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate						4.32%
$75 Million Series G Unsecured Notes [Member]
Debt Instrument [Line Items]
Stated interest rate					4.10%
Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Stated interest rate		4.1292%	4.1292%
Daily Simple Secured Overnight Financing Rate SOFR
Debt Instrument [Line Items]
Stated interest rate		4.24%	4.24%
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Term Loans A,F,G
Debt Instrument [Line Items]
Basis spread on variable rate			0.85%
Unsecured Credit Facility
Debt Instrument [Line Items]
Principal outstanding		$ 110,000	$ 110,000				409,000
Debt Instrument, Maturity Date			Sep. 07, 2029
Maximum borrowing capacity		$ 1,000,000	$ 1,000,000
Number Of Extensions | extention		2	2
Debt term extension period			6 months
Unsecured Credit Facility | Prepaid Expenses and Other Assets
Debt Instrument [Line Items]
Debt Issuance Costs, Net		$ (8,000)	$ (8,000)				(10,100)
Unsecured Credit Facility | Scenario, Plan | Subsequent Event
Debt Instrument [Line Items]
Stated interest rate				3.94%
Unsecured Credit Facility | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate | Rate			0.775%
Unsecured Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate			0.775%
Unsecured Term Loans
Debt Instrument [Line Items]
Principal outstanding		1,021,045	$ 1,021,045				1,021,848
Long-term debt, gross		1,025,000	1,025,000				1,025,000
Debt Issuance Costs, Net		(3,955)	$ (3,955)				(3,152)
Unsecured Term Loans | $150 Million Wells Fargo Unsecured Term Loan A
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Mar. 15, 2027
Long-term debt, gross		$ 150,000	$ 150,000				150,000
Stated interest rate		2.06%	2.06%
Unsecured Term Loans | $187.5 Million Unsecured Term Loan H
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Jan. 25, 2028
Long-term debt, gross		$ 187,500	$ 187,500				187,500
Stated interest rate		3.25%	3.25%
Unsecured Term Loans | $187.5 Million Unsecured Term Loan I
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Jan. 25, 2028
Long-term debt, gross		$ 187,500	$ 187,500				187,500
Stated interest rate		3.41%	3.41%
Unsecured Term Loans | $200 Million Unsecured Term Loan F [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Mar. 23, 2029
Long-term debt, gross		$ 200,000	$ 200,000				200,000
Stated interest rate		4.73%	4.73%
Unsecured Term Loans | $300 Million Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Mar. 14, 2031
Long-term debt, gross		$ 300,000	$ 300,000				300,000
Stated interest rate		1.70%	1.70%
Unsecured Notes
Debt Instrument [Line Items]
Principal outstanding		$ 1,966,606	$ 1,966,606				1,594,092
Long-term debt, gross		1,975,000	1,975,000				1,600,000
Debt Issuance Costs, Net		(8,394)	$ (8,394)				(5,908)
Unsecured Notes | $300 Million Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Stated interest rate	0.125%
Debt term extension period	1 year
Unsecured Notes | $100 Million Series D Unsecured Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Feb. 20, 2025
Long-term debt, gross		$ 0	$ 0				100,000
Stated interest rate		4.32%	4.32%
Unsecured Notes | $75 Million Series G Unsecured Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Jun. 13, 2025
Long-term debt, gross		$ 0	$ 0				75,000
Stated interest rate		4.10%	4.10%
Unsecured Notes | $50 Million Series B Unsecured Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Jul. 01, 2026
Long-term debt, gross		$ 50,000	$ 50,000				50,000
Stated interest rate		4.98%	4.98%
Unsecured Notes | $80 Million Series C Unsecured Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Dec. 30, 2026
Long-term debt, gross		$ 80,000	$ 80,000				80,000
Stated interest rate		4.42%	4.42%
Unsecured Notes | $20 Million Series E Unsecured Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Feb. 20, 2027
Long-term debt, gross		$ 20,000	$ 20,000				20,000
Stated interest rate		4.42%	4.42%
Unsecured Notes | $100 Million Series H Unsecured Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Jun. 13, 2028
Long-term debt, gross		$ 100,000	$ 100,000				100,000
Stated interest rate		4.27%	4.27%
Unsecured Notes | $175 Million Series L Unsecured Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			May 28, 2029
Long-term debt, gross		$ 175,000	$ 175,000				175,000
Stated interest rate | Rate		6.05%	6.05%
Unsecured Notes | $350 Million Series O Unsecured Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Jun. 25, 2030
Long-term debt, gross		$ 350,000	$ 350,000				0
Stated interest rate		5.50%	5.50%
Unsecured Notes | $125 Million Series M Unsecured Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			May 28, 2031
Long-term debt, gross		$ 125,000	$ 125,000				125,000
Stated interest rate | Rate		6.17%	6.17%
Unsecured Notes | $275 Million Series I Unsecured Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Sep. 29, 2031
Long-term debt, gross		$ 275,000	$ 275,000				275,000
Stated interest rate		2.80%	2.80%
Unsecured Notes | $400 Million Series K Unsecured Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Jun. 28, 2032
Long-term debt, gross		$ 400,000	$ 400,000				400,000
Stated interest rate		4.12%	4.12%
Unsecured Notes | $100 Million Series P Unsecured Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Jun. 25, 2033
Long-term debt, gross		$ 100,000	$ 100,000				0
Stated interest rate		5.82%	5.82%
Unsecured Notes | $50 Million Series J Unsecured Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Sep. 28, 2033
Long-term debt, gross		$ 50,000	$ 50,000				50,000
Stated interest rate		2.95%	2.95%
Unsecured Notes | $150 Million Series N Unsecured Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			May 28, 2034
Long-term debt, gross		$ 150,000	$ 150,000				150,000
Stated interest rate		6.30%	6.30%
Unsecured Notes | $100 Million Series Q Unsecured Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Jun. 25, 2035
Long-term debt, gross		$ 100,000	$ 100,000				0
Stated interest rate		5.99%	5.99%
Mortgage Loans Payable
Debt Instrument [Line Items]
Principal outstanding		$ 4,035	$ 4,035				4,195
Long-term debt, gross		4,156	4,156				4,322
Unamortized fair market value discount		(121)	$ (121)				(127)
Mortgage Loans Payable | United of Omaha Life Insurance Company
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Oct. 01, 2039
Long-term debt, gross		$ 4,156	$ 4,156				$ 4,322
Stated interest rate		3.71%	3.71%