Debt - Current Year Activity (Details) $ in Thousands				3 Months Ended			9 Months Ended
	Sep. 15, 2025 USD ($)	Jun. 13, 2025 USD ($)	Feb. 20, 2025 USD ($)	Sep. 30, 2025 USD ($)	Mar. 31, 2025	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Apr. 15, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount				$ 886,800			$ 886,800
Facility fee							1,000,000
Repayment of unsecured term loans							$ 55,000	$ 0
Debt Instrument, Covenant Compliance					The Company was in compliance with all such applicable restrictions and financial and other covenants		The Company was in compliance with all such applicable restrictions and financial and other covenants
Net book value of properties that are collateral for debt arrangements				7,100			$ 7,100			$ 7,300
Long-term debt, gross				3,114,156			3,114,156			3,038,322
Debt extinguishment and modification expenses				1,503		$ 36	1,503	703
Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross				1,975,000			1,975,000			1,600,000
Interest Expense [Member]
Debt Instrument [Line Items]
Amortization of deferred financing fees				1,406		1,165	4,044	3,201
Facility fee				440		$ 444	1,314	$ 1,322
Accounts Payable and Accrued Liabilities [Member]
Debt Instrument [Line Items]
Interest payable				30,500			30,500			13,700
$100 Million Series D Unsecured Notes
Debt Instrument [Line Items]
Repayment of unsecured term loans			$ 100,000
Stated interest rate			4.32%
$100 Million Series D Unsecured Notes | Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross				$ 0			$ 0			100,000
Stated interest rate				4.32%			4.32%
$75 Million Series G Unsecured Notes [Member]
Debt Instrument [Line Items]
Repayment of unsecured term loans		$ 75,000
Stated interest rate		4.10%
$75 Million Series G Unsecured Notes [Member] | Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross				$ 0			$ 0			$ 75,000
Stated interest rate				4.10%			4.10%
$350 Million Unsecured Notes | Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross									$ 350,000
Stated interest rate									5.50%
$100 Million Unsecured Notes | Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross									$ 100,000
Stated interest rate									5.82%
$100 Million Unsecured Notes 4-15-25 | Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross									$ 100,000
Stated interest rate									5.99%
$300 Million Unsecured Term Loan [Member] | Unsecured Notes
Debt Instrument [Line Items]
Stated interest rate	0.125%
Debt term extension period	1 year
Variable rate, interest rate adjustment (as a percent)	0.0010
Debt issuance costs	$ 1,800
Accrued extension fee	$ 400
Unsecured Term Loan A, F, H and I | Unsecured Notes
Debt Instrument [Line Items]
Variable rate, interest rate adjustment (as a percent)	0.0010