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Period Type:

Debt - Summary (Details) $ in Thousands	3 Months Ended
Debt - Summary (Details) $ in Thousands	Mar. 31, 2025 USD ($) extention extension Rate	Jan. 15, 2025	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Principal outstanding	$ 3,032,630		$ 3,029,135
Long-term debt, gross	3,041,267		3,038,322
Debt Instrument, Unamortized Discount (Premium), Net	(125)		(127)
Unamortized debt issuance costs	$ (8,512)		(9,060)
Weighted average interest rate	4.13%
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%
Interest Rate Swaps
Debt Instrument [Line Items]
Derivative notional amount swapped	$ 1,025,000
Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Stated interest rate	4.3194%
Daily Simple Secured Overnight Financing Rate SOFR
Debt Instrument [Line Items]
Stated interest rate	4.3223%
Unsecured Credit Facility
Debt Instrument [Line Items]
Principal outstanding	$ 512,000		409,000
Unsecured Credit Facility \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Increase (Decrease)	0.10%
$200 Million Unsecured Term Loan F [Member]
Debt Instrument [Line Items]
Number of the Extensions \| extension	2
Extensions Period	1 year
Term Loans A,F,G \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.85%
Debt Instrument, Interest Rate, Increase (Decrease)	0.10%
Unsecured Credit Facility
Debt Instrument [Line Items]
Principal outstanding	$ 512,000		409,000
Debt Instrument, Maturity Date	Sep. 07, 2029
Maximum borrowing capacity	$ 1,000,000
Number Of Extensions \| extention	2
Debt Instrument Term Extension Period	6 months
Unsecured Credit Facility \| Prepaid Expenses and Other Assets
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ (9,400)		(10,100)
Unsecured Credit Facility \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate \| Rate	0.875%
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	$ 1,022,185		1,021,848
Long-term debt, gross	1,025,000		1,025,000
Unamortized debt issuance costs	(2,815)		(3,152)
Unsecured Term Loans \| $300 Million Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 300,000		300,000
Stated interest rate	1.80%
Debt Instrument, Maturity Date	Feb. 05, 2026
Fixed Interest Rate (as a percent)	0.95%
Unsecured Term Loans \| $150 Million Wells Fargo Unsecured Term Loan A
Debt Instrument [Line Items]
Long-term debt, gross	$ 150,000		150,000
Stated interest rate	2.16%
Debt Instrument, Maturity Date	Mar. 15, 2027
Fixed Interest Rate (as a percent)	1.31%
Unsecured Term Loans \| $187.5 Million Unsecured Term Loan H
Debt Instrument [Line Items]
Long-term debt, gross	$ 187,500		187,500
Stated interest rate	3.35%
Debt Instrument, Maturity Date	Jan. 25, 2028
Fixed Interest Rate (as a percent)	2.50%
Unsecured Term Loans \| $187.5 Million Unsecured Term Loan I
Debt Instrument [Line Items]
Long-term debt, gross	$ 187,500		187,500
Stated interest rate	3.51%
Debt Instrument, Maturity Date	Jan. 25, 2028
Fixed Interest Rate (as a percent)	2.66%
Unsecured Term Loans \| $200 Million Unsecured Term Loan F [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 200,000		200,000
Stated interest rate	4.83%
Debt Instrument, Maturity Date	Mar. 23, 2029
Fixed Interest Rate (as a percent)		3.98%
Unsecured Notes
Debt Instrument [Line Items]
Principal outstanding	$ 1,494,303		1,594,092
Long-term debt, gross	1,500,000		1,600,000
Unamortized debt issuance costs	(5,697)		(5,908)
Unsecured Notes \| $100 Million Series D Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 0		100,000
Stated interest rate	4.32%
Debt Instrument, Maturity Date	Feb. 20, 2025
Unsecured Notes \| $75 Million Series G Unsecured Notes [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 75,000		75,000
Stated interest rate	4.10%
Debt Instrument, Maturity Date	Jun. 13, 2025
Unsecured Notes \| $50 Million Series B Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 50,000		50,000
Stated interest rate	4.98%
Debt Instrument, Maturity Date	Jul. 01, 2026
Unsecured Notes \| $80 Million Series C Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 80,000		80,000
Stated interest rate	4.42%
Debt Instrument, Maturity Date	Dec. 30, 2026
Unsecured Notes \| $20 Million Series E Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 20,000		20,000
Stated interest rate	4.42%
Debt Instrument, Maturity Date	Feb. 20, 2027
Unsecured Notes \| $100 Million Series H Unsecured Notes [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 100,000		100,000
Stated interest rate	4.27%
Debt Instrument, Maturity Date	Jun. 13, 2028
Unsecured Notes \| $175 Million Series L Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 175,000		175,000
Stated interest rate \| Rate	6.05%
Debt Instrument, Maturity Date	May 28, 2029
Unsecured Notes \| $125 Million Series M Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 125,000		125,000
Stated interest rate \| Rate	6.17%
Debt Instrument, Maturity Date	May 28, 2031
Unsecured Notes \| $275 Million Series I Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 275,000		275,000
Stated interest rate	2.80%
Debt Instrument, Maturity Date	Sep. 29, 2031
Unsecured Notes \| $400 Million Series K Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 400,000		400,000
Stated interest rate	4.12%
Debt Instrument, Maturity Date	Jun. 28, 2032
Unsecured Notes \| $50 Million Series J Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 50,000		50,000
Stated interest rate	2.95%
Debt Instrument, Maturity Date	Sep. 28, 2033
Unsecured Notes \| $150 Million Series N Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 150,000		150,000
Stated interest rate	6.30%
Debt Instrument, Maturity Date	May 28, 2034
Mortgage Loans Payable
Debt Instrument [Line Items]
Principal outstanding	$ 4,142		4,195
Long-term debt, gross	4,267		4,322
Debt Instrument, Unamortized Discount (Premium), Net	(125)		(127)
Mortgage Loans Payable \| United of Omaha Life Insurance Company
Debt Instrument [Line Items]
Long-term debt, gross	$ 4,267		$ 4,322
Stated interest rate	3.71%
Debt Instrument, Maturity Date	Oct. 01, 2039